Insulation & Membranes
357 sources in the library on insulation & membranes, 19 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 4 of 9.
- supplier figure RN-YH7TV9 cited
SOPREMA UK (Celotex)
Manufacturer product page for the CW4000 partial-fill cavity board. It gives nominal board dimensions of 1200 x 450 mm.
- supplier figure RN-VU7PFR cited
SOPREMA UK (Celotex)
Manufacturer product page on the Celotex site, now run by SOPREMA UK. It confirms GA4000 is now sold as SOPRATHERM GA4000.
Cited in Kingspan & Celotex PIR Boards: Sizes & Cost, PIR vs Mineral Wool Insulation Compared.
- supplier figure RN-5EVKJ2 cited
SOPREMA UK (Celotex)
PIR insulation board with aluminium foil facings on both sides, boards 2400 x 1200 mm. Declared thermal conductivity (lambda D) 0.022 W/mK. Thickness range 50 mm to 100 mm. Compressive strength 140 kPa. BBA Certificate 25/7318 covers pitched roof, dry lining and floor insulation. Fire: SOPRATHERM GA4000 achieves a reaction to fire classification of Euroclass F in accordance with BS EN 13501-1.
Cited in External Wall Insulation (EWI) Systems & Finishes, Floor Insulation Materials & Build-ups, Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-BIRHMA cited
SOPREMA UK (Celotex)
SOPREMA's product page for SOPRATHERM PL4000, the former Celotex PL4000 insulated plasterboard. It gives a PIR core of 0.022 W/mK bonded to 12.5 mm tapered edge plasterboard.
- supplier figure RN-5SDEMT cited
SOPREMA UK (Celotex)
Thermal laminate: rigid PIR core bonded to 12.5 mm tapered edge plasterboard, boards 2400 x 1200 mm. Declared thermal conductivity of the PIR core 0.022 W/mK. Overall thickness range 37.5 mm to 77.5 mm (PIR 25 mm to 65 mm plus 12.5 mm board). BBA Certificate 25/7366 for internal wall dry lining and pitched roof ceiling applications. Fire: SOPRATHERM PL4000 achieves a reaction to fire classification of Euroclass B-s1, d0 in accordance with BS EN 13501-1.
- supplier figure RN-EFHGCE cited
Soundstop
Soundstop product page for SonicScreed acoustic underscreed rubber mat, listing 8 mm and 17 mm rolls with their sizes and prices before VAT. It settles the supply-only cost per square metre of a resilient layer under a floating screed.
Cited in Acoustic Insulation for Floors & Walls.
- supplier figure RN-S7SXLZ cited
Soundstop
Soundstop product page for a 6 mm recycled rubber acoustic underlay in 10 m x 1 m rolls, with its price. It settles the supply-only cost of a basic rubber mat under screed or laminate.
Cited in Acoustic Insulation for Floors & Walls.
- supplier figure RN-5977H4 cited
Stylite (Styrene Packaging and Insulation)
An EPS maker's datasheet tabulating the EWI thickness needed on a 225 mm solid brick wall: 120 mm of EPS70 (0.038 W/mK) or 90 mm of graphite PlusTherm (0.030 W/mK) to reach 0.30 W/m²K.
Cited in Solid Wall Insulation: IWI vs EWI.
- supplier figure RN-TOS2R5 cited
Thermafleece (Eden Renewable Innovations Ltd)
High density sheep wool rich insulation slab, 75% wool with recycled fibres, 20 to 25% recycled content. Density 31 kg/m3. Thermal conductivity 0.035 W/mK. Slabs 1200 mm long in 390 and 590 mm widths, thicknesses 50, 70 and 90 mm with a plus or minus 5 mm tolerance. Published thermal resistance (m2K/W): 50 mm 1.43, 70 mm 2.00, 100 mm 2.86, 140 mm 4.00, 190 mm 5.43, 240 mm 6.86. Fire Classification EuroClass E; flammability and smoulder resistance to BS 5803-4 pass. Vapour resistivity 9 MNs/gm. Specific heat capacity 1800 J/kgK. Water absorption at 100% RH 24% w/w. Sound reduction Rw 41 dB, NRC 1.10 at 90 mm. Dimensional stability to EN 1604 pass, EPD registration S-P-04468. Cradle to gate A1-A3 carbon 0.05 kg CO2e per functional unit. Thermafleece states UltraWool is not suitable for use as a cavity barrier.
Cited in Best Loft Insulation: Materials Compared, Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-2S5Q1T cited
Toolstation
Toolstation category page for draught excluders, listing Stormguard brush pile strip in 10 m rolls with prices including and excluding VAT. It settles the retail price of brush pile draught strip.
- supplier figure RN-V4XRSE cited
Toolstation
A national merchant's product page for a heavier 50 m² breather membrane roll, giving its retail price including VAT; supports the mid-range band of the price table.
Cited in Breathable Membranes for Roofs & Walls.
- supplier figure RN-40WPFQ cited
Toolstation
A national merchant's product page for a 50 m² roll of breathable roofing underlay, giving its retail price including VAT; a single-product supply price check.
Cited in Breathable Membranes for Roofs & Walls.
- supplier figure RN-CP9J9F cited
Toolstation
Toolstation product page for a nine-slab pack of Rockwool RWA45 1200 x 600 x 50 mm acoustic slab, with its price including and excluding VAT. It settles the supply-only price per square metre of a 45 kg/m³ slab.
Cited in Acoustic Insulation for Floors & Walls.
- supplier figure RN-4TS29G cited
Unilin Insulation (formerly Xtratherm)
Rigid extruded polystyrene board, 1250 x 600 mm, thicknesses 30, 40, 50, 60, 80, 100, 120, 140 and 160 mm. Thermal conductivity 0.033 to 0.035 W/mK. Compressive strength CS(10Y) 300 kPa. Reaction to fire: Euroclass E. Published R-values (m2K/W): 30 mm 0.90, 40 mm 1.20, 50 mm 1.50, 60 mm 1.80, 80 mm 2.25, 100 mm 2.85, 120 mm 3.40, 140 mm 4.00, 160 mm 4.25. The range is also available in 500 kPa and 700 kPa grades.
- supplier figure RN-046U8F cited
Wickes
A retailer product page for a 100 mm Kingspan TP10 PIR pitched-roof board. It gives the board size, coverage, declared thermal conductivity and current price.
Cited in Builders' Merchant vs DIY Store: Which Is Cheaper?, How to Get Trade Prices Without a Trade Account, How to Insulate A Vaulted Ceiling In 5 Steps, How to Insulate Garage and 2 more.
- supplier figure RN-4UM20C cited
Wickes
Wickes' product page for a 50 mm Kingspan TP10 PIR board, 2400 x 1200 mm (2.88 m²), at £43 including VAT.
Cited in PIR vs Mineral Wool Insulation Compared.
- supplier figure RN-X5LA77 cited
Wickes
Wickes' product page for a 5.61 m² pack of 200 mm Knauf glass mineral wool top-up loft roll, on offer at £27 (£4.81 per m²) against a usual £40.
Cited in PIR vs Mineral Wool Insulation Compared.
- supplier figure RN-0U6G9D cited
Wickes
Wickes' retail page prices the SuperFOIL garage door insulation kit sold as a 600 mm by 10 m roll for cutting to fit a garage door.
Cited in How to Insulate Garage.
- supplier figure RN-FABSZF cited
Wienerberger UK (Sandtoft)
Wienerberger's technical note on how to comply with BS 5250 roof ventilation. It sets out eaves and ridge openings by pitch, building width, underlay type and insulation position.
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Department of Finance (Northern Ireland)
Northern Ireland's insulation numbers, October 2012 guidance to Part F1. Table 2.2 sets limiting U-values in W per square metre kelvin for a new dwelling as an area-weighted average with a maximum at any point: wall 0.30 average and 0.70 maximum, floor 0.25 and 0.70, roof 0.20 and 0.35, party wall 0.20 and 0.70, windows, roof windows, glazed rooflights, curtain walling and pedestrian doors 2.00 and 3.30, with 3.50 for new thermal elements. Table 3.2 sets the U-values for new thermal elements, which is what applies when an existing floor or roof is replaced or newly constructed during a renovation: wall 0.28, pitched roof with insulation at ceiling level 0.16, pitched roof with insulation at rafter level 0.18, flat roof or roof with integral insulation 0.18, floor 0.22, swimming pool basin walls and floor 0.25. Window U-values may be taken as the smaller of the two standard windows in BS EN 14351-1, the standard configuration in BR 443, or the actual unit size and configuration. Consequential improvement duties apply above 1000 square metres total useful floor area, and the 25 per cent of total useful floor area test defines a material change.
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Department of Finance, Northern Ireland (Building Control NI)
The Northern Ireland U-value standards, which differ from England's Approved Document L and are the figures to quote for an NI reader. Table 2.2 gives limiting U-values for new dwellings in W/m2K as area-weighted averages: wall 0.18, floor 0.18, roof 0.16, party wall 0.00, and windows, roof windows, glazed rooflights, curtain walling and pedestrian doors 1.40. Column (b) sets the maximum U-value at any point: 0.60 for wall, floor and party wall, 0.30 for roof and 3.00 for windows and doors. Where space heating is underfloor heating the maximum floor U-value tightens to 0.15 W/m2K, and that 0.15 still applies even under the whole-building trade-off route in paragraph 2.44. Table 3.2, for new thermal elements in existing dwellings, gives wall 0.28, pitched roof with insulation at ceiling level 0.16, pitched roof with insulation at rafter level 0.18, flat roof or roof with integral insulation 0.18, floor 0.22 and swimming pool basin 0.25. Maximum permissible air permeability is 10 m3/(h.m2) at 50 Pa, with 5 or less expected in practice, and below 3 the booklet says alternatives to natural ventilation should be considered. Roof window and rooflight U-values are quoted as assessed in the vertical position and must be adjusted in accordance with BR 443 where assessed in another plane. Regulation 43 requires that where renovation of a thermal element amounts to more than 50 per cent of its surface area, the whole element is brought up to standard.
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Department of Finance, Northern Ireland (Building Control NI)
Northern Ireland's ventilation guidance, the devolved counterpart to Approved Document F, and a clean source for extract rates because its Table 2.1 sets them out room by room. Intermittent extract minimum rates: kitchen 30 litres per second adjacent to the hob or 60 litres per second elsewhere, utility room 30 litres per second, bathroom 15 litres per second, sanitary accommodation 6 litres per second. Continuous extract minimum high rates: kitchen 13 litres per second, utility room 8, bathroom 8, sanitary accommodation 6. The whole-dwelling ventilation rate should not be less than 0.3 litres per second per square metre of internal floor area, and where a greater level of occupancy is expected an extra 4 litres per second per occupant should be added. It describes System 1, background ventilators with intermittent extract fans, as the common domestic strategy. The 30 versus 60 litres per second split is the figure that decides whether a cooker hood can sit above the hob or must be sized up when placed away from it, for example over an island.
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Home Energy Scotland (Energy Saving Trust, funded by the Scottish Government)
Scotland's own funding route for heat pumps and insulation, which replaces rather than supplements the England and Wales Boiler Upgrade Scheme, so a Scottish reader must be pointed here. Funded by the Scottish Government, it gives homeowners a grant, an interest-free loan, or both. For clean heating systems such as heat pumps and heat network connections the grant is up to 7,500 pounds with a further 7,500 pounds available as an optional interest-free loan. For energy efficiency measures such as insulation the grant covers up to 75 per cent of the combined cost of measures to a maximum of 7,500 pounds, with the remainder available as an interest-free loan. A rural and island uplift of 1,500 pounds applies to both the heating and the energy efficiency grants, so a rural household can claim up to 18,000 pounds in grant funding. Per-measure grant caps are: air, ground or water source heat pumps and heat network connections 7,500 pounds; wood fuelled biomass boilers and eligible stoves 7,500 pounds; solid wall insulation, external or internal, 7,500 pounds; flat roof or room-in-roof insulation 3,000 pounds; loft, cavity and underfloor insulation 1,500 pounds; high heat retention storage heaters 2,500 pounds. Solar thermal (5,000 pounds loan), hybrid solar PV and water heating (5,000 pounds loan), wind turbine and hydro turbine (2,500 pounds loan each), insulated doors and warm air units are loan only with no grant. Eligibility does not depend on receiving benefits, but the property must be an existing home in Scotland that the applicant owns and occupies as their only or primary private residence. Only heat pumps providing 100 per cent of heating and hot water qualify, and hybrid heat pumps are not eligible.
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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-R54RCK
Department for Business and Trade
Published 31 March 2026, last updated 21 August 2026, and applying to England, Scotland and Wales. States that the UK continues to recognise the CE marking alongside or in place of the UKCA marking for the Great Britain market under the Product Safety and Metrology (Amendment) Regulations 2024, so a CE marked product remains lawful to place on the GB market and manufacturers may choose either route. Sets out the UKCA and CE regimes spanning over 20 product types, and the duties of each economic operator: the manufacturer designs and marks the product, applies identification details (name, trade name or trademark and postal address) and retains the technical documentation. Northern Ireland uses CE or CE and UKNI marking instead, and the UKCA marking does not apply in Guernsey, Jersey, the Isle of Man or the British Overseas Territories.
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Department for Energy Security and Net Zero
A closed scheme that still binds new owners, which is a trap for anyone buying a property to renovate. The Green Deal is closed to new applicants, but where a property carries a Green Deal loan the liability travels with the property: whoever moves in is responsible for repaying it, through a charge added to the electricity bill, and can change electricity supplier only to one participating in the scheme. A seller or landlord is legally required to tell a buyer or tenant that a Green Deal loan exists, that they will be responsible for it, and to show them the Energy Performance Certificate before they move in; the EPC states what improvements were made and how much remains to be repaid. Early repayment is possible but may attract extra costs, notified by the company managing the loan. Complaints go to the Green Deal provider first, whose details are on the EPC, or to the DESNZ Green Deal team if the provider has ceased trading; if unresolved within 8 weeks the complaint goes to the Financial Ombudsman Service for mis-selling and other financial issues, or to the Energy Ombudsman for poor installation work or non-disclosure by a seller or landlord.
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Department of Finance (Northern Ireland)
The Northern Ireland index of technical booklets, which take the place of England's Approved Documents under the Building Regulations (Northern Ireland) 2012. Current editions: B materials and workmanship (July 2013), C site preparation and resistance to contaminants and moisture (October 2012), D structure (October 2012), E fire safety (October 2012), F1 conservation of fuel and power in dwellings and F2 in other buildings (both June 2022), G resistance to the passage of sound (October 2012), H stairs, ramps, guarding and protection from impact (October 2012), J solid waste (October 2012), K ventilation (October 2012), L combustion appliances and fuel storage (October 2012), M physical infrastructure for high-speed communications networks (January 2017), N drainage (October 2012), P sanitary appliances, unvented hot water storage and reducing the risk of scalding (October 2012), R access to and use of buildings (October 2012) and V glazing (October 2012). Note for any electrical note: there is no Northern Ireland technical booklet covering electrical safety, so there is no Part P equivalent and no electrical competent person self-certification regime there. Ventilation is Booklet K, drainage Booklet N and glazing Booklet V, not F, H and K as in England.
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Department of Finance (Northern Ireland)
NORTHERN IRELAND, giving a fourth set of U-values distinct from England, Wales and Scotland. Table 2.2 sets limiting area-weighted average U-values in W/m2.K with a maximum permitted at any point in brackets: wall 0.18 (0.60), floor 0.18 (0.60), roof 0.16 (0.30), party wall 0.00 (0.60), and windows, roof windows, glazed rooflights, curtain walling and pedestrian doors 1.40 (3.00). Where the space heating source is underfloor heating the maximum floor U-value tightens to 0.15. Compare Wales at 0.13 for roofs and Scotland at 0.12, against NI's 0.16. Paragraph 2.43 limits the extent of external doors and glazed openings in a dwelling to no more than 25 per cent of the dwelling's floor area, and the limiting air permeability is 10 m3 per hour per square metre at 50 Pa, looser than the Welsh 8.0. U-values are calculated to BRE Report BR 443. A swimming pool basin must achieve not more than 0.25.
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GOV.UK
HUG Phase 2 ran from April 2023 until March 2025, with up to £630 million of grant funding for successful local authorities across the two financial years; local authority applications closed 27 January 2023 after assessment deadlines of 18 November 2022 and 27 January 2023. The page names no successor, so pair it with the Warm Homes: Local Grant page.
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GOV.UK (Ministry of Housing, Communities and Local Government)
The consultation and the published government response that set the direction for Parts L, F and O of the Building Regulations, which is what a note should cite when explaining what is coming rather than what applies today. The consultation ran from December 2023 to March 2024 and sought views on changes to the Building Regulations to improve the energy performance and ventilation standards of new homes and buildings, together with a call for evidence on the overheating standard in Part O. The page carries the consultation outcome, the government response document covering changes to Parts L and F and the Part O call for evidence, and the impact assessments. The response states that where relevant the outcomes will be implemented through a statutory instrument and new approved documents, which is the route by which the 2026 editions of Approved Documents L and F were made.
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Historic Environment Scotland
The most useful of the HES INFORM guides for a retrofit note, because it addresses the failure mode that insulation guides skip. Published 31 August 2020 by Historic Environment Scotland, INFORM Guide, 2.82 MB PDF, audiences Planners and Owners and Conservation and Heritage enthusiasts. Scope stated on the page: the causes and risks of condensation in traditional buildings, how to identify the source of condensation and how to reduce it, with a PARTICULAR FOCUS ON THE RISK OF INCREASED CONDENSATION AFTER THERMAL IMPROVEMENTS. That last point is the citable one: a public body stating that insulating a traditional building can increase condensation risk, which contradicts the common claim that insulation simply cures damp.
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Historic Environment Scotland
A free public-body technical guide on damp in traditional buildings, and the accessible route to heritage-grade damp advice because Historic England blocks scripted fetches. Published 1 July 2007 by Historic Environment Scotland, publication type Technical, Advice and Guidance, INFORM Guide, audiences Planners and Owners and Conservation and Heritage enthusiasts, subjects Architecture and Climate Change, downloadable as a 288 KB PDF from the page. Scope stated on the page: recognising the causes and early signs of damp, and guidance on rectifying damp problems. Use it as the counterweight to damp-proofing sales literature, since HES guidance for solid-walled traditional buildings does not start from the chemical injected damp proof course assumption that dominates UK damp articles. Note the jurisdiction: it is Scottish guidance, so the building science transfers but any regulatory reference does not.
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Historic Environment Scotland
Free HES guidance on how a traditional house was designed to breathe, useful whenever a note explains why blocking air bricks or sealing a chimney causes damp. Published 1 October 2008 by Historic Scotland (now HES), INFORM Guide, 653 KB PDF, audiences Planners and Owners and Conservation and Heritage enthusiasts. Scope stated on the page: the importance of ventilation in a traditionally built structure, then the various ways ventilation is provided, specifically SUB-FLOOR VENTILATION and CHIMNEYS, and issues surrounding masonry walls and plastered surfaces. Cite it alongside Approved Document F when a note covers suspended timber floors, chimney capping or draught-proofing an older house.
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Ministry of Housing, Communities and Local Government
The shortest Approved Document, covering requirement D1 of Schedule 1 to the Building Regulations 2010: if insulating material is inserted into a cavity in a cavity wall, reasonable precautions must be taken to prevent the subsequent permeation of toxic fumes into any part of the building occupied by people. The stated performance is that formaldehyde fumes given off by urea formaldehyde (UF) foams must not reach occupied parts at an irritant concentration, and paragraph 1.1 permits formaldehyde-emitting insulants only where a continuous barrier minimises the passage of fumes to occupiable parts. Paragraph 1.2 sets five conditions for filling a cavity with UF foam: the inner leaf must be masonry (brick or block); suitability must be assessed beforehand to BS 8208-1:1985; the installer must hold or operate under a current Certificate of Registration of Assessed Capability; the material must comply with BS 5617:1985; and installation must follow BS 5618:1985. The 2010 amendments were regulation renumbering only and the 2013 amendments changed only the materials and workmanship guidance, with no change to Part D of Schedule 1.
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Ministry of Housing, Communities and Local Government
The publication page for the conditions a competent person self-certification scheme operator must meet, applying to England, first published 6 June 2012 and last updated 1 April 2016, from which date the conditions bite on any UKAS assessment begun on or after 1 April 2016. Hosts two documents: the main Competent person schemes conditions of authorisation of April 2016, an 8 page PDF of 289 KB, and a separate Building regulations: air tightness testing schemes conditions of authorisation of 5 pages and 141 KB, added 31 July 2014, because air tightness tester schemes carry different requirements from other types of work. Useful for establishing that a competent person scheme is a government-authorised, UKAS-accredited certification body rather than a trade membership list.
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Ministry of Housing, Communities and Local Government
The landing page for Approved Document L, Conservation of fuel and power. Volume 1: Dwellings, 2021 edition incorporating 2023 amendments, took effect 15 June 2022, with transitional cover where a building notice or initial notice was given or full plans deposited before 15 June 2022 and the work started before 15 June 2023. A 2026 edition, retitled Approved Document L: Energy and greenhouse gas emissions, Volume 1: Dwellings, is published on the same page alongside Volume 2 for buildings other than dwellings. Volume 1 was last updated 2 February 2023 and the 2023 amendment removed the primary energy factor as a performance standard for district heat networks and community heating.
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Ministry of Housing, Communities and Local Government
The list of test standards common across product families that UK approved bodies use when assessing construction products, published 27 January 2021 and last updated 21 May 2025, in force from 1 January 2021. Names the specific test methods behind fire performance claims a product data sheet will quote, so a note can verify what a rating actually measures: TS 1187 external fire exposure to roofs; EN ISO 1182 non-combustibility test; EN ISO 1716 gross heat of combustion or calorific value; EN 13823 the single burning item test for building products excluding floorings; EN ISO 11925-2 ignitability under direct flame impingement, the single-flame source test; EN ISO 9239-1 burning behaviour of floorings using a radiant heat source; EN 1365-3 and EN 1365-4 fire resistance of loadbearing beams and columns; EN 1634-1 and EN 1634-3 fire resistance and smoke control for door and shutter assemblies and openable windows; and the EN and ENV 13381 series for applied protection to composite, hollow steel, timber and steel structural members. The latest versions of the standards themselves are on the BSI website.
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Ministry of Housing, Communities and Local Government
The landing page for the 2019 research, published 1 October 2019 and applying to England, hosting the 87 page 3.97 MB report. States the primary aim was to evaluate whether the ventilation provisions recommended in the 2010 edition of Approved Document F provide satisfactory indoor air quality in new homes, with a secondary aim of establishing the extent to which installed systems comply with the minimum ADF provisions. Its headline conclusion is the one to cite: the study found poor indoor air quality in a number of the monitored homes, and failure to meet indoor air quality indicators corresponded in all cases with failure to meet the ADF ventilation recommendations, so the shortfall lay in installation and commissioning rather than in the standard itself.
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Ministry of Housing, Communities and Local Government
An 87 page field study published 1 October 2019 measuring what installed ventilation actually delivers, and its numbers demolish the assumption that a new or upgraded system performs as designed. Of 25 homes visited with continuous mechanical extract, only one met Approved Document F guidance on both extract fan air flow rates and trickle ventilator provision, with whole dwelling extract flow rates in normal low-rate mode ranging from 85 per cent below to 8 per cent above the recommended rate. Only half the homes met the minimum trickle ventilator areas, ranging from 60 per cent below to 107 per cent above the recommended area. On two of three dMEV development sites trickle ventilators had been fitted in the same rooms as the extract fans, contrary to ADF guidance, which can stop fans drawing air through the whole house. On air quality: 11 per cent of the limited monitoring sample had a room where weekly average relative humidity exceeded the recommended monthly average, always the bedroom, and condensation or mould was reported in each such room; 30 per cent exceeded the derived carbon dioxide guideline in the bedroom; and 60 per cent of the detailed monitoring sample exceeded the ADF total volatile organic compound performance standard. Ventilation was found adequate for nitrogen dioxide and carbon monoxide but not for moisture, body odour and VOCs. Notes that Part F 2010 introduced a legal requirement to test and commission installed fans and for the installer to notify the building control body of commissioning and air flow rates.
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Ministry of Housing, Communities and Local Government and Office for Product Safety and Standards
The official list that decides which British and European standards a construction product's declaration of performance must be assessed against, first published 18 December 2020 and last updated 26 September 2025, applying to England, Scotland and Wales. Explains that designated standards support Regulation (EU) No. 305/2011 as amended from time to time, and that together with the horizontal standards on assessment methods they create the common technical language UK approved bodies use when carrying out assessments. Published as a notice of publication dated 26 September 2025, a 51 page PDF, superseding the notice of 1 January 2021 of 53 pages, alongside a consolidated list in ODS format at version 2. This is the reference that turns the standard number cited in a declaration of performance into a check that the right standard was used. A companion page covers horizontal test specifications for construction products.