Repairs & Maintenance
125 sources in the library on repairs & maintenance, 29 on this page cited in a published note. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 1 of 4.
- very strong RN-TPT915 cited
Department for Environment, Food and Rural Affairs
Defra guidance, last revised 28 September 2011, and the authoritative plain-English account of the private sewers transfer that most drainage guides get vague about. Paragraph 2: on 1 OCTOBER 2011 all privately owned sewers and lateral drains which communicate with (drain to) an existing public sewer as at 1 JULY 2011 became the responsibility of the sewerage undertaker. Paragraph 3: private pumping stations on transferred pipework transfer between 1 October 2011 and 1 OCTOBER 2016, with any not transferred earlier transferring on that date; pipework upstream of a pumping station transferred on 1 October 2011. Definitions (from s.219 Water Industry Act 1991): a SEWER is a drain shared or used by more than one property; a LATERAL DRAIN serves a single property but lies outside its curtilage, under another property or the street. Both definitions include manholes, ventilating shafts, access chambers, pumps and valves. Paragraph 48: an occupier can only commission work within the private drain and has no authority to commission work in a public sewer or lateral drain without first contacting the water and sewerage company. Paragraph 49: interfering with a public sewer or public lateral drain without consent may lead to prosecution.
Cited in Blocked Drains: Causes & Clearing Costs.
- very strong RN-CDLNT7 cited
Health and Safety Executive
The specific HSE information sheet behind the dust advice, with the numbers a note can quote. Names three types of construction dust: silica dust, also called respirable crystalline silica, from concrete, mortar and sandstone; wood dust from softwood, hardwood and wood-based products including MDF and plywood; and other general dust from materials with little or no silica, most commonly gypsum as in plasterboard, limestone, marble and dolomite. States that over 500 construction workers are believed to die from exposure to silica dust every year, and that the main dust-related diseases are lung cancer, silicosis, chronic obstructive pulmonary disease and asthma, most developing slowly though advanced silicosis and asthma can come on quickly. The legal framework is the Control of Substances Hazardous to Health Regulations 2002, and the three required steps are Assess, Control and Review. On damping down it corrects a common site habit: water needs enough supply at the right levels for the whole time the work is being done, and just wetting the material beforehand does not work. High dust levels come from high-energy tools such as cut-off saws, grinders and grit blasters.
Cited in How to Insulate a Loft (DIY), How to Tile a Wall or Floor, Interior Finishes: The Complete UK Guide (2026), Kitchen Worktops Compared: Quartz, Granite, Laminate.
- very strong RN-P72KJ9 cited
Health and Safety Executive
The HSE starting point for the pre-2000 rule that every renovation note should carry as a warning. Asbestos was used in many industries and buildings until it was banned in 1999, and HSE states that buildings constructed after 2000 are unlikely to contain asbestos, so the risk sits with anything built or refurbished before that date. Around 5,000 people die every year from asbestos-related diseases, making it the leading cause of work-related deaths in Great Britain. The danger comes from disturbing the material through drilling, refurbishment, demolition and installation work rather than from its presence alone. Compliance is governed by the Control of Asbestos Regulations and the Approved Code of Practice, Managing and working with asbestos, and a separate HSE section sets out when a licensed contractor must do the work.
Cited in Average Loft Conversion Cost: Real 2026 Breakdown by Type.
- very strong RN-21AA4H cited
Health and Safety Executive
The HSE rules a DIY note should quote whenever a job involves a ladder, in HSE's own words. For a leaning ladder, use the 1 in 4 rule: the ladder should be one space or unit of measurement out for every four spaces or units up, which is a 75 degree angle. Do not work off the top three rungs, and make sure the ladder extends at least 1 metre or three rungs above the point where you are working. Maintain three points of contact when climbing and wherever possible at the work position. Secure the ladder, for example by tying it, to prevent it slipping outwards or sideways. Only carry light materials and tools. For stepladders, do not stand and work on the top three steps, including a step forming the very top of the stepladder, unless there is a suitable handhold, and maintain three points of contact at the working position, meaning two feet and one hand. HSE frames ladders as suitable for low-risk, short-duration tasks only, which is the test to apply before recommending one for a whole-roof or whole-wall job.
Cited in The Complete UK Roofing Guide (2026).
- very strong RN-KS3PJK cited
Health and Safety Executive
The specific HSE sheet a floor sanding or joinery note should cite instead of a generic dust warning. WIS23 Revision 3 states that all wood dust is a substance hazardous to health because it can cause serious non-reversible problems including asthma, dermatitis and irritation of the eyes, nose and throat, and that hardwood dust can also cause a rare type of nasal cancer. It identifies fine dust as the biggest risk because it is breathed deep into the lungs and travels furthest from the process, so ledges and surfaces need regular cleaning. Wood dust is also flammable and can cause fire or explosion, with premises severely damaged or destroyed every year by wood dust fires that usually start in dust extraction equipment. The activities named as producing high exposures are machining, particularly sawing, routing and turning; sanding by machine and by hand-held powered sanders; using compressed airlines to blow dust off work, which is to be avoided; bagging dust from extraction systems; and housekeeping, especially dry sweeping. Wood dust is covered by COSHH.
- very strong RN-NPO8FJ cited
Ministry of Housing, Communities and Local Government
The statutory figures behind a damp diagnosis, and the numbers to quote when a note explains why ground levels or a bridged damp proof course cause rising damp. Paragraph 5.2 requires that in an external wall the damp-proof course should be at least 150mm above the level of the adjoining ground (Diagram 8) unless part of the building protects the wall, and that in an external cavity wall the cavity should be taken down at least 225mm below the level of the lowest damp-proof course, or a damp-proof tray provided (Diagram 9a). For suspended timber ground floors it requires a ventilated air space of at least 75mm from the ground covering to the underside of any wall-plates and at least 150mm to the underside of the suspended timber floor or insulation, with ventilation openings on two opposing external walls of not less than 1,500mm2 per metre run of external wall or 500mm2 per square metre of floor area, whichever is greater; for suspended concrete floors the clear ventilated space is at least 150mm with the same opening sizes. Section 2.39 onwards covers radon, referring to BRE Report BR 211 for protective measures. The 2013 edition was published on 3 September 2013 with changes in effect from 1 October 2013.
Cited in Barge Boards, Fascias & Soffits: Cost & Replacement, Breathable Membranes for Roofs & Walls, Brick Slips & Brick Cladding Systems, Build Basement Cost: 2026 UK Price Guide and 35 more.
- very strong RN-QD1SFF cited
Ministry of Housing, Communities and Local Government
Table 1.1 sets minimum intermittent extract rates: kitchen with a cooker hood extracting outside 30 l/s, kitchen without one 60 l/s, utility room 30 l/s, bathroom 15 l/s, sanitary accommodation 6 l/s. Extract terminals and fans other than cooker hoods should be as high as practicable and no more than 400mm below the ceiling; a cooker hood should sit between 650mm and 750mm above the hob if the manufacturer gives no figure. Table 1.7 requires background ventilators of at least 8000mm2 equivalent area in habitable rooms and kitchens for a dwelling, 10,000mm2 for a single-storey dwelling. Background ventilators should be at least 1700mm above floor level and at least 500mm from a fan in the same room. On replacement windows, paragraph 3.14 says new windows must carry background ventilators no smaller than the originals, and paragraph 3.15 gives the fallback minimums where the old size is unknown: 8000mm2 habitable rooms, 8000mm2 kitchen, 4000mm2 bathroom. Paragraph 3.32 confirms that replacing an extractor fan or cooker hood on existing cabling is not notifiable.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Annexe & Granny Flat: Cost, Planning & Rules, Basement & Cellar Conversions: Cost, Bathroom Remodel Cost: 2026 UK Price Guide and 44 more.
- very strong RN-SM6TRW cited
Ministry of Housing, Communities and Local Government
The statutory source for soakaway design and the discharge hierarchy every garden drainage note should state. Requirement H3(3) lists the order of priority for rainwater discharge: (a) an adequate soakaway or other adequate infiltration system, or where not reasonably practicable (b) a watercourse, or where not reasonably practicable (c) a sewer. Paragraph 3.25 bars infiltration devices within 5 metres of a building or road, in ground where the water table reaches the bottom of the device at any time of year, too close to other drainage fields or soakaways, or where contamination could pollute groundwater. Paragraph 3.26: soakaways serving less than 100 square metres are generally square or circular pits filled with rubble or lined with dry-jointed masonry or perforated ring units. Paragraph 3.27: design to a return period of once in ten years, and for small soakaways serving 25 square metres or less a design rainfall of 10mm in 5 minutes may be assumed as the worst case. Paragraph 3.28 requires percolation tests to derive the infiltration rate, and paragraph 3.30 sends larger soakaways to BS EN 752-4 or BRE Digest 365 Soakaway design. Paragraphs 2.10 to 2.12 cover pervious paving over a granular storage reservoir and warn against its use where sediment or oil spillage would block the pores. For foul drainage, paragraph 2.33 sets a minimum 75mm internal diameter, or 100mm for a WC, and Table 6 gives minimum gradients of 1 in 40 for 75mm and 100mm at peak flows under 1 litre per second.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Annexe & Granny Flat: Cost, Planning & Rules, Blocked Drains: Causes & Clearing Costs, Garden Drainage & Soakaways Explained and 21 more.
- very strong RN-L0FCJX cited
Ministry of Housing, Communities and Local Government
The in-force U-value tables a DIY insulation or door note must quote, with the exact numbers. Table 4.2, limiting U-values for new fabric elements in existing dwellings, sets roof 0.15, wall 0.18, floor 0.18, swimming pool basin 0.25, window 1.4 or Window Energy Rating Band B minimum, rooflight 2.2, doors with more than 60 per cent of the internal face glazed 1.4 or Doorset Energy Rating Band C minimum, and other doors 1.4 or Doorset Energy Rating Band B minimum. Table 4.3, for existing elements, gives a roof threshold of 0.35 and an improved value of 0.16, which is the figure a loft insulation note needs: paragraph 4.12 says a retained element whose U-value is higher than the column (a) threshold, for example through a loft or garage conversion, should be upgraded to the column (b) value. Paragraph 4.13 allows a lesser upgrade only where the improved value is not technically or functionally feasible or would not achieve a simple payback of 15 years or less. Paragraph 4.8 requires a replacement element to be no worse than the one it replaces as well as meeting Table 4.2. Paragraph 4.10 gives the heritage exception: where character must be maintained, a centre pane U-value of no more than 1.2 or low-emissivity secondary glazing. Note 9 records that the timber window concession of 1.6 or Band C ended on 14 June 2023. The 2021 edition came into force on 15 June 2022; a 2026 edition exists at https://assets.publishing.service.gov.uk/media/69c122a6cfa346b9d4704a55/ADL1_2026.pdf.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Adding Porch, All You Need To Know About Double Glazing Repairs, Annexe & Granny Flat: Cost, Planning & Rules and 136 more.
- very strong RN-O7TO5H cited
Scottish Government (gov.scot)
SCOTLAND, with no England equivalent: a seller in Scotland must commission a Home Report before marketing, where an England seller commissions nothing and the buyer pays for their own survey. Introduced in 2008 to give buyers and sellers better information on property condition before offers are placed, to stop duplicate surveys and valuations, and to stop artificially low asking prices. The Home Report comprises three documents: an Energy Report, a Property Questionnaire and a Single Survey, and only surveyors registered with or authorised to practise by RICS may produce the Single Survey. It was developed with the Home Report Implementation Group, whose members included RICS, the Law Society of Scotland, the Council of Mortgage Lenders, the National Association of Estate Agents and Citizens Advice Scotland. A five-year review followed a December 2013 consultation and a January 2015 research report.
- very strong RN-JAOQRT cited
The National Archives
what counts as a material change of use, which is a closed list and does not include changing the use of a room inside one dwelling
Cited in Cellar Tanking & Waterproofing.
- very strong RN-HCZJP3 cited
The National Archives
SI 2011/1566 regulation 3, the legal instrument behind the private sewers transfer. It requires the Secretary of State to make a main scheme for the adoption of private sewers and private lateral drains by every sewerage undertaker whose area is wholly or mainly in England, with the Welsh Ministers doing the same for Wales. The vesting date for private sewers and lateral drains (excluding pumping stations) is 1st October 2011; pumping stations vest no later than 1st October 2016. The main scheme catches pipework situated in the undertaker's area which immediately before 1st July 2011 communicated with a public sewer (or, for a lateral drain, with a public sewer vested in that undertaker), excluding exempt sewers and those already subject to a declaration. This is the citation to use instead of a vague 'since 2011' or a bare 'Water Industry Act 1991 (amended)'.
Cited in Blocked Drains: Causes & Clearing Costs.
- very strong RN-TTNQO7 cited
The National Archives
The statutory duty behind 'the water company has to deal with it'. Section 94(1) requires every sewerage undertaker to provide, improve and extend such a system of public sewers, and so to cleanse and maintain those sewers AND ANY LATERAL DRAINS WHICH BELONG TO OR VEST IN THE UNDERTAKER, as to ensure that its area is and continues to be effectually drained, and to make provision for emptying those sewers and dealing with their contents at sewage disposal works. IMPORTANT LIMIT for consumer guidance: section 94(3) makes the duty enforceable by the Secretary of State, or by the Authority (Ofwat) with the Secretary of State's consent or general authorisation - it is not a duty a householder enforces directly, so wording like 'they are legally obliged to attend' overstates it.
Cited in Blocked Drains: Causes & Clearing Costs.
- very strong RN-QBUTY2 cited
The National Archives (legislation.gov.uk)
The exact wording of the two excavation triggers that decide whether a basement or a deep foundation needs a party wall notice, worth quoting rather than paraphrasing. Section 6(1) applies where the building owner proposes to excavate, or excavate for and erect a building or structure, within a distance of 3 metres measured horizontally from any part of a building or structure of an adjoining owner, and the excavation will within those 3 metres extend to a lower level than the level of the bottom of the neighbour's foundations. Section 6(2) applies within 6 metres measured horizontally where the work will within those 6 metres meet a plane drawn downwards in the direction of the excavation at an angle of 45 degrees to the horizontal. Section 6(5) requires the building owner to serve notice on the adjoining owner at least one month before beginning to excavate. Section 6(7) provides that if the adjoining owner does not serve a notice indicating consent within 14 days, they are deemed to have dissented and a dispute has arisen, which is what triggers the surveyor and award process.
Cited in Basement & Cellar Conversions: Cost, Basement Conversion Cost & Feasibility (UK), Bedroom Extension Cost: 2026 UK Price Guide, Building Regs for Loft Conversions: Homeowner Checklist and 20 more.
- very strong RN-XHATOQ cited
The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND, latest revised version with no outstanding effects, and several of these contradict England. Type 20 makes a door, window or rooflight warrant-exempt EVEN WHERE THE FRAME IS REPLACED, so a Scottish window replacement needs no building warrant and no FENSA or Certass notification, unlike England where replacing a window is notifiable building work; it must still meet the regulations, including the 1.4 W/m2K or WER Band B standard. Type 19 exempts open raised external decking unless it is at a height of more than 1.2 metres. Type 21 exempts a paved area or hardstanding unless it exceeds 200 SQUARE METRES or forms part of a required access, a far more generous threshold than England's 5 square metre front garden rule. Type 22 exempts extra-low voltage electrical installations not exceeding 50 volts AC or 120 volts DC. Type 24 exempts like-for-like replacement of fittings including sanitary facilities, rainwater gutters and downpipes, solid fuel appliances, electrical fixtures, ventilation fans and kitchen fitments, but expressly NOT doors, windows or rooflights, nor oil or gas fired boilers. Type 25 exempts like-for-like replacement of flooring, lining, cladding, covering or rendering internally or externally. All are conditional on the work meeting the relevant requirements of the regulations.
Cited in Replacing Misted Double Glazing Units Cost: 2026 UK Price Guide.
- very strong RN-U95SAB cited
The National Archives (legislation.gov.uk), UK Public General Act 1981 c.69
The law behind the advice not to cut hedges or strip ivy and soffits in the nesting season. Section 1(1) makes it an offence to intentionally (a) kill, injure or take any wild bird, (b) take, damage or destroy the nest of any wild bird while that nest is in use or being built, or (c) take or destroy an egg of any wild bird. Section 1(2) creates a possession offence for a live or dead wild bird, any part of or thing derived from one, or an egg or part of an egg. Section 1(5) adds a higher tier of protection for Schedule 1 species, making it an offence to intentionally or recklessly disturb such a bird while it is building a nest or is in, on or near a nest containing eggs or young, or to disturb its dependent young. The prohibition is tied to the nest being in use, not to a fixed calendar window, which is why guidance points at the main March to August season but does not treat it as a safe harbour.
Cited in Garden Maintenance Cost: 2026 UK Price Guide, Hedge Trimming Cost: 2026 UK Price Guide.
- very strong RN-KXCXCY cited
Welsh Government (gov.wales)
WALES. First published 3 April 2017, last updated 7 April 2026. Wales publishes its own Approved Document F, and the page carries the current volume 1 for dwellings (910 KB PDF) and volume 2 for buildings other than dwellings, plus replacement volumes that TAKE EFFECT ON 4 MARCH 2027, the same changeover date as the Welsh Approved Document L and distinct from England's 24 March 2027. Welsh Part F diverged from England's when England issued its 2021 edition alongside Part L and Part O, so extract rates and background ventilator provisions for a Welsh bathroom, kitchen or loft conversion should be taken from this document rather than from England's Approved Document F.
Cited in Trickle Vents & Background Ventilation.
- strong RN-JJCK5N cited
BSI
STATUS: CURRENT. BS 6576:2005+A1:2012, published 16 November 2005 with the A1 amendment in 2012, is the code of practice for diagnosing rising damp in walls of existing buildings and for installing chemical damp-proof courses. It covers chemical treatment of rising damp in solid walls, cavity walls (unfilled or filled) and random rubble-filled walls, and sets out the essential precautions and procedures for installing a chemical DPC. It excludes walls where treatment is inappropriate, such as stud walls, and walls below ground or under hydrostatic pressure, which go to BS 8102. This is the standard to cite for an injected DPC: BS 8215:1991, the code usually quoted, expressly does not cover the installation of chemical DPCs and points here instead.
Cited in Efflorescence & White Staining on Brick.
- strong RN-PSAEIM cited
BSI (British Standards Institution)
STATUS: CURRENT. The live edition is BS 3621:2017+A1:2024, published 26 September 2024, superseding BS 3621:2017, BS 3621:2007+A2:2012, BS 3621:2004, BS 3621:1998 and BS 3621:1980. It specifies performance requirements and test methods for a thief resistant, mechanically operated single point lock assembly (including locking plates, fixing screws, fitting instructions, cylinders and protective furniture) incorporating a lock conforming to BS EN 12209:2016, lockable from both sides by key so that only key egress is possible, for doors, window doors and entrance doors. It explicitly excludes keyless egress assemblies, which are covered by BS 8621, and secure no egress modes, covered by BS 10621. Notes that quote BS 3621 as the insurance benchmark for a front door lock should cite the 2017+A1:2024 edition, not the 2007 one. The BSI catalogue page confirms number, title, date, status and scope; the full requirements are paywalled.
- strong RN-IKHYR0 cited
BSI (British Standards Institution)
The residential fire safety code of practice that professionals use as the alternative to the Approved Document B route, described by BSI as the UK most widely used fire safety standard. Paywalled, so only the catalogue page is public; it confirms the current edition is BS 9991:2024, page-dated 24 September 2025, status Current, and that it superseded BS 9991:2015, which was withdrawn on 21 November 2024, which in turn superseded BS 9991:2011, withdrawn 31 October 2015. Scope for the 2024 edition covers dwellings (single-family houses, self-contained flats or maisonettes), blocks of flats, residential accommodation blocks with individual bedrooms and kitchen or sanitary facilities, specialized housing and care homes. Care homes are new to the 2024 scope: the 2011 edition expressly excluded residential care and nursing homes. The earlier editions confirm the standard applies not only to new buildings but to material alterations, extensions and material changes of use of an existing building, which is why it is cited on loft conversions and flat conversions, and that it complements BS 9999, the equivalent code for non-residential buildings. The 2015 edition renamed sheltered and extra care housing as specialized housing and added expanded recommendations for escape from basements, lifts, power supplies, cluster accommodation and management of additional needs and disabilities.
Cited in PIR vs Mineral Wool Insulation Compared.
- strong RN-2FH5S1 cited
BSI (British Standards Institution)
STATUS: CURRENT. BS EN 13956:2012 was published 31 January 2013, is identical to EN 13956:2012 and supersedes BS EN 13956:2005. It gives the definitions and characteristics for plastic and rubber sheets used for roof waterproofing, specifying the requirements and test methods and providing for evaluation of conformity, with thermoplastic rubber blends and alloys covered and typical materials and applications set out in Annex E. This is the harmonised product standard behind single ply flat roof membranes such as EPDM, TPO and PVC, so it is what a note should cite when it says a single ply membrane is CE or UKCA marked, as distinct from BS EN 13707 for reinforced bitumen membranes and BS 6229 for the design of flat roofs with continuously supported coverings. Catalogue page confirms number, title, date, status and scope; the characteristic tables are paywalled.
Cited in Flat Roof Materials: EPDM vs GRP vs Felt.
- strong RN-DJJNP5 cited
BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 350:2016 was published 31 October 2016, identical to EN 350:2016, ISBN 978 0 580 87895 4, committee B/515. It replaced the two part BS EN 350-1:1994 (principles of testing and classification of natural durability) and BS EN 350-2:1994 (natural durability and treatability of selected European wood species), so a note citing BS EN 350-1 or BS EN 350-2 is citing superseded parts. It gives the methods for determining and classifying the durability of wood and wood based materials against biological wood destroying agents: wood decay fungi, beetles, termites and marine organisms, and it applies to individual wood species, batches, and processed materials including heat treated, preservative treated and modified wood. This is the standard behind the durability class rating quoted for cladding and decking species such as western red cedar, oak and larch. Catalogue page confirms number, title, date, status and scope; the species tables are paywalled.
- strong RN-1J5VD4 cited
FENSA (Fenestration Self-Assessment Scheme)
The competent person scheme that certifies replacement glazing without a building control application, and the certificate a conveyancer will ask for. FENSA covers the replacement of external windows, doors, roof windows and roof lights in the home against the relevant Building Regulations. The certificate confirms compliance with building regulations, shows the installation is energy efficient, ensures the work is registered with the local council, and verifies that the installer's guarantee is insured. It is described as essential when selling the property, which is the practical reason a note should tell readers to keep it. Homeowners who cannot find the original paperwork are directed to contact FENSA. Note the scope limit: FENSA is for replacement work in existing openings, so a new opening or a structural alteration still needs building control.
Cited in Replacing Misted Double Glazing Units Cost: 2026 UK Price Guide.
- strong RN-25YUC4 cited
Royal Institution of Chartered Surveyors
The RICS professional statement that defines the three survey levels a homebuyer is offered, and the standard a note should cite instead of describing surveys loosely. Page updated 17 June 2026. The 1st edition was published in 2019 and became effective in 2021; it sets mandatory requirements for RICS members and regulated firms in the UK delivering residential property surveys, and it replaced and harmonised the earlier RICS residential survey publications. It defines four report products, RICS Home Survey Level 1, Level 2 (survey only), Level 2 (survey and valuation) and Level 3, and a member needs a Home Surveys Licence to produce any of them. The old report formats were permitted only during a transition period from 1 March to 31 August 2021, and the new reports have been mandatory since 1 September 2021. The standard is currently under review: a public consultation on a 2nd edition ran from 19 August to 14 October 2025, informed by a survey of 325 members and a UK consumer survey of over 1,400 homeowners, with proposed changes covering AI and drone or camera-pole technology, greater clarity on survey levels, optional valuation at all levels, guidance for additional risk dwellings, and retrofit assessments. RICS states members should continue to use the 1st edition until the 2nd edition takes full effect, so any note dating the change should say the 2nd edition is not yet in force.
- strong RN-3UXQIL cited
Royal Institution of Chartered Surveyors
The RICS scope table for a Level 1 survey, useful for a note explaining why the cheapest survey misses things. A Level 1 is a visual inspection less extensive than Level 2 or 3, with no tests of building fabric or services, no detailed advice on repairs, and RICS states it is better suited to conventionally built, modern dwellings in satisfactory condition. Concretely: windows are opened at a minimum of one on each elevation; in the roof space the member will NOT remove secured access panels or lift insulation, stored goods or other contents, and inspects only what can be seen from the access hatch; floors are inspected at the surface only with no lifting of carpets, floor coverings or floorboards, no moving of furniture and no hatch lifting or inverted head and shoulders inspection, although a heel-drop deflection test is still done; and inspection chamber covers to drains and septic tanks are NOT lifted. RICS advises the client to consider upgrading to Level 2 or 3 before the service is undertaken if more detailed advice is needed.
- strong RN-BNGAID cited
United Kingdom Accreditation Service
The live UKAS register of accredited bodies currently under sanction. It records the British Board of Agrement under imposed suspension from 26 February 2026 across all four of its accreditations: ISO/IEC 17065 product certification and ISO/IEC 17021 management systems under reference 0113, ISO/IEC 17020 inspection under 4345, and ISO/IEC 17025 testing under 0357. This is the page to check before repeating any advice that treats a BBA certificate as accredited third party assurance.
Cited in Breathable Membranes for Roofs & Walls, Brick Slips & Brick Cladding Systems, Cavity Wall Insulation Materials Compared, Damp Proof Membranes (DPM) & DPC: Types & Installation and 7 more.
- good RN-6QKMKT cited
National Federation of Roofing Contractors
The roofing trade body page that supplies the single most useful threshold for a roof repair note: the 50 per cent rule. Where refurbishment work affects 50 per cent or more of the roof area, the homeowner must either employ a roofing contractor registered with the NFRC Competent Person Scheme or contact Local Authority Building Control, because the roof must then be upgraded to meet the thermal requirements of Part L of the current Building Regulations. That is why a full re-roof costs materially more than a patch repair. NFRC CPS members can self-certify their roofing works without using building inspectors. NFRC is a scheme provider to TrustMark, the UK government endorsed quality scheme for home improvements. It recommends obtaining an Insurance Backed Guarantee, which backs up but is independent of the contractor's own guarantee, since contractors can go out of business. On quotes it advises selecting up to three contractors, getting recommendations from trusted sources, requesting written quotes, not choosing on price alone, and basing the choice on the quality of the advice given and confidence in the contractor.
Cited in The Complete UK Roofing Guide (2026), Slate Roof Tiles: Types, Cost & Lifespan.
- good RN-9T4V37 cited
Property Care Association
The PCA's condensation page, and the citation for the claim that condensation, not rising damp, is the commonest damp problem in UK homes. It states that condensation is the most common form of unwanted dampness in buildings and homes and appears to be increasing as buildings become more airtight and insulated, first showing as beads of water or mould on colder surfaces such as walls or around windows. It attributes the moisture to ordinary activity, naming cooking, showers and baths, washing and drying clothes and breathing, and identifies lack of adequate ventilation as the main reason that moisture becomes a problem, with poor building design, poor thermal performance and occupant behaviour as contributors. On consequences it lists deterioration of decoration, stained curtains, damaged fabrics, decay in window frames, mould on wallpapers and paints in poorly ventilated areas and a damp smell, and states that at its most severe condensation can damage plaster and timber, and that where it occurs under suspended floors it greatly increases the chance of dry or wet rot in floor timbers. It notes condensation is more apparent in winter when external air temperatures are lower.
- good RN-EB3RPE cited
Property Care Association
Names the qualification a homeowner should ask a damp or waterproofing surveyor for, and expands the abbreviation that notes usually leave unexplained. CSSW is the Certificated Surveyor in Structural Waterproofing, described as a nationally recognised professional qualification for individuals diagnosing defects connected to water entering structures below ground level, and the industry benchmark for structural waterproofing professionals. Successful candidates receive the ABBE/PCA Level 3 Certificated Surveyor in Structural Waterproofing, awarded through ABBE, the Awarding Body for the Built Environment. The companion damp and timber qualification is CSTDB, Certificated Surveyor of Timber and Dampness in Buildings, which supersedes the older CSRT; the PCA pages for that one moved and returned 404 on 9 September 2026, so CSRT versus CSTDB still needs checking by hand.
Cited in Basement Conversion Cost & Feasibility (UK), Efflorescence & White Staining on Brick.
- very strong RN-1H8UHK
UK Health Security Agency (UKradon)
Gives a floor-type and concentration decision table for remediation. For a solid floor under 500 Bq per cubic metre the recommended solutions, best first, are a radon sump or positive ventilation; for a solid floor over 500 the answer is a radon sump. For a suspended floor under 500 it is natural under-floor ventilation or positive ventilation; over 500, mechanical under-floor ventilation or natural under-floor ventilation. Warns explicitly that simple actions such as sealing around loft hatches, sealing large openings in floors and extra ventilation do not reduce radon levels on their own, and that completely sealing floors is difficult and can cause rot in wooden floors. Names an active radon sump fitted with a fan as the most effective method, working best under solid floors and under suspended floors where the ground is covered with concrete or a membrane. Advises contacting UKHSA for levels above 1000 Bq per cubic metre, and the local council Environmental Health Department for advice.
- very strong RN-6PQK9U
UK Health Security Agency (UKradon)
UKHSA recommends that radon levels be reduced in homes where the average exceeds 200 becquerels per cubic metre, the Action Level, and states that this recommendation is endorsed by Government. The Action Level refers to the annual average concentration, so a valid measurement uses two detectors, one in a bedroom and one in a living room, left in place for three months to average out short-term fluctuations. Separately defines a Target Level of 100 Bq per cubic metre as the ideal outcome of remediation in existing buildings and of protective measures in new buildings, and advises that where a result falls between the Target and Action Levels action to reduce the level should still be considered, especially where a smoker or ex-smoker lives in the home. Radon is described as a colourless, odourless radioactive gas formed by decay of naturally occurring uranium in rocks and soils.
- very strong RN-JHFWQB
World Health Organization Regional Office for Europe
Published 15 October 2009, ISBN 9789289041737, the health-based benchmark for night-time noise that a soundproofing or acoustic glazing note can cite for what level of quiet is worth achieving. Using Lnight,outside as defined in the Environmental Noise Directive 2002/49/EC, it sets an Lnight,outside of 40 dB as the target of the night noise guideline to protect the public including the most vulnerable groups, named as children, the chronically ill and the elderly. It recommends an Lnight,outside of 55 dB as an interim target for countries that cannot achieve the guideline in the short term and adopt a stepwise approach. The guidelines were agreed by a working group of experts with industry, government and non-governmental stakeholders in December 2006, and extend and update the WHO Guidelines for community noise of 1999.
- very strong RN-BPHKK9
Cadw, Welsh Government
WALES, and it imposes a documentary requirement England does not. A heritage impact statement MUST be submitted with every Welsh listed building consent application alongside detailed plans. Consent is administered by local planning authorities and may be needed for relatively minor work such as replacing an external door, painting or repainting the exterior or interior, or even cleaning. Replacement of traditional windows with UPVC will not normally be acceptable. Routine or like-for-like repairs do not normally need consent, but the criteria are exacting, and demolition always needs consent. Where the authority is minded to grant consent Cadw is normally notified and assesses whether the authority had proper regard to preservation, rather than the merits. The framework is Managing Change to Listed Buildings in Wales, which supplements Planning Policy Wales and Technical Advice Note 24: The Historic Environment, alongside Cadw's Conservation Principles.
- very strong RN-XHXJR2
Cadw, Welsh Government
WALES. It is a criminal offence to demolish, alter or extend a listed building in any way that affects its character as a building of special architectural or historic interest without listed building consent. Like-for-like repairs such as replacing roof slates with the same size and type of slate do not normally need consent, but cleaning stonework or replacing windows is likely to. A certificate of immunity from listing can be applied for from Cadw and prevents listing for FIVE YEARS from issue, during which a local planning authority may not serve a building preservation notice. A building preservation notice protects an unlisted building as if listed for up to six months while Cadw assesses it, with compensation potentially payable for loss caused by interim protection if it is not listed. Delisting proposals are consulted on with the owner, occupier, local planning authority and other interested parties, allowing 28 days for written responses. Authorities can carry out urgent works to preserve a listed building and recover the cost from the owner, issue a repairs notice, and ultimately pursue compulsory purchase.
- very strong RN-D2PRMR
Department for Levelling Up, Housing and Communities and UK Health Security Agency (gov.uk)
The government's own classification of damp types and the single best citation for the point that damp is a building fault, not a housekeeping failure. Damp is defined as the build up of moisture in a property, and four types are named: condensation, where moisture generated inside the home cools and condenses onto colder parts; penetrating damp, where water gets in from outside due to defects; rising damp, where moisture from the ground rises up through parts of the building; and traumatic damp, caused by leaking waste and heating pipes or overflowing baths and sinks. The health effects predominantly affect the airways and lungs and include cough, wheeze, shortness of breath, airway infections including aspergillosis and worsening of asthma, and can cause serious illness and in the most severe cases death. Children, older people, people with pre-existing health conditions or weakened immune systems, pregnant women and people with mental health conditions are most at risk. The guidance states plainly that it is totally unreasonable to blame damp and mould in the home on lifestyle choices. It was written in response to the coroner's report on the death of two-year-old Awaab Ishak in December 2020 from a severe respiratory infection caused by prolonged exposure to damp and mould in his home.
- very strong RN-2PCYXZ
Drinking Water Inspectorate
The regulator's account of lead pipework, useful for any period-property or plumbing note. States that before 1970 lead pipework was commonly used to connect properties to the mains, that its use has since been banned, and that a home built before 1970 may have lead pipes while one built after 1970 is unlikely to. Gives a homeowner identification test at the internal stop tap: unpainted lead appears dull grey, often with a swollen joint next to the tap, and is soft enough that a gentle scrape with a coin shows shiny silver metal beneath, with disposable gloves worn and dust not inhaled; contrasts copper as bright, hard and dull brown, iron as dark, very hard and possibly rusty, and plastic as typically blue, or grey or black if older. Explains that lead dissolves while water stands in the pipe, with concentration depending on standing time, pipe condition, temperature (more dissolves in summer and autumn) and water hardness, since harder water forms a protective scale. Notes that water companies dose with orthophosphate where a risk exists, and that a less common cause is the illegal use of lead-based solder on copper pipe, lead solder remaining permitted only in closed central heating systems. Warns lead accumulates in the body, with infants including unborn babies and children most at risk of effects on mental development, and adults at risk of kidney, heart and circulatory harm.
- very strong RN-ZX4MYZ
GOV.UK
The official route for household pests, and the correction to the assumption that pest control is always a private purchase. It directs the householder to their local council to find out whether it provides pest control services, naming wasps, rats, mice and bedbugs as the pests covered, with a postcode lookup to find the council. The service is available in England and Wales only, so a note aimed at Scottish or Northern Irish readers needs a different signpost. Use it to support the point that councils vary: some treat rats and mice free, others charge, and the decision sits with the local authority rather than a national standard.
- very strong RN-AE0RHQ
Health and Safety Executive
The sheet every other asbestos essentials task sheet tells you to read first, and the right citation for a DIY note that touches pre-2000 fabric. It states that large amounts of asbestos were used in new and refurbished buildings before 2000, that blue (crocidolite) and brown (amosite) asbestos were banned by law in 1985 and manufacture and supply of all asbestos was banned by the end of 1999, and that existing asbestos articles may stay in use until the end of their service life. It names the diseases as mesothelioma, lung cancer and asbestosis, with a latency of 15 to 60 years, incurable and often fatal. It divides the work: higher-risk work with sprayed coatings, loose asbestos, lagging, insulation and asbestos insulating board, apart from some very limited-duration AIB work, requires an HSE-licensed contractor, while the task sheets cover non-licensed work only if done exactly as described. The trades listed as most likely to disturb asbestos include electricians, joiners, plumbers, gas fitters, roofers, plasterers, painters and decorators, which is precisely the DIY work a how-to note describes.
- very strong RN-NPG9NW
Health and Safety Executive
The exact task sheet a note about taking down an old asbestos cement garage or shed roof should cite, because it is the document that defines when the job stays non-licensed. It covers small-scale removal of AC sheets, gutters, drains and ridge caps and dismantling a small structure such as a shed or garage, but only while the AC stays intact: if it starts to break up and creates significant dust the work becomes notifiable non-licensed work under sheet a0. It does not apply to large-scale work or mechanical demolition, which need a full risk assessment and plan of work, and it does not apply where lagging, limpet or insulating board are present, which need an HSE-licensed contractor. It lists the equipment as 500 and 1000 gauge polythene sheeting and duct tape, warning tape and notices, bolt cutter, webbing straps and rope, a garden-type sprayer with wetting agent, a bucket of water and rags, asbestos waste bags, clear polythene bags, a lockable skip for larger quantities and asbestos warning stickers. Two cautions matter for a DIY reader: AC roofs are always fragile and cannot bear weight, and it is dangerous to seal over exhaust vents from gas-fired equipment.
- very strong RN-JHECNL
Health and Safety Executive
The HSE task sheet for the single most common asbestos encounter in a domestic floor: the old thermoplastic or vinyl tile and the black bitumen mastic under it. It states that floor tiles containing asbestos may also have an asbestos-paper backing or be fixed with asbestos-containing mastic, and that removal of floor tiles with an asbestos-paper backing is notifiable non-licensed work (NNLW), which brings a duty to notify the enforcing authority, keep health records and arrange medical examinations. Its first instruction is to consider avoiding removal altogether by overlaying with non-asbestos material, warning the building owner that asbestos material has been covered so it can be managed. Its blunt caution is never sand the floor. Method: restrict access, close doors, tape and notices, adequate lighting; lift tiles whole with a scraper placed in the joint, tapping with a hammer for firmly fixed tiles and using a shovel over large areas to avoid kneeling and breakage; damp down with a garden-type sprayer of wetting agent; clean up with a Class H vacuum to BS 8520 and damp rags, not a domestic vacuum. PPE is disposable hooded overalls, boots without laces and RPE, with companion sheets em4 to em9 for vacuuming, wetting, decontamination and disposal.