Loft Storage
68 sources in the library on loft storage, 40 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 2.
- very strong RN-5338K3 cited
GOV.UK
The government's own recommendation tool, and the neutral link a DIY insulation note should offer instead of a comparison site. It gives personalised home improvement recommendations for property owners in England and Wales, and for each suggestion shows an estimated cost of making the improvement and how much could be saved on bills. It cross-refers to the Boiler Upgrade Scheme, the Warm Home Discount Scheme and the Winter Fuel Payment. A telephone helpline is available Monday to Friday 8am to 6pm except bank holidays, and Saturday 9am to 12pm. The page itself carries no eligibility criteria or scheme figures, so a note quoting grant values must cite the individual scheme pages rather than this one.
Cited in All You Need To Know About Double Glazing Repairs, Fan Assisted Radiators Cost: 2026 UK Price Guide, How to Insulate a Loft (DIY), Insulation Grants 2026: ECO4, GBIS & What You Can Get and 5 more.
- very strong RN-NUBKZ8 cited
Ministry of Housing, Communities and Local Government
The 2026 edition of Approved Document F Volume 1, supporting Requirement F1 and regulations 39, 40C, 42 and 44. It takes effect on 24 March 2027 in England for building work not connected with higher-risk building work, and on 24 September 2027 for work in connection with higher-risk building work, with transitional arrangements in Circular Letter 01/2026. The extract rates are unchanged from the 2021 edition: paragraph 1.13 requires extract to outside in kitchens, utility rooms, bathrooms and sanitary accommodation, and Table 1.1 keeps 30 l/s for a kitchen with a cooker hood extracting outside, 60 l/s where there is no hood or the hood does not extract outside, and 30 l/s for a utility room. Paragraph 1.16 keeps extract terminals within 400 mm of the ceiling and 1.17 keeps the cooker hood 650 to 750 mm above the hob. Paragraph 1.11 states background ventilator sizes are given as an equivalent area in mm2, not free area, measured to BS EN 13141-1, and 1.12 requires that equivalent area to be marked visibly from inside.
Cited in Trickle Vents & Background Ventilation.
- very strong RN-X4J5YY cited
Ministry of Housing, Communities and Local Government
The 2026 edition takes effect on 24 March 2027 for work not connected with higher-risk building work, and 24 September 2027 where it is, with transitional arrangements in Circular Letter 01/2026. Table 3.1 sets limiting U-values for new dwellings: all roof types 0.16, wall 0.26, floor 0.18, window 1.6, rooflight 2.2, doors 1.6 W per square metre per kelvin, with air permeability 8.0 cubic metres per hour per square metre at 50Pa. Table 3.2 covers new elements in existing dwellings, that is extensions and loft conversions: roof 0.15, wall 0.18, floor 0.18, window 1.4 or Window Energy Rating Band B, rooflight 2.2. Table 3.3 covers upgrading existing elements: a roof with a U-value worse than the 0.35 threshold must be improved to 0.16, and note 2 confirms that for dormer windows the roof figure covers the roof parts and the wall figure the cheeks, while note 3 allows a higher U-value where the standard would limit head room provided the insulation plus air gap is at least the depth of the rafters.
Cited in External Wall Insulation (EWI) Systems & Finishes, Insulation: The Complete Guide, Triple Glazing: Worth the Cost?.
- very strong RN-Z6AXUW cited
Ministry of Housing, Communities and Local Government (GOV.UK)
The full Approved Document A PDF, which carries the deemed-to-satisfy tables a domestic project is checked against. Section 2E covers foundations of plain concrete: paragraph 2E3 gives the recommended minimum widths of strip foundations in Table 10, keyed to ground type and total load of loadbearing walling per linear metre. Table 10 sets, for rock (not inferior to sandstone, limestone or firm chalk, requiring at least a pneumatic or mechanically operated pick to excavate), a width equal to the width of the wall at every load. For medium dense gravel or sand (requires a pick to excavate, a 50mm square wooden peg hard to drive beyond 150mm) and for stiff clay or stiff sandy clay (can be indented slightly by the thumb), the minimum widths are 250mm at 20 kN per linear metre, 300mm at 30, 400mm at 40, 500mm at 50, 600mm at 60 and 650mm at 70. Firm clay and firm sandy clay (thumb makes an impression easily) start at 300mm. The document also covers minimum depth of strip foundations, wall thickness rules for residential buildings up to three storeys (paragraph 2C10 covers internal loadbearing walls in brickwork or blockwork), buttressing, lateral support by floors and at roof level, interruption of lateral support, wall cladding in Section 3, and Section 5 on reducing sensitivity to disproportionate collapse with the building consequence classes.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Annexe & Granny Flat: Cost, Planning & Rules, Bathroom Storage Solutions, Bricklaying Bonds & UK Brick Sizes and 48 more.
- very strong RN-FPPUSL cited
Ofgem
ECO4 is the fourth phase of the Energy Company Obligation across Great Britain. It applies to measures installed from 1 April 2022 and runs until 31 December 2026 following a nine-month extension; ECO3 closed on 31 March 2022 and ECO4 came into force in July 2022. The scheme places a Home Heating Cost Reduction Obligation on medium and large energy suppliers to promote measures that improve the ability of low-income, fuel-poor and vulnerable households to heat their homes, funding insulation and heating upgrades for both homeowners and tenants. Ofgem also lists the Great British Insulation Scheme as a separate obligation on this page.
Cited in All You Need To Know About Double Glazing Repairs, Best Loft Insulation: Materials Compared, Boiler Upgrade Scheme & Heating Grants 2026, Cavity Wall Insulation Materials Compared and 19 more.
- very strong RN-5AEX1Y cited
Ofgem
Ofgem's ECO page for local authorities. It explains ECO4 Flex, the referral route that lets councils widen ECO4 eligibility to reach low-income households outside the standard criteria.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- very strong RN-RDOIJR cited
Ofgem
The scheme, formerly known as ECO+, ran from April 2023 to 31 March 2026 and is now closed. It obliged medium and large energy suppliers to deliver measures reducing energy use in the least energy-efficient homes in Great Britain. Eligibility was homes with an EPC rating of D to G in Council Tax bands A to D in England, or A to E in Scotland and Wales, plus low-income and vulnerable households. Unlike ECO4, which funds whole-house packages, GBIS mostly delivered a single insulation measure per home. This is the page to cite when a note has to say a grant route has closed rather than leave a reader chasing it.
Cited in Best Loft Insulation: Materials Compared, Boiler Upgrade Scheme & Heating Grants 2026, Electric Heating Options Compared, EPC Ratings Explained & How to Improve Yours and 17 more.
- very strong RN-G28L1V cited
Welsh Government
The Welsh Part K, and the clearest statement of when a loft may be reached by something other than a normal stair. The maximum pitch for a private stair is 42 degrees, and where a floor of the building is less than 100 square metres the going may be reduced to 250 mm. Paragraph 1.10 sets headroom at 2 m on the access between levels, and for loft conversions where that is impossible, 1.9 m measured at the centre of the stair width reducing to 1.8 m at the side is satisfactory. Paragraph 1.11 gives no minimum stair width, deferring to Part B for escape and Part M for disabled access. Paragraph 1.23 allows an alternating tread stair only in one or more straight flights, only for a loft conversion, only where there is not enough space for a conforming stair, and only for access to one habitable room, together if desired with a bathroom or WC, provided that WC is not the only one in the dwelling. Paragraph 1.24 requires uniform steps with parallel nosings, handrails both sides, slip resistant treads, and over the wider part of the step a maximum rise of 220 mm and minimum going of 220 mm. Paragraph 1.25 permits a fixed ladder with fixed handrails both sides on the same conditions, serving one habitable room only, and states plainly that retractable ladders are not acceptable for means of escape.
Cited in Staircase Types & Costs: Straight, Winder & Spiral.
- strong RN-7I87AN cited
BRE
The government energy-rating method's Table 16 of roof U-values by loft insulation thickness: 0.40 W/m²K for 100 mm at the joists and 0.16 for 270 mm; it replaces the unsourced 0.8 figure.
Cited in Raised Loft Boarding & Loft Legs: Why They Matter, Room-by-Room Radiator Sizing.
- strong RN-DVFEWE cited
BSI
BS 5250:2021, published 31 July 2021, is the current code of practice for managing moisture in buildings and the reference for cold roof and warm roof condensation risk, roof void ventilation and the choice between high resistance and low resistance underlays. It replaced the earlier condensation code of practice and is the standard the NFRC and the Approved Documents point to when a note discusses interstitial condensation in a loft or a boarded roof.
Cited in Fascias, Soffits & Bargeboards Explained, Roof Tiles & Slates: Coverage, Fixings & Ventilation.
- strong RN-YH4485 cited
BSI
Published 28 February 2007 and still current though under review, this is the product standard a loft ladder should be marked to. It specifies terms and definitions, product requirements and test methods for the construction and performance of loft ladders, covering climbing angle, handrail construction, anti-slip surfaces, rung or tread spacing, width between side supports, safe distances from the floor and the trapdoor, operability including upward pressure and controlled descent, feet design and prevention of unintentional opening. Its test regime covers static load, cyclic fatigue, rung and tread torsion and bending, handrail performance and ladder stops, and it sets the maximum load, marking and user instruction requirements, so a buying guide can point to the marked maximum load rather than a supplier's claim.
Cited in How to Fit a Loft Ladder, Loft Ladders Buying Guide: Types, Fitting & Cost.
- strong RN-R76O44 cited
BSI (BSI Knowledge catalogue)
The span-table code that tells you whether the joists already in your loft can take a floor, and it is the standard a building control officer will reach for. Published 30 November 2009, current, replacing BS 8103-3:1996. It gives recommendations for the sizes of timber elements, fixings and their connections with masonry walls, floors and roofs for detached, semi-detached and terraced houses and flats of not more than three storeys above ground. Its stated limits of application include: joists and rafters at centres not exceeding 600 mm; maximum clear span of any floor joist or flat roof joist 6.0 m; maximum clear span of a pitched roof 12.0 m imposing not more than 12 kN per metre run on the perimeter walls; roof area not more than 200 square metres on plan; no part of wall or roof higher than 15 m above lowest adjacent ground. It contains a clause on spans, sizes and spacings for solid timber members, notching, drilling and end-trimming, plus normative Annex A on maximum moisture content at time of fixing and Annex I on fixing of flooring. Proprietary systems, timber frame and steel or concrete frames are outside its scope.
Cited in Structural Materials: The Complete Guide, Suspended Timber Floors: Joists, Boards & Ventilation.
- strong RN-ZGS3SN cited
TrustMark
TrustMark is the government endorsed quality scheme for work in and around the home, endorsed by the Department for Energy Security and Net Zero and the Department for Business and Trade. It vets registered businesses against required standards and holds ISO 9001, ISO 27001 and Cyber Essentials accreditation. Registration is the marker to check for grant-funded energy efficiency work, so a note about a subsidised loft insulation installer should point readers here rather than to a lead generation directory.
Cited in How to Find & Vet a Good Builder, How to Get & Compare Building Quotes, Insulation: The Complete Guide, Project Managing Your Own Renovation and 2 more.
- fair RN-9MX1CZ cited
Centre for Sustainable Energy
Consumer advice from the Centre for Sustainable Energy, an energy charity, drawing on Energy Saving Trust figures. It gives 270 mm as the recommended depth for mineral wool loft insulation.
Cited in Best Loft Insulation: Materials Compared.
- fair RN-UBB7IB cited
Energy Saving Trust
The Energy Saving Trust's consumer guide to loft insulation. On boarding a loft, it warns that squashing mineral wool under boards reduces its effectiveness as an insulator.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- fair RN-JC2HEO cited
LABC Front Door
LABC's homeowner guide to roof and loft insulation. It recommends at least 270 mm of mineral wool, says squashing it under boards reduces its insulation value, and advises flooring on raised legs.
- fair RN-WLOT6Z cited
LABC Warranty
A new-home warranty provider's technical guidance on domestic floor decks; it explains that the P5 and P7 particleboard grades describe adhesive moisture resistance, not waterproofing.
- fair RN-J9EO63 cited
Nationwide Building Society
Nationwide's 2023 house price index research on home improvements; it estimates a loft conversion adding a double bedroom and bathroom can add up to 25% to a three-bed, one-bath house.
Cited in Bedroom Extension Cost: 2026 UK Price Guide, Double / Two-Storey Extension Cost & Guide, Garage Conversion to a Bedroom: Cost & Rules, House Extension: The Complete Guide and 2 more.
- supplier figure RN-GGK1VO cited
B&Q
B&Q's product page for a pack of three 1,220 × 320 × 18 mm chipboard loft panels, priced at £16.47, which it states as £14.06 per m².
- supplier figure RN-4BSMF3 cited
CIUR (UK) Ltd (Warmcel)
The maker's technical data summary for Warmcel, the main UK blown cellulose loft insulation, gives a thermal conductivity of 0.038 W/mK, the lower end of the blown-fibre range given.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-LTTJ9R cited
DIY Building Supplies
A building supplies retailer's product page for one 15 m² roll of YBS SuperQuilt Lite multifoil, showing the price including VAT and per square metre.
Cited in Best Loft Insulation: Materials Compared.
- supplier figure RN-5ME01B cited
FAKRO
The manufacturer's product page for its fire-resistant loft ladders; it lists fire-rated hatch-and-ladder units with EI 60 and EI 120 classifications. Used only for product facts.
Cited in Loft Hatch Guide: Sizes, Fire-Rated Hatches & How to Fit One.
- supplier figure RN-VU16KW cited
FAKRO
FAKRO's product page for its metal loft ladders, including the folding LMS and LMK and the telescopic LML Lux, gives each a 200 kg maximum loading.
- supplier figure RN-IUAMCD cited
FAKRO
The manufacturer's product page for its highly insulated loft ladders; it states a hatch U-value of 0.51 W/m2K and an 8 cm hatch for the LWT. Used only for product facts.
Cited in Loft Hatch Guide: Sizes, Fire-Rated Hatches & How to Fit One.
- supplier figure RN-8G4P1P cited
FAKRO
FAKRO's product page for its wooden folding loft ladders (LWK Komfort, LWL Extra, LWZ Plus, LDK and others) gives each a 160 kg maximum loading and EN 14975 compliance.
- supplier figure RN-KJDWCX cited
Insulation Shop
An insulation merchant's product page for Thermafleece CosyWool sheep's wool loft roll, 100 mm thick. It gives a price of £15.72 per m² including VAT, so about £16 per m² per 100 mm layer.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-N59WHD cited
Insulation UK
An insulation merchant's product page for one pack of 100 mm Thermafleece CosyWool sheep wool roll. It shows the pack coverage of 7.22 m² and the price including VAT.
Cited in Best Loft Insulation: Materials Compared.
- supplier figure RN-05RWCM cited
Insulation UK
An insulation merchant's product page for one roll of YBS SuperQuilt multifoil. It repeats the maker's claim of performance equal to up to 130 mm of mineral wool at 40 mm thick, and shows the price including VAT.
Cited in Best Loft Insulation: Materials Compared.
- supplier figure RN-K87XN6 cited
Jewson
A national builders' merchant's product page for a standard tongue-and-groove chipboard loft panel; it confirms the 1,220 x 320 x 18 mm size. Used only for the product dimension.
- supplier figure RN-97UXGB cited
Klober
A roof ventilation maker's page for its roll-out rafter (eaves) tray. It says the tray stops loft insulation being pushed against the underlay and keeps a clear ventilation path into the roof void from the eaves.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-CJKFP3 cited
Knauf Insulation
Knauf's product page for FrameTherm Roll 32, a glass mineral wool roll. It states a lambda of 0.032 W/mK, the best in the maker's glass wool range, which sets the lower bound used in the sentence.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-EQOVZB cited
Knauf Insulation
Knauf Insulation's product page for Loft Roll 44 glass mineral wool. It gives the declared thermal conductivity of 0.044 W/mK and the Euroclass A1 non-combustible fire rating.
Cited in Best Loft Insulation: Materials Compared.
- supplier figure RN-9G2W2U cited
Knauf Insulation (EPD S-P-01755, hosted by SIG)
Knauf Insulation's EPD for its Supafil glass mineral blowing wools lists Supafil Loft 045 at 0.045 W/mK, the upper end of the blown-fibre range given.
Cited in Loft Insulation Guide: Types, Costs & Recommended Depth.
- supplier figure RN-WSV626 cited
Loft Leg Ltd
The maker's installation FAQ for Loft Legs. It sets legs at no more than 600 mm centres, with legs where boards meet, and a 320 mm grid for 320 mm wide boards.
- supplier figure RN-LTIS7E cited
Loft Leg Ltd
The maker's product page for its taller leg, which raises the floor 300 mm to clear up to 400 mm of insulation; it settles the taller option.
- supplier figure RN-HLEMFB cited
Loft Leg Ltd
The manufacturer's product page for the Loft Leg raised-floor support; it states the 175 mm raise and that on a 100 mm joist it clears 270 mm of quilt insulation. Used only for the product dimension.
Cited in Loft Flooring: Boards, Costs & Installation, Raised Loft Boarding & Loft Legs: Why They Matter.
- supplier figure RN-JX8BSR cited
ROCKWOOL
ROCKWOOL's product page for its stone wool loft roll. It gives the thermal conductivity of 0.044 W/mK and the Euroclass A1 non-combustible fire rating.
Cited in Best Loft Insulation: Materials Compared.
- supplier figure RN-NL78OO cited
ROCKWOOL Ltd
Rockwool's loft roll datasheet, whose U-value table gives 0.16 W/m²K for 100 mm between joists plus 170 mm over them, 270 mm in total; it settles the build-up and U-value.
Cited in Raised Loft Boarding & Loft Legs: Why They Matter, Rockwool vs Other Mineral Wool: Which to Use.
- supplier figure RN-ZKHN9F cited
Screwfix
Screwfix product page for a one-hour fire-rated, fully insulated drop-down loft access door for a 562 x 726 mm opening, priced at £125.20 including VAT.
Cited in Loft Hatch Guide: Sizes, Fire-Rated Hatches & How to Fit One.
- supplier figure RN-RALHPT cited
Screwfix
A merchant listing for Loft Leg, the most widely sold raised-boarding leg. It states the legs raise the loft floor 175 mm above the joists; the maker's own site renders in the browser and cannot be fetched.
Cited in How Much Does Loft Boarding Cost? (UK 2026), Loft Boarding: How to Board a Loft Properly, Raised Loft Boarding & Loft Legs: Why They Matter.