Roofing Materials
303 sources in the library on roofing materials, 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 2 of 8.
- strong RN-JXXFKF cited
BSI (British Standards Institution)
STATUS: CURRENT. BS EN 492:2012+A2:2018 was published 30 June 2018 and supersedes BS EN 492:2012+A1:2016 and BS EN 492:2012. It sets the technical requirements and test methods for fibre cement slates and fittings used for roofing and for internal and external wall and ceiling finishes, applying to slates with a maximum height dimension of 850 mm and covering products reinforced with various fibre types. It specifies nominal dimensions, shapes and edge configurations and gives test methods for density, mechanical properties and water resistance (impermeability). Importantly for a note, it does NOT cover installation technique, design or wind uplift calculation: those sit in BS 5534, so a note should not cite BS EN 492 for fixing patterns. Catalogue page confirms number, title, date, status and scope; the requirement tables are paywalled.
Cited in Natural Slate vs Fibre-Cement Slate.
- strong RN-BI7QQG cited
BSI (British Standards Institution)
STATUS: CURRENT. BS EN ISO 12543-2:2021 was published 28 February 2022 and is identical to ISO 12543-2 and EN ISO 12543-2; it supersedes BS EN ISO 12543-2:2011. It sets the performance requirements for laminated safety glass as defined in ISO 12543-1, covering impact behaviour, durability against humidity, high temperature and solar radiation, fire performance, appearance and dimensional specification. This is the part to cite for laminated safety glass, which matters for rooflights and overhead glazing where laminate is required so that a broken pane is retained by the interlayer rather than falling; toughened glass to BS EN 12150-1 fragments instead. The series has six parts: -1 definitions and component parts, -2 laminated safety glass, -3 laminated glass, -4 test methods for durability, -5 dimensions and edge finishing, -6 appearance. Catalogue page confirms number, title, date, status and scope; the requirements are paywalled.
- strong RN-3B3DX9 cited
BSI (British Standards Institution)
STATUS: CURRENT, and it is the replacement for a standard the notes still cite. BS EN ISO 16535:2019 was published 31 July 2019 and expressly supersedes BS EN 12087:2013, which is WITHDRAWN. It specifies the equipment and procedure for determining the long term water absorption of thermal insulating products, giving two methods: method 1 partial immersion and method 2 total immersion. This is the test behind the WL(T) declared value used to compare rigid boards for below ground, inverted roof and perimeter use, which is why extruded polystyrene (XPS) is specified below damp proof level rather than expanded polystyrene or unfaced PIR. Any note citing BS EN 12087 for water absorption of insulation should be corrected to BS EN ISO 16535. Catalogue page confirms number, title, date, status, the supersession of BS EN 12087:2013 and the two methods; the procedure detail is paywalled.
Cited in EPS vs XPS Insulation: Which & Where.
- strong RN-6NMV03 cited
European Organisation for Technical Assessment (EOTA)
EOTA's ETAG archive records that ETAGs were converted into EADs, with ETAG 005 (liquid applied roof waterproofing kits) superseded by EAD 030350-00-0402 and ETAG 006 by EAD 030351-00-0402.
Cited in Flat Roof Materials: EPDM vs GRP vs Felt.
- strong RN-9EE8ED cited
HETAS
HETAS's page on its Approved Chimney Sweep scheme, naming APICS, the Guild, NACS and Sweep Safe as the recognised associations and requiring HETAS training.
Cited in Chimney Sweep Cost: 2026 UK Price Guide.
- strong RN-37TLPF cited
HETAS
HETAS consumer advice on sweeping frequency. States the chimney should be swept at least twice a year when burning wood and at least once a year when burning smokeless fuels, and that the best times are just before the start of the heating season and after the stove has been out of use for a prolonged period; where sweeping twice, the second sweep should follow the peak of the main heating season. Frequency also depends on how heavily the appliance is used. This is the only citable tier 2 statement of UK sweeping intervals; the commonly quoted Guild of Master Chimney Sweeps table is not from a body on the permitted source tiers.
Cited in Chimney Sweep Cost: 2026 UK Price Guide.
- strong RN-GSDAA1 cited
NHBC
August 2022, first issue, one page. NHBC performance standard 7.2.15 requires roofs to have adequate precautions against condensation. Section 12.4.3.2 of BS 5250 gives the method for deciding whether a roof covering is air permeable: the covering is deemed air permeable if the airflow at a differential of 10 Pa exceeds 17.4 m3/h Ar, where Ar is the tested area of the outer weatherproof covering in m2 as defined in BS 5534:2014+A2:2018; below that it is air impermeable. Where air impermeable coverings are used on a COLD pitched roof with an LR underlay, provide ventilation openings to the roof void per BS 5250 sections 12.5, 12.6 and 12.7, plus ventilation openings to the batten space above the underlay created with minimum 25 mm deep counter battens, free area not less than 25,000 mm2/m at eaves level and 5,000 mm2/m at ridge level. The same batten-space figures apply on a WARM pitched roof with an LR underlay, with an air and vapour control layer at ceiling level. This is the cleanest in-tier statement of the 25,000 and 5,000 mm2/m opening figures, i.e. 25 mm continuous at eaves and 5 mm at ridge. The live URL 403s to plain scripted fetches on some paths but answers 200 with a browser user agent; the Wayback copy reads cleanly.
Cited in Roof Tiles & Slates: Coverage, Fixings & Ventilation.
- 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, Damp Proof Membranes (DPM) & DPC: Types & Installation, EPC Ratings Explained & How to Improve Yours, External Wall Insulation (EWI) Systems & Finishes and 4 more.
- good RN-J8WBI4 cited
Lead Sheet Training Academy
The LSTA is the UK training body for lead and hard metal roofing, operating from a purpose-built facility at East Peckham in Kent and recognised as a CITB Approved Training Organisation. It publishes Rolled Lead Sheet: The Complete Manual, the standard reference for lead sheet codes, fixing centres and detailing at chimneys, valleys and abutments. It is the correct authority for a lead flashing note, and its training status is the credential to look for in a leadworker.
Cited in The Complete UK Roofing Guide (2026).
- good RN-FD70KE cited
Lead Sheet Training Academy
The Lead Sheet Training Academy's page for the Rolled Lead Sheet manual. It describes the manual as the industry's technical standard for rolled lead sheet to BS EN 12588, endorsing BS 6915.
Cited in Lead Flashing & Alternatives Explained.
- good RN-616CAH cited
National Federation of Roofing Contractors
NFRC guidance sheet MRK111 v2.0, March 2021, and the best free tier-3 source on battens. Rafters at a maximum spacing of 600 mm centres. Battens conforming to BS 5534 arrive pre-graded, so on-site grading is no longer needed; every batten is stamped with supplier details, size, origin (imported or British grown and/or species code), 'Graded BS 5534' and independent third-party accreditation. Permitted species: British-grown larch (WLAD), British pine (WPNN), British spruce (WPCS); imported redwood (PNSY), whitewood (WPCA), spruce-pine-fir (WPCE), southern pine (WPNE). COUNTER BATTENS DO NOT NEED TO BE GRADED provided they are fully supported and fit for purpose. No section of batten should be under 1.2 m or fixed at fewer than three points to the rafters. Nails 3.35 mm diameter, typically 65 mm long, but a fixing calculation is required as wind loading may change nail type and size. Joints square sawn and butted onto the centre of a rafter. Truss rafter roofs: gauge over 200 mm, no more than one joint on the same support in any four consecutive courses; gauge under 200 mm, no more than three joints in any twelve. Cut ends at verges treated with preservative where they meet bedded mortar. The HSE only approves BS 5534 graded battens as a secure foothold.
- good RN-0NJ8CN cited
National Federation of Roofing Contractors
The roofing trade body's own index of the standards that govern UK roofing work, useful for checking which standard a note should name. It lists BS 5250:2021 management of moisture in buildings, BS 5534:2014+A2:2018 slating and tiling for pitched roofs and vertical cladding, BS 6229:2018 flat roofs with continuously supported flexible waterproof coverings, BS 8612:2018 dry fixed ridge, hip and verge systems, BS 8000-6:2013 slating and tiling workmanship, BS 8217:2005 reinforced bitumen membranes, BS 8218:1998 mastic asphalt roofing, BS 5427:2016+A1:2017 profiled sheet cladding and BS 8414-1 and 2:2020 fire performance of external cladding, alongside Approved Documents A, B, H and L.
Cited in The Complete UK Roofing Guide (2026).
- good RN-2GTUTB cited
Roof Tile Association
The Roof Tile Association on the durability standards for clay and concrete roof tiles: the three frost resistance levels for clay tiles under BS EN 1304 and the BS EN 539-2 test (Level 1, a minimum of 150 freeze-thaw cycles, required for UK use), and the role of BS 5534.
Cited in Clay vs Concrete Roof Tiles: Cost, Lifespan & Looks.
- good RN-TYCW4D cited
Timber Development UK
The timber trade body's article on BS 5534 roofing battens. It says only battens graded to BS 5534 may be used as roofing battens and that the grading requirements are in Annex D of the standard.
- good RN-PNDQHV cited
Timber Development UK
Timber Development UK's guide to Use Class 2 treated wood. It defines UC2 as wood used indoors, above ground and within the building envelope with an occasional risk of wetting, and lists tiling battens as a UC2 use.
- fair RN-00VIDG cited
Energy Saving Trust
Solar thermal performance and cost. Hot water accounts for around 11% of the average energy bill. A typical installed system costs around £5,300. Output is seasonal: roughly 90% of hot water demand in summer falling to around 25% in winter, averaging about half of annual hot water needs, so the system is always paired with a conventional boiler or immersion heater. Installation by an MCS certified contractor brings both workmanship and product warranties, typically several years on workmanship and longer on the collectors themselves. Maintenance requires a thorough check every five years to flush the system and replace the fluid mix. Last updated 20 May 2026.
Cited in Hot Water Options for Your Home.
- fair RN-26W44O cited
Green Roof Organisation
The UK green roof industry code of practice. Its Table 1 gives average annual rainfall run-off by roof type: 81% for a standard roof, 50% and 45% for green roofs with 50 mm and 100 mm of substrate.
Cited in Green Roofs & Living Roofs.
- fair RN-Q66G5M cited
HomeOwners Alliance
The spray foam roof insulation problem set out with numbers. The Property Care Association estimates as many as 250,000 UK homes have spray foam in the loft, after roughly 30 years on the market and a decade of grant driven growth. Lenders may decline or downvalue a property with it. A specialist surveyor's inspection of the roof, structure and paperwork costs £500 to £700. Removal runs about £40 per m2 per Checkatrade, before skips and disposal; a reader case is quoted where removal of open cell foam was priced at £17,000 against an original £12,000 installation. Warns about rogue removal firms and states the code expectation of a cooling off period of at least 14 days during which no install or removal should take place.
Cited in Spray Foam Insulation: Costs, Risks & Mortgage Issues.
- fair RN-NEXTM9 cited
Institute of Historic Building Conservation
IHBC homeowner guidance on slate and stone roofs. It supports the very long service life of a maintained natural slate roof.
Cited in Slate Roof Tiles: Types, Cost & Lifespan.
- fair RN-EPV6GE cited
Lead Sheet Advisory Service
The Lead Sheet Advisory Service's guide to lead codes. It describes Code 4 (1.80 mm, 20.41 kg/m²) as the code used for exposed flashings, pitched valley gutters and vertical cladding.
Cited in Chimney Repair, Removal & Flashing Costs, Insulating & Repairing a Bay Window Roof, Lead Flashing & Alternatives Explained, Roof Replacement: Signs You Need One & What's Involved and 1 more.
- fair RN-Q076GK cited
Liquid Roofing and Waterproofing Association
A trade association guidance note on flat roof falls. It cites BS 6229's 1:80 minimum finished fall and explains that 1:40 or 1:60 design falls are used to allow for deflection and site inaccuracies.
Cited in Flat Roof Materials: EPDM vs GRP vs Felt, Green Roofs & Living Roofs.
- fair RN-TM46UG cited
National Association of Chimney Sweeps (NACS)
The NACS home page, whose sweeping-frequency guide recommends sweeping oil and gas flues once a year. NACS is the largest UK chimney sweep trade association.
Cited in Chimney Sweep Cost: 2026 UK Price Guide.
- fair RN-7MM0FG cited
NBS
NBS technical article on specifying roofing slate to BS EN 12326. It explains that high carbonate content reduces durability and that slates are tested for sulphur dioxide exposure, the acid-rain test.
Cited in Slate Roof Tiles: Types, Cost & Lifespan.
- fair RN-YOG9ON cited
Timber Development UK
Timber Development UK's trade guidance on roofing battens, issued after NFRC warnings about counterfeit battens. It says battens should be pressure treated to Use Class 2 for 60 years and non-compliant battens rejected from site.
Cited in Roofing Battens & Felt: Spec & Cost.
- fair RN-ZAOO4R cited
Trussed Rafter Association
A Trussed Rafter Association technical note on timber grades. It says TR26 is the predominant trussed rafter grade in the UK and that design software allows C24 or other strength classes to be used.
Cited in Structural Timber Grades: C16 vs C24 Explained, Truss Roof Cost: 2026 UK Price Guide.
- fair RN-EVFGT9 cited
Trussed Rafter Association
The Trussed Rafter Association's FAQ. It says there is no set price for trussed rafters, that prices vary between manufacturers and with truss size, and recommends getting a custom quote.
Cited in L-Shaped Dormer Loft Conversions: Cost & Layout, Truss Roof Cost: 2026 UK Price Guide.
- fair RN-19KM26 cited
Trussed Rafter Association
The Trussed Rafter Association's installation guidance. Its erection sequence requires all specified longitudinal, diagonal and chevron bracing to be fixed, with galvanised retaining straps to walls and gable ends.
Cited in Loft Flooring: Boards, Costs & Installation, Loft Hatch Guide: Sizes, Fire-Rated Hatches & How to Fit One, Strengthening Loft Floors for Conversion, Truss Roof Cost: 2026 UK Price Guide.
- fair RN-VKJJ37 cited
Trussed Rafter Association
The Trussed Rafter Association page on room in roof trusses. It settles that attic trusses provide the structural roof and the room's floor in one factory-made component.
Cited in Truss Roof Cost: 2026 UK Price Guide.
- fair RN-KN1LD6 cited
Trussed Rafter Association
A Trussed Rafter Association article on design information for trusses. It settles that manufacturers design trussed rafters with software to Eurocode 5 and fabricate them to BS EN 14250.
Cited in Truss Roof Cost: 2026 UK Price Guide.
- fair RN-Z85RPE cited
Trussed Rafter Association
The trade association page describing trussed rafter roofs. It settles that trusses are individually designed, factory-made timber components joined with steel nail plates that form the roof structure.
Cited in Truss Roof Cost: 2026 UK Price Guide.
- supplier figure RN-L6S0SQ cited
A. Proctor Group
A membrane manufacturer's technical article setting out the BS 5250 underlay types; it says traditional bitumen roofing felt is a type HR underlay that vapour cannot pass through.
Cited in Roof Felt (Underlay) Replacement: Cost & Signs It's Failing.
- supplier figure RN-969MU5 cited
Associated Lead Mills
A UK lead mill's weight chart for rolled lead sheet to BS EN 12588. It gives the thickness and mass per square metre for Codes 3 to 8, matching every figure in the note's code table.
Cited in Lead Flashing & Alternatives Explained.
- supplier figure RN-SJ4L28 cited
Associated Lead Mills (technical content extracted from the Lead Sheet Association's Complete Manual)
A lead mill's guide whose technical content is extracted from the LSA manual. Its code chart lists Code 4 for soakers, flashings and cladding, and Code 5 for flashings, flat and pitched roofs and parapet, box and tapered gutters (use D).
Cited in Lead Flashing & Alternatives Explained.
- supplier figure RN-V33V0R cited
British Board of Agrément (copy hosted by Alumasc Roofing)
The British Board of Agrément certificate for Firestone RubberGard EPDM flat roof systems; its durability section gives the independently assessed service life of more than 30 years.
Cited in Flat Roof Materials: EPDM vs GRP vs Felt.
- supplier figure RN-9Q10YS cited
Cedral (Etex)
Manufacturer overview of Cedral fibre-cement roofing slates. It gives their reaction to fire class as A2-s1,d0 and a minimum life expectancy of 50 years.
Cited in Natural Slate vs Fibre-Cement Slate.
- supplier figure RN-NR2D7Q cited
Cedral (Etex)
Cedral's UK roofing brochure with technical data for its fibre cement slates, including minimum pitches by exposure and headlap: 20° to 25° depending on lap and exposure.
Cited in Slate Roof Tiles: Types, Cost & Lifespan.
- supplier figure RN-MNSSB6 cited
Cedral (Etex)
Manufacturer technical data for the Cedral Rivendale 600 x 300 mm fibre-cement slate. It gives the laid weight by lap and the minimum pitch by exposure and lap.
Cited in Natural Slate vs Fibre-Cement Slate.
- supplier figure RN-G4UHUM cited
Cedral (Etex)
Cedral's technical data for its 4 mm Thrutone fibre cement slate, giving the weight of slating as about 20.4 kg/m² at a 100 mm lap rising to 22.8 kg/m² at a 150 mm lap.
Cited in Slate Roof Tiles: Types, Cost & Lifespan.
- supplier figure RN-73BAED cited
Cupa Pizarras
Spanish slate producer's technical FAQ on slate coverage and weight. It gives the common 500 x 250 x 5 mm slate as about 35 kg per square metre laid.
Cited in Natural Slate vs Fibre-Cement Slate, Slate Roof Tiles: Types, Cost & Lifespan.
- supplier figure RN-O0XVRY cited
Cupa Pizarras
Cupa Pizarras, a large Spanish slate producer, states in its UK slate guide that it offers warranties of up to 100 years on its natural slate products.
Cited in Natural Slate vs Fibre-Cement Slate.