Structural Work
78 sources in the library on structural work. 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 2 of 2.
- very strong RN-T7W376
The National Archives (legislation.gov.uk), Scottish Statutory Instruments
SCOTLAND. The instrument that sets Scotland's building standards, made under the Building (Scotland) Act 2003, and the reason England's Approved Documents do not apply north of the border. Regulation 3 exempts certain buildings and services, regulation 5 introduces the descriptions of work not requiring a building warrant, regulation 8 covers fitness and durability of materials and workmanship, regulations 9 to 12 set the building standards for construction, demolition, services and conversion, and regulation 16 provides for relaxations. Schedule 1 lists exempted buildings, Schedule 3 the warrant-exempt work and Schedule 5 the mandatory building standards that the Technical Handbooks expand.
- very strong RN-IUO1B2
Welsh Government (gov.wales)
WALES. Most extensions require approval under the Building Regulations in Wales, with a limited set of exempt classes of new building and extension. The guide directs the reader to the separate Welsh quick guides for the elements an extension normally engages: doors and windows, drainage, electrics, external walls, internal walls, kitchens and bathrooms, and roofs. It confirms the Party Wall etc. Act 1996 applies in Wales. Note that a Welsh extension also triggers consequential improvements under regulation 28 as applied by the Welsh Approved Document L, an obligation England reserves for buildings over 1000 square metres.
- very strong RN-2AZXB8
Welsh Government (gov.wales)
WALES. Building regulations approval is required to convert a loft or attic into a liveable space, and the guidance covers houses no more than two storeys high, with more extensive requirements for flats, maisonettes and houses over three storeys. The regulations are applied to ensure the structural strength of the new floor is sufficient, that the stability of the existing roof is not endangered, safe escape from fire, safely designed stairs to the new floor and reasonable sound insulation between the conversion and the rooms below. A liveable space includes a spare bedroom used infrequently. On boarding out for storage, existing ceiling joists tie the pitched roof members together and support the ceiling below and were not designed for significant load, so laying flooring boards over them may itself require a building regulations application, a point an England-based note on loft boarding usually treats as exempt. The Party Wall etc. Act 1996 applies in Wales as it does in England.
- very strong RN-4FI6DR
Welsh Government (gov.wales)
WALES. Published 18 June 2026. New building regulations come into force in Wales on 1 JULY 2026, a different commencement from England's building control reforms, made by the Building (Higher-Risk Buildings Procedures) (Wales) Regulations 2025 and the Building etc. (Amendment) (No. 2) (Wales) Regulations 2025. The first introduces a requirement for approval before higher-risk building work can begin, known as Gateway 2, a building control approval application process, change control and mandatory reporting of safety issues during the work, a completion approval process known as Gateway 3, the golden thread of information, appeal procedures and transitional arrangements. The second sets roles, responsibilities and requirements for dutyholders involved in any controlled building work, so it reaches ordinary domestic projects and not only higher-risk buildings.
- strong RN-4PFJ8L
BRE Group
The catalogue of BRE Digests, Good Building Guides and reports that building professionals cite, with document numbers, authors, dates and prices, which lets a note reference the correct BRE publication rather than BRE in general. Titles include Rising damp in walls: diagnosis and treatment (DG 245, 2007, 15 pounds), Assessment of damage in low-rise buildings with particular reference to progressive foundation movement (DG 251, revised 1995, 15 pounds), Foundation movement and remedial underpinning in low-rise buildings (BR 184, 1991, 35 pounds), Recognising wood rot and insect damage in buildings 3rd edition (BR 453, 2003, 37.50 pounds), Radon: guidance on protective measures for new buildings including supplementary advice for extensions, conversions and refurbishment projects, 2023 edition (75 pounds), Site layout planning for daylight and sunlight: a guide to good practice (BR 209, 2022 edition, 75 pounds, superseding the 2011 edition), External fire spread: building separation and boundary distances (BR 187 2nd edition, 55 pounds) and Wind loads on roof-mounted photovoltaic and solar thermal systems (DG 489, revised 2014, 24 pounds). The BRE U-value Calculator is listed at 0 pounds plus VAT.
- strong RN-AWIY25
BSI (British Standards Institution)
STATUS: WITHDRAWN, and very recently: 27 March 2025. BS 4483:2005 was published 30 September 2005 and specified factory produced, machine welded steel fabric (mesh) sheets for reinforcing concrete, made from ribbed bar to BS 4449:2005 or, for the wrapping fabrics D49 and D98, from wire to BS 4482. It is the standard behind the A142, A193, A252 and A393 mesh references that every concrete slab and driveway note quotes. Because it was withdrawn in March 2025 this is a live correction: notes specifying A142 or A393 mesh to BS 4483 should be checked against the current specification, with product conformity now sitting under BS EN 10080 for weldable reinforcing steel. Catalogue page confirms number, title, publication date, withdrawal date and scope, and names D49 and D98 wrapping fabrics, but does not name the replacement standard.
- strong RN-604BXB
BSI (British Standards Institution)
STATUS: WITHDRAWN on 21 September 2018. BS 5080-1:1993 was published 15 February 1993 and gave the method of test for tensile loading of structural fixings in concrete and masonry, that is the pull out test used to prove wall anchors, remedial wall ties and similar fastenings on site. Its companion BS 5080-2:1986 covered resistance to loading in shear. Because it is withdrawn, a note that specifies pull out testing of remedial wall ties to BS 5080 is quoting a dead standard; current practice for anchor qualification sits with the European Assessment Documents and BS EN 1992-4:2018, Eurocode 2 design of fastenings for use in concrete, with site proof loading commonly to a manufacturer or third party protocol. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name a replacement.
- strong RN-2N8PYB
BSI (British Standards Institution)
STATUS: WITHDRAWN on 29 October 2025, a very recent change. BS 5266-1:2016 was published 31 May 2016 and gave the code of practice for the design, installation and wiring of electrical emergency lighting, covering three purposes: assisting occupants to leave a building in an emergency, protecting those who remain inside, and allowing operations to continue if normal lighting fails, including recommendations for areas with fixed seating. Its scope covers common access routes in blocks of flats but EXCLUDES single family dwellings, a distinction a note should keep when it tells a homeowner that emergency lighting is required. Because it was withdrawn in October 2025, any note citing BS 5266-1:2016 needs checking against the current edition. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
- strong RN-6UNXU6
BSI (British Standards Institution)
STATUS: WITHDRAWN on 24 November 2009. BS 5268-2:2002 was published 14 March 2002 and amended in December 2007 to align with CEN material standards, then withdrawn. It was the permissible stress code of practice for structural timber, glued laminated timber, plywood and other panel products in load bearing members, covering quality, grade stresses, modification factors, nailed, screwed, bolted and glued joints, testing of structural assemblies, and workmanship, treatment, inspection and maintenance. It was superseded by Eurocode 5, BS EN 1995-1-1, which uses limit state design and characteristic values rather than permissible stresses, so any note quoting BS 5268 joist spans or grade stresses is quoting a dead standard and should be corrected to BS EN 1995-1-1 (with the current edition BS EN 1995-1-1:2025 superseding BS EN 1995-1-1:2004+A2:2014). The catalogue page confirms number, title, publication date and the withdrawal date but does not name the superseding standard.
- strong RN-A1LC5G
BSI (British Standards Institution)
STATUS: WITHDRAWN on 30 March 2010. BS 6399-1:1996 was published 15 September 1996, replacing BS 6399-1:1984, and gave the recommendations for dead loads, minimum imposed loads by activity type and vertical loading on protective elements such as barriers, for new buildings and structures, alterations and additions to existing ones, and existing construction on change of use (but not maintenance or replacement without a change of occupancy). The 1996 revision reorganised floor load classes around activity rather than occupancy and clarified reduction of imposed load by building height and loaded area. It was superseded by Eurocode 1, BS EN 1991-1-1:2002 with its UK National Annex, so any note quoting the familiar 1.5 kN/m2 domestic floor load or a loft storage load to BS 6399 is citing a standard withdrawn in 2010 and should cite BS EN 1991-1-1 instead. Note BS 6399-2 (wind) and BS 6399-3 (imposed roof loads, now BS 8683:2021) were part of the same withdrawn family. Catalogue page confirms number, title, dates, withdrawal and scope.
- strong RN-LTB81Q
BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS 8297:2017 was published 31 October 2017 and supersedes BS 8297:2000, which is withdrawn, and BS 8297:1995; note the title also changed, from Code of practice for design and installation of non-loadbearing precast concrete cladding to Design, manufacture and installation of architectural precast concrete cladding, so a note using the old title is quoting a superseded edition. It gives recommendations for architectural precast concrete units used as building cladding, as decorative elements or as permanent formwork, that is units supported by and fixed to a structural frame or wall to perform a cladding role, with particular attention to permanent and temporary movements and tolerances of the supporting structure and to verification of product quality. It excludes glass fibre reinforced concrete (GRC), small masonry units and the design of the supporting structure itself. Catalogue page confirms number, title, date, status, supersession and scope.
- strong RN-NIFJ8S
BSI (British Standards Institution)
STATUS: CURRENT. BS 8485:2015+A1:2019 was published 31 January 2019 and supersedes BS 8485:2015, which is withdrawn. It gives recommendations on ground gas site characterisation, risk assessment and the choice and design of integral gas protective measures to stop methane and carbon dioxide entering new buildings and to provide a safe internal environment, for designers, regulators and constructors. The A1:2019 revision added more detail on interpreting gas monitoring data and assigning the gas screening value, defined four building types with amended gas protection scores for the characteristic situations, added recommendations for reporting protection measures at design, installation and post construction verification stages, and added worked examples. It does NOT cover other hazardous ground gases (radon is separate, under BRE guidance and Approved Document C) nor methane and carbon dioxide arising from the building's intended use. Catalogue page confirms number, title, date, status and scope; the scoring tables are paywalled.
- strong RN-60JOUR
BSI (British Standards Institution)
STATUS: WITHDRAWN on 21 November 2025, superseded by BS 8524-1:2025. BS 8524-1:2013 was published 30 April 2013 and itself replaced PAS 121, which was withdrawn 31 July 2013. It specified requirements for the design, testing and classification of active fire curtain barrier assemblies installed to the recommendations of BS 8524-2, covering reliability and durability, fire resistance, smoke containment and impact resistance of the assemblies, their control devices and ancillary equipment, for curtains of any material. Its two stated functions are maintaining compartmentation against fire and smoke spread, and giving access to escape routes while preserving fire resistance and limiting smoke into protected corridors and shafts. Any note quoting BS 8524-1:2013 or BS 8524-2:2013 is now naming a withdrawn edition and should be updated to the 2025 parts. Catalogue page confirms number, title, publication and withdrawal dates and scope; the requirements are paywalled.
- strong RN-EBSCAK
BSI (British Standards Institution)
STATUS: WITHDRAWN on 29 June 2021, superseded by BS 9251:2021. BS 9251:2014 was published 31 October 2014 and gave recommendations for the design, installation and maintenance of fire sprinkler systems in domestic and residential occupancies, covering components, water supplies, commissioning, testing and modification of existing systems, with the aim of life safety plus property protection and firefighter safety benefits; it records that residential sprinklers can cut the water used to fight a home fire by upwards of 90 per cent. This matters for loft conversion notes, where a sprinkler or misting system is sometimes offered as an alternative to a protected stair: any note citing BS 9251:2014 is quoting a withdrawn edition and should cite BS 9251:2021. Catalogue page confirms number, title, publication date, withdrawal date and scope.
- strong RN-TG59SM
BSI (British Standards Institution)
STATUS: WITHDRAWN on 31 October 2015, superseded by BS 9991:2015 (and since by a further revision). BS 9991:2011 was published 31 December 2011 and itself superseded BS 5588-1:1990. It gave the code of practice for fire safety in residential buildings, covering dwellings, residential accommodation blocks for up to six people and sheltered and extra care housing, applying to new design and to material alterations, extensions and changes of use, across ten sections covering means of escape, stairs, firefighting access, active fire protection, construction, mechanical systems, ancillary accommodation and management. It excludes hotels, caravans, hospitals, care homes, detention facilities, hostels and houses in multiple occupation. This is the standard a loft conversion note reaches for when discussing protected stairs and escape windows, so citing the 2011 edition is citing a withdrawn one. Catalogue page confirms number, title, publication date, withdrawal date, supersession and scope.
- strong RN-XT8DUF
BSI (British Standards Institution)
STATUS: CURRENT. BS 9999:2017 was published 31 January 2017 and supersedes BS 9999:2008, which is withdrawn. It gives the code of practice for fire safety in the design, management and use of buildings, aimed at life safety for occupants and firefighters with property and business protection as secondary objectives. The 2017 revision added a design process flowchart, brought in watermist suppression systems, revised smoke and heat control guidance, added recommendations for fire curtain barriers and updated the shopping complex provisions. Crucially for a home renovation note, it EXCLUDES individual dwellinghouses, and has limited application to specialist buildings such as hospitals and places of lawful detention, so it is the wrong standard to cite for a house: use Approved Document B Volume 1 for dwellings and BS 9991 for residential buildings. Catalogue page confirms number, title, date, status, supersession and scope.
- strong RN-FMD1BX
BSI (British Standards Institution)
STATUS: WITHDRAWN on 31 January 2014. BS EN 1194:1999 was published 15 September 1999 and gave the strength classes for glued laminated timber and the method of determining its characteristic values, covering bending, tensile and compressive strength, modulus of elasticity and density. It is the origin of the GL24, GL28 and GL32 class names, and it has been replaced by BS EN 14080, Timber structures. Glued laminated timber and glued solid timber. Requirements, which now carries both the product requirements and the strength classes. A note specifying a glulam beam to BS EN 1194 is quoting a standard withdrawn in 2014 and should cite BS EN 14080; note also that the class designations changed with the move, with homogeneous and combined layups distinguished as GL28h and GL28c. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
- strong RN-KTG0RI
BSI (British Standards Institution)
STATUS: WITHDRAWN on 30 April 2010, superseded by BS EN 14250:2010. BS EN 14250:2004 was published 6 January 2005 and specified the product requirements for prefabricated structural members such as trusses, beams and girders made of timber and assembled with punched metal plate fasteners, covering materials, strength, reaction to fire, timber sizing, moisture content, dimensional accuracy and joint requirements, plus evaluation of conformity and marking. This is the standard behind the trussed rafter roof that a loft conversion note has to explain cannot simply have its webs cut out, so it matters that the edition cited is current: a note quoting BS EN 14250:2004 is citing a withdrawn one. Design of the trusses themselves sits under BS EN 1995-1-1. Catalogue page confirms number, title, publication date, withdrawal date and scope.
- strong RN-KZE79J
BSI (British Standards Institution)
STATUS: WITHDRAWN on 1 June 2007. BS EN 519:1995 was published 15 October 1995 and set the requirements for machine strength graded structural timber and for the grading machines themselves, covering quality control, test methodology and acceptance criteria. It was superseded by the BS EN 14081 series, Timber structures. Strength graded structural timber with rectangular cross section, whose parts are BS EN 14081-1:2016+A1:2019 general requirements, BS EN 14081-2 machine grading type testing, BS EN 14081-3 machine grading factory production control and BS EN 14081-4. Any note that says timber is machine graded to BS EN 519 is quoting a standard withdrawn in 2007; the machine graded counterpart to visual grading under BS 4978 is now BS EN 14081. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
- strong RN-NW4UCS
BSI (British Standards Institution)
STATUS: WITHDRAWN on 21 September 2022. BS EN ISO 1461:2009 was published 31 July 2009 and superseded BS EN ISO 1461:1999. It specified the properties and test methods for zinc coatings applied by dipping fabricated iron and steel articles in molten zinc, covering the zinc bath, information the purchaser must supply, safety, inspection and sampling, and coating thickness, appearance, adhesion and corrosion resistance. It did not apply to continuously galvanized sheet or wire, mesh, automatic tube and pipe galvanizing, or products with their own standards such as fasteners (BS EN ISO 10684). It has been replaced by the 2022 edition of BS EN ISO 1461, so a note specifying galvanizing to BS EN ISO 1461:2009 is quoting a withdrawn edition and should be undated or cite the current one. Catalogue page confirms number, title, publication date, withdrawal date, what it supersedes and its scope, but does not name the replacement.
- strong RN-2LJB46
BSI (BSI Knowledge catalogue)
Dated 30 November 2011, this is the UK code of practice for the structural design of low-rise housing without recourse to full engineering design. Its scope covers the stability of the structure, site investigation, and the foundations and ground floor slabs used in construction, with foundations comprising strip footings or trench fill in normal ground being the only types described. Notes in the scope state that BS 8103-1 does not cover basement design (though a single level basement providing a firm platform at ground level may allow the standard to be used for the superstructure above), and that proprietary housing systems and timber, steel or concrete framed houses are outside its scope. This is the standard that sits behind the deemed-to-satisfy foundation and stability rules a domestic builder works to.
- strong RN-7E2J2F
BSI (BSI Knowledge catalogue)
Dated 14 March 2005, this gives recommendations for masonry walls above the ground level damp proof course and for walls between ground floor level and the top of foundation level. It applies to low-rise housing of traditional construction comprising detached, semi-detached and terraced houses and flats with not more than four self-contained dwelling units per floor accessible from one staircase, of not more than three storeys above ground and intended for domestic occupation, subject to the limiting conditions stated in the code. It also covers certain small single storey non-residential buildings such as domestic garages and annexes not exceeding 36 square metres in floor area. It is the reference for masonry wall thickness, buttressing and lateral support in ordinary housing without a bespoke engineering design.
- strong RN-GFUBDV
Royal Institution of Chartered Surveyors
The main built-environment alternative dispute resolution provider a homeowner is likely to meet, useful because statutory adjudication under the Housing Grants, Construction and Regeneration Act 1996 does not apply to contracts with a residential occupier, so a homeowner needs a contractual or voluntary route instead. RICS DRS supplies impartial ADR across the property, construction and land sectors as an alternative to litigation, states it has over 40 years of experience and has handled cases worth billions globally, and selects and assesses each panel member for expertise, impartiality and professionalism. Publishes downloadable application forms per service, a searchable panel, and a Conflict Avoidance Process which produces a report with reasoned but non-binding recommendations, intended to head off a dispute before it becomes one. Also runs ADR education through diplomas and distance and face to face programmes.
- strong RN-098KFI
Royal Institution of Chartered Surveyors
The RICS scope table for a Level 3 survey, which lets a note say exactly what the surveyor will and will not do rather than repeating marketing copy. For every level, the member inspects roof space no more than three metres above floor level using a ladder where safe and reasonable. At Level 3 specifically the member enters the roof space and visually inspects the roof structure, lifts small corners of thermal insulation to identify its thickness and type and the nature of the ceiling below, and repositions a small number of lightweight possessions where permission is given; attempts to open all windows where permission, keys and safety allow; lifts the corners of loose and unfitted floor coverings and assesses all floors for excessive deflection by a heel-drop test, carrying out an inverted head and shoulders subfloor inspection and entering the underfloor area where safe; lifts accessible inspection chamber covers to drains and septic tanks and observes the drains in normal use; visually inspects all visible parts of the service systems, operating a sample of lights and extractor fans and asking the occupier to operate the heating; and performs a comprehensive inspection of the grounds. Services are never tested, only observed in normal operation, and the member does not perform or comment on design calculations. Appendices A and B of the Home Survey Standard are the benchmark tables the levels are built from.
- strong RN-N8DL31
Royal Institution of Chartered Surveyors (RICS)
The RICS consumer guide to subsidence, and the source for the figures a homeowner note needs. Subsidence is the downward movement of a buildings foundations caused by changes in the supporting strata, most often shrinkable clay losing moisture in a long dry spell or having water drawn out by trees and bushes, or soil erosion where water from broken pipes softens or washes away sandy, gravelly or chalky ground. RICS cites a Which? estimate that 70 per cent of subsidence claims come from tree roots removing moisture from shrinkable soil. Fewer than 5 per cent of affected properties actually require underpinning, and the Institution of Structural Engineers recommends it be used only as a last resort. Underpinning costs from £10,000 to £75,000 for a typical house and more for larger properties. Alternatives include removing or pruning trees and repairing leaking drains or water mains. RICS advises monitoring cracks for up to 12 months, seeking specialist help immediately if problems appear, checking that insurance covers subsidence, and using RICS members for investigation and claims.
- strong RN-XTSU5N
The Institution of Structural Engineers (IStructE)
The IStructE homeowners guide, Appointing a Structural Engineer for your Domestic Project, first published 2015, ISBN 978-1-906335-28-1, 26 pages. It is written for renovations, extensions and new builds and is the authoritative answer to what a structural engineer does and when one is needed. Chapter 1 introduces structural engineers and the other construction professionals a homeowner meets, and explains that although a builder or trade specialist may offer design services, it is traditional and remains industry standard for a builder to rely on clear technical instructions prepared by independently engaged design professionals. Chapter 2 introduces the relevant regulations, Chapter 3 gives advice tailored to specific project scenarios and Chapter 4 covers engaging a structural engineer. It notes IStructE is incorporated by Royal Charter with rigorous entrance examinations and mandatory continuing professional development, and warns that rules differ between England and Wales, Scotland and Northern Ireland.
- good RN-1QXTQO
Brick Development Association
BDA structural guide last updated March 2023, from the body whose members account for almost 99 per cent of bricks produced in the UK. It states around 20 per cent of the UK housing stock is more than 100 years old and mostly built of brick. It sets a strict repair sequence: survey first to establish whether the structure is stable and identify defects, then establish the cause (mainly foundations, overloading or unwanted water), then decide remedial measures, and only then consider appearance. The survey is in two parts, accurate drawings (now often by drone or 3D laser scan) and a structural and dilapidations survey using pin type tell-tales rather than strips so movement can be measured. On major alterations it warns that removing loadbearing walls redistributes loading and must be designed by a competent person, that removing internal cross walls can destabilise the external walls they tied, and that solutions include piers, a new loadbearing wall alongside, or transferring load to an independent frame, each of which may need new foundations. On openings it warns that widening concentrates load, and that for openings near a wall junction or chimney breast the lintel should be lengthened to tie into the cross wall or chimney breast, possibly with a matching tie at the threshold. On chimney breasts it states removal should only be considered if acceptable structurally because the heavy mass of brickwork is often providing stability, and that sealed flues need ventilation such as an air brick high in the breast and near the top of the stack to avoid condensation. Later sections cover pointing, matching bricks, foundation failure, leaning and bulging walls, cracking, overloading, failures of bricks and water penetration.
- good RN-NWBGX4
CIRIA (Construction Industry Research and Information Association)
The reference for what happens when an excavation goes below the water table, which is the hidden cost driver in basement digs and deep foundations on wet ground. CIRIA C750, Groundwater control: design and practice, second edition, published April 2016, 205 pages, ISBN 978-0-86017-755-5, authors Preene, Roberts and Powrie. Paywalled at GBP 110 excluding VAT (GBP 55 for members) with a minimum order of five copies, so only the catalogue page and a PDF excerpt are public. The page states the core proposition plainly: whenever an excavation is made below the water table there is a risk that it will become unstable or flood unless measures are taken to control groundwater in the surrounding soil. Scope covers the potential effect of groundwater on construction works, groundwater control and dewatering techniques as temporary works, safety management and contractual matters, legal and environmental issues, site investigation requirements, and design methods for groundwater control schemes.
- good RN-BTTT08
CIRIA (Construction Industry Research and Information Association)
The standard reference a structural engineer uses to design an embedded retaining wall, which is what a basement dig or a deep terraced garden retaining structure actually needs. CIRIA C760, Guidance on embedded retaining wall design, published February 2017, 471 pages, ISBN 978-0-86017-764-7, authors Gaba, Hardy, Doughty, Powrie and Selemetas. It is paywalled at GBP 170 excluding VAT (GBP 85 for members) with a minimum order of five copies, so only the catalogue page and a PDF excerpt are public. Scope confirmed on the page: selection and design of VERTICAL EMBEDDED retaining walls to satisfy the Eurocodes, covering temporary and permanent cantilever, anchored, single-propped and multi-propped walls embedded in soft soils, stiff clays, other competent soils and soft rocks. The page also states it clarifies areas of ambiguity and common misunderstandings in applying the Eurocodes to embedded retaining walls and sets out an unambiguous method for applying the Observational Method. Note the scope limit: this is not the reference for a low garden gravity or masonry retaining wall.
- good RN-137MQM
Property Care Association (PCA)
The Property Care Association guide to remedial structural repair, useful as the trade-body counterweight to the assumption that movement means underpinning. It describes crack stitching using profiled stainless steel bars set in resin grout as an effective repair for stone, concrete and brick structures, and lateral restraint systems among the methods for resolving structural problems caused by impact, water ingress or poor building practice. On cavity wall tie corrosion it states new stainless steel ties can be installed either resin fixed or mechanically fixed into the walls, and that defective ties may be isolated, removed or in some circumstances left in place. On underpinning it says the technique was traditionally used but is now less preferred because it is a long and costly process that often required large scale excavations, and that ground stabilisation using injected materials and remedial ground piles now offer lower impact solutions for foundation movement and subsidence. It stresses that structural engineers must supervise repair work so the diagnosis and the solution are correct.
- good RN-9GR88V
SCI and BCSA (steelconstruction.info)
Describes the hot rolled open sections used in UK construction: universal beams (UB), universal columns (UC), parallel flange channels (PFC), equal and unequal angles, and circular, square and rectangular structural hollow sections. Sections are designated by a serial size (nominal section depth and flange width) plus a weight per metre, which is why a beam is quoted as, for example, 203 x 133 x 25 UB. Dimensions for UB, UC and PFC are given in BS EN 10365, angles in BS EN 10056, and design and detailing dimensions in SCI publication P363 (the Blue Book). Hot rolled open sections are produced in lengths up to about 25 m, and S355 is the grade most commonly used in construction.
- good RN-2G86BS
SCI and BCSA (steelconstruction.info)
The Blue Book, SCI publication P363, is the standard UK source of steel section property data and member resistance tables used to select a beam or column quickly. It covers hot rolled open sections (beams, columns, channels and angles) and hollow sections, plus resistance data for bolts and welds. The latest printed edition gives resistances for grades S275 and S355, while the interactive online version extends to S460 for open sections and further grades for hollow sections. The current edition tables comply with the UK version of Eurocode 3 parts 1-1, 1-5 and 1-8 with their UK National Annexes, and the interactive version also carries design information to the superseded BS 5950. This is where a stated capacity for, say, a 203 x 133 x 25 UB comes from.
- good RN-FITI8H
The Concrete Society
The index to the Concrete Society technical library and the place to check a concrete claim against an industry-independent source. Four publication families are listed: Technical Reports giving in-depth guidance on design, construction, maintenance and innovation (for example TR43, Post-tensioned concrete floors design handbook, at GBP 85 full price and GBP 51 to members, and Discussion Document DD51 on calcined clay as a supplementary cementitious material, free to all); Good Concrete Guides on practical aspects (GCG8, Concrete practice, and GCG11, Digital monitoring and measurement of fresh concrete); Advice Sheets on specific topics such as no-fines concrete and brushed and tamped surface finishes; and Fingertips, short free reference pages covering masonry densities, cold joints, consistence tolerance and the slump test, floated and trowelled finishes, core testing for compressive strength, delamination of concrete floor surfaces and hot weather concreting. The Society also runs an advisory service of engineers and concrete technologists giving impartial advice to members, including desk studies and site visits. The Fingertips pages are the freely readable part and carry real figures; the Technical Reports are mostly paid.
- good RN-8TA2LQ
The Concrete Society
A free, citable data sheet giving the density ranges a note needs when explaining block types or estimating dead load. Published 3 June 2025 and filed under Buildings, Domestic (low rise). Dense aggregate blocks have a density in the range 1,800 to 2,100 kg/m3. Lightweight aggregate blocks, also called medium dense, are in the range 650 to 1,500 kg/m3. Aircrete blocks are in the range 400 to 900 kg/m3. Concrete bricks are 1,900 to 2,100 kg/m3 for Commons, Facing and Engineering quality, and 1,400 kg/m3 for lightweight bricks. The sheet points onward to the Concrete Block Association and the Autoclaved Aerated Concrete Products Association for more detail.
- fair RN-Y3THH4
Financial Ombudsman Service
The ombudsman's own account of what it sees and how it decides, last updated 24 July 2023, which is a stronger citation than an insurer's marketing page. Confirms that buildings insurance typically responds to accidental damage, weather such as storms, flooding, ground movement such as subsidence, and underground pipes made from pitch fibre. Lists the recurring complaint types: repairs done but the problem not fixed; the insurer insisting on repair where the consumer wants replacement; the insurer deciding the sum insured on buildings or contents is not enough to cover the claim, which it names as underinsurance; the insurer saying the customer carelessly or deliberately failed to give the true rebuild cost of the home or replacement cost of contents and cancelling the policy on that basis; a replacement offered that is not the same as what was lost; and a cash settlement too small to have the repairs done. Links its separate approaches to accidental damage, building warranties, damage to underground pipes, flood damage, gradual damage, home emergency insurance and multiple-occupancy buildings insurance.
- fair RN-BSNXU2
Financial Ombudsman Service
Sets out what happens when an insurer says a homeowner gave wrong information, which is the mechanism behind most declined renovation-related claims, last updated 10 July 2026. Defines misrepresentation as information given carelessly, deliberately or recklessly that was incomplete or misleading, and non-disclosure as leaving out relevant information that was asked about. Lists the insurer's possible remedies: charge more for the policy, retrospectively apply a restriction so an ongoing or future claim is declined, settle a claim proportionately, or avoid the policy so the claim is declined outright. States the legal test the ombudsman applies is the insurer's obligations under the Consumer Insurance (Disclosure and Representations) Act 2012, asking whether the questions were clear and specific, whether the consumer took reasonable care to answer correctly, whether the answer was incorrect or incomplete, and whether the insurer would have acted differently with the correct information. Confirms the complaint route: complain to the firm first, and if it does not send a final response letter within eight weeks, or the response is unsatisfactory, bring the complaint to the ombudsman, whose service is free.
- fair RN-JGN095
Financial Ombudsman Service
Explains the average clause, the mechanism that reduces a payout when a home is insured for less than its rebuild cost, last updated 10 July 2026. States that where a policy contains an average clause the insurer may use it so that the policyholder bears a proportion of any loss or damage if the item was insured for less than its replacement value, and that the insurer applies its own formula. Identifies the two grounds on which the ombudsman upholds such complaints: the insurer tried to apply an average clause that is not actually in the policy, and the insurer applied the average clause without ever having asked the consumer to estimate the full value of the buildings or contents. Also covers complaints where the insurer failed to ask the right question, giving the example of an application asking how much cover do you need when what the insurer wanted was the total value of everything in the home, and where the insurer did not make clear that pre-filled parts of an online form had to be checked for accuracy. Confirms the complaint route requires a formal complaint to the firm first, with the ombudsman available if no final response arrives within eight weeks.
- fair RN-2A8QZI
Northern Ireland Water
NORTHERN IRELAND. NI Water requires a Building Over or Near a Public Sewer Agreement, and its conditions go beyond the England build-over agreement. Drawings must be at a scale of 1:100 or greater and colour code existing public sewers, foul in red, storm in green and combined in magenta, with private drainage in black, plus longitudinal sections showing pipe size, gradient, material, manholes and invert and cover levels to Ordnance Datum Belfast. Where building over the sewer, ONLY SUSPENDED CONCRETE FLOORS are permissible if a concrete floor is proposed. A method statement is required whether or not the pipe is being replaced, and NI Water may require a Structural Engineer's Report at the developer's expense. Critically, where there is any loan or mortgage on the property the LENDER MUST SIGN the agreement before it is returned, and the applicant must hold and provide current home insurance including buildings cover. No work may start until the agreement is authorised and returned. Applications are triaged before payment is requested, and third and subsequent applications on the same sewer leg attract a discount under the Scheme of Charges.