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 1 of 8.
- very strong RN-5IW4SZ cited
Central Bedfordshire Council, published on Contracts Finder
The council's awarded contract notice for thatched roof replacement works at Southill Lower School, awarded in March 2020 with a total contract value of £26,000.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-VJ3HJU cited
Department for Environment, Food and Rural Affairs
The GOV.UK page for the statutory biodiversity metric. It publishes the tool and guides, including guidance on moving data from the earlier Biodiversity Metric 4.0.
Cited in Green Roofs & Living Roofs.
- very strong RN-UUNLEJ cited
Department for Environment, Food and Rural Affairs
Defra's user guide to the statutory biodiversity metric. It says green roofs on dwellinghouses count towards the on-site score but must be recorded as 'other green roof' regardless of design.
Cited in Green Roofs & Living Roofs.
- very strong RN-HXRMK1 cited
GOV.UK
The government's guidance on mandatory biodiversity net gain. It gives the 10 per cent objective and the dates from which the duty applies to major and non-major development.
Cited in Green Roofs & Living Roofs.
- very strong RN-II89LG cited
Health and Safety Executive
HSE states that almost one in five deaths in construction work involve roof work, with the main causes being falls from roof edges or openings and falls through fragile roofs and fragile rooflights. It requires all roofs to be treated as fragile until a competent person has confirmed otherwise, and calls for a working platform beneath the roof where possible, with stagings, guard rails, fall restraint, fall arrest and safety nets slung beneath and close to the roof. Sloping roofs need edge protection at the eaves, and on terraced properties to both front and rear; flat roofs need a secure double guardrail and toeboard around the edge. This is the citation for why a roof job needs scaffolding rather than a ladder.
Cited in How to Remove Moss From a Roof: Should You Pressure Wash?, Leaking Roof: Causes, Costs & Fixes, Ridge Tiles & Dry Ridge Systems, Roof Felt (Underlay) Replacement: Cost & Signs It's Failing and 3 more.
- very strong RN-1I8FE8 cited
Historic England
Historic England's guidance on traditional thatch sets out the regional traditions: long straw across lowland England, combed wheat reed in the South West, water reed in the Broads and fens.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-FNICX8 cited
Historic England
Historic England's guidance on insulating thatched roofs gives the number of thatched buildings in England as around forty thousand.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-YHLATL cited
Historic England
Historic England's summary of Fire Protection Association research: sparks and embers, not heat transfer, ignite thatch; spark arrestors did little; sweep often, fit bird guards, line the flue.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-HHM3KK cited
Historic England
Historic England's homeowner guidance on thatch repair: check with the planning authority first, use regional materials, and expect to need permission to strip a basecoat.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-S2XV51 cited
Historic England
Historic England's page on thatching material supply describes the growth of imported water reed and the matching decline in UK water reed and straw production.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-4DZRPW cited
Historic England
Historic England's advice page on heritage crime and metal theft from places of worship; it confirms metal theft remains a live problem for churches.
Cited in Lead Flashing & Alternatives Explained.
- very strong RN-BQRUQ5 cited
LABC
LABC's technical article on BS 5534. It explains that since 2014 mortar can no longer be the only fixing, so ridge and hip tiles must be mechanically fixed, and that BS 5534 now refers to BS 8612 for dry-fix systems.
Cited in Ridge Tiles & Dry Ridge Systems, Roof Replacement: Signs You Need One & What's Involved.
- very strong RN-5M61SB cited
LABC Front Door
LABC's homeowner guidance on chimney removal. It says a building regulations application is needed to remove a chimney breast and why the full plans route usually suits.
Cited in Chimney Repair, Removal & Flashing Costs.
- very strong RN-351RZQ cited
LABC Warranty
LABC Warranty technical article on batten space ventilation. For warm roofs with an LR underlay it calls for an AVCL and a ventilated batten space under air-impermeable coverings.
- very strong RN-A2P67Z cited
LABC Warranty
LABC Warranty's technical manual chapter on roofs. It reproduces BS 5534 Table 3 minimum batten sizes, batten length, support and nailing rules, grading and marking, and the HR and LR underlay definitions.
Cited in Breathable Membranes for Roofs & Walls, Fascias, Soffits & Bargeboards Explained, Kingspan & Celotex PIR Boards: Sizes & Cost, Loft Boarding: How to Board a Loft Properly and 6 more.
- very strong RN-4QI05B cited
LABC Warranty
LABC Warranty technical update on the 2014 revision and 2018 amendment of BS 5534. It records that the 2014 revision withdrew reliance on mortar and required mechanical fixing of ridge and hip tiles.
Cited in Leaking Roof: Causes, Costs & Fixes, Natural Slate vs Fibre-Cement Slate, Roofing Battens & Felt: Spec & Cost.
- very strong RN-IU0X2M cited
Ministry of Housing, Communities and Local Government
The 2022 amendments took effect 1 October 2022 and extended the carbon monoxide alarm provisions. Table 2 sets the minimum flue sizes: 200mm diameter for a fireplace with an opening up to 500mm by 550mm, 125mm diameter for a closed appliance up to 20kW burning smokeless or Clean Air Act compliant fuel, 150mm for other closed appliances up to 30kW and 175mm for those above 30kW and up to 50kW. Diagram 17 gives the flue outlet clearances: at or within 600mm of the ridge the outlet must be at least 600mm above the ridge, elsewhere on a roof it must be at least 2300mm horizontally from the nearest weather surface and either 1000mm above the intersection or as high as the ridge, and it must be 1000mm above the top of any openable rooflight or dormer within 2300mm. Bends must be no more than 45 degrees to the vertical and paragraph 1.49 limits a sweepable flue to four changes of direction.
Cited in Boiler Replacement & Central Heating Costs (UK), Chimney Sweep Cost: 2026 UK Price Guide, Fireplaces & Flues Explained, How to Box In Pipes & Boilers and 5 more.
- 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-ISI2YI cited
Ministry of Housing, Communities and Local Government
2024 government hygrothermal modelling assessment of sprayed foam on domestic timber roofs, and an unusually quotable secondary source for BS 5250:2021's prescriptive roof guidance. Risks are low only where an OPEN CELL, moisture permeable insulant is used with an air and vapour control layer on the warm side and a space left between insulation and underlay, ventilated from the eaves where a high resistance underlay is used. For a WARM pitched roof with a high resistance underlay such as bitumen felt: each ventilated void should be at least 25 mm deep, ventilated at high and low level, plus a 15 mm allowance for underlay drape, giving 25 + 15 = 40 mm. For a low resistance underlay, option 1 is an AVCL plus an unventilated counter batten air gap for air permeable coverings; option 2, where an AVCL is impracticable, follows the HR guidance. It also states plainly that official moisture guidance is Approved Document C, that AD C was last fully revised in 2004 with 2010 and 2013 amendments, and that AD C REFERENCES THE 2002 EDITION OF BS 5250, not the current 2021 edition. It names BS EN ISO 13788:2012 (the Glaser method) as the calculation method referenced by the 2002 edition, and notes the Glaser method may underestimate risk because it cannot simulate heat and liquid transport, unlike BS EN 15026:2007.
Cited in Internal Wall Insulation: Costs & Methods, Roof Tiles & Slates: Coverage, Fixings & Ventilation, Spray Foam Insulation: Costs, Risks & Mortgage Issues.
- 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-XGHWIW cited
Planning Portal
Explains the two loads a replacement roof has to deal with. For wind uplift the roof must be tied down to the structure with straps roughly 1.2m long fixed to the wall plate at every 2.0m centres. For spreading, it explains that ceiling joists fixed to the bottom of the rafters stop the rafters pushing the walls apart, and that a roof left exposed without ceiling joists needs an engineer's advice. The page states it is not a definitive source of legal information and refers readers to their local building control authority, so pair it with Approved Document A for the 15 per cent loading threshold.
Cited in The Complete UK Roofing Guide (2026).
- very strong RN-ITXSTK cited
Planning Portal
Explains that fitting a rooflight generally means cutting away part of one or more rafters or joists, so new support must be introduced, usually two pieces of timber fixed together spanning the new opening on either side. It directs the U-value limit to Approved Document L1 Volume 1, Table 4.2, and states that the room the rooflight serves must be ventilated, with the rooflight able to provide both rapid (purge) and background ventilation, and that ventilation of the roof void must also be considered.
Cited in Glazed Extensions: The Complete UK Guide, The Complete UK Roofing Guide (2026).
- very strong RN-3X8KRH cited
Planning Portal
The Planning Portal's consumer-facing statement of the Class C roof alteration rules: an alteration must not project more than 150 millimetres from the plane of the existing roof slope, and a window in a roof slope forming a side elevation must be obscure-glazed and, if opening, sited 1.7 metres above the floor of the room. Useful as the plain-English citation to sit alongside the GPDO itself; it refers readers to the government's householder technical guidance for the rest.
Cited in Natural Slate vs Fibre-Cement Slate.
- very strong RN-355YOK cited
Planning Portal
Planning Portal guidance on roofs. It says re-roofing that does not materially affect a house's appearance usually needs no planning permission.
Cited in Slate Roof Tiles: Types, Cost & Lifespan.
- very strong RN-AWXGQV cited
Swindon Borough Council, published on Contracts Finder
The council's awarded contract notice for re-thatching the cottage roof of the Richard Jefferies Museum, awarded in August 2018 to a master thatcher for £28,650.
Cited in Thatched Roof Cost: 2026 UK Price Guide.
- very strong RN-JIL0CL cited
The National Archives (legislation.gov.uk)
Defra's explanatory memorandum to a 2007 statutory instrument. It refers to the controls enacted in 2003 on the marketing and use of copper chrome arsenic wood preservative.
- very strong RN-5QRXP7 cited
The National Archives (legislation.gov.uk)
Class C permits any other alteration to the roof of a dwellinghouse, which is the right rooflight and Velux loft conversions rely on. Paragraph C.1(b) makes development not permitted if the alteration would protrude more than 0.15 metres beyond the plane of the roof slope, measured perpendicular to the original roof plane, and C.1(c) if the highest part of the alteration would be higher than the highest part of the original roof. C.1(d) excludes chimneys, flues, soil and vent pipes and solar equipment from the class, and condition C.2 requires any window in a roof slope forming a side elevation to be obscure-glazed and non-opening below 1.7 metres above the floor of the room.
Cited in Do You Need Planning Permission for a Loft Conversion?, Loft Conversion Windows & Skylights: Complete Guide, Loft Storage Ideas: Maximising Space Safely, Non-Habitable Loft Conversion: Loft Rooms & the Rules and 11 more.
- very strong RN-M0RXVO cited
The National Archives (legislation.gov.uk)
Defines 'work at height' as (a) work in any place, including a place at or below ground level, and (b) obtaining access to or egress from such a place while at work, except by a staircase in a permanent workplace, where, if measures required by these Regulations were not taken, a person could fall a distance liable to cause personal injury. No minimum height is stated anywhere in the definition, which is the authority for killing the common '2 metre rule' claim in trade and garden-maintenance copy. Also defines fragile surface, personal fall protection system, working platform and suitable and sufficient.
Cited in Hedge Trimming Cost: 2026 UK Price Guide.
- strong RN-DFUI2F cited
British Board of Agrement
The document that settles what BS 5534's geographical wind zones are actually called. Table 3 is headed 'Zones of applicability according to BS 5534:2014, Clause A.8' and gives Zones 1 to 2 at a 345 mm batten gauge with battened lap, and Zones 1 to 5 at 250 mm battened lap, taped laps, integrated taped laps or with counter battens. They are NUMBERED 1 to 5, not lettered, so any note quoting a lettered exposure zone for roof fixings is wrong. Table 2 gives declared wind uplift resistances of 1119, 2165, greater than 1932, 2949 and 1932 Pa for those five conditions, and note (2) fixes the minimum design wind pressure for Zone 1 at 820 Pa. Validity is limited to a well sealed ceiling as defined in BS 9250:2007 clause 3.7, ridge height 15 m or less, pitch 12.5 to 70 degrees, site altitude 100 m or less and insignificant topography; otherwise uplift must be calculated from BS 5534. Counter batten allowance applies to any counter batten 11 mm deep or more, and NHBC does not accept wind zones based on counter battens on an unsupported roof. Also confirms BS 8000-6:2023 as the live workmanship code. Note the UKAS suspension of BBA accreditations from 26 Feb 2026 when weighing this source.
Cited in Roof Tiles & Slates: Coverage, Fixings & Ventilation.
- 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-DQAH47 cited
BSI
Published 31 January 2018, this is the standard behind every dry ridge and dry verge claim. It applies to dry-fixed ridge and hip systems connected to timber ridge or hip battens, ridge boards or hip rafters, and to dry-fixed verge systems installed with slating or tiling, for both new buildings and renovations. It sets minimum performance requirements for fixing resistance, weather-tightness and durability with guidance on ventilation, and includes the performance tests, calculation methods and acceptance criteria. Cite it when a note says mortar bedded ridges have been superseded by mechanically fixed dry systems.
Cited in Roof Tiles & Slates: Coverage, Fixings & Ventilation.
- strong RN-8IZ4FB cited
BSI
BSI catalogue page for BS EN 12326-2. It confirms that Part 2 of BS EN 12326 is the methods-of-test standard for roofing slate.
Cited in Natural Slate vs Fibre-Cement Slate.
- strong RN-7D8OFR cited
BSI
The BSI catalogue entry for BS EN 13948, which confirms the standard exists and is the root penetration test for bitumen, plastic and rubber roof waterproofing sheets.
Cited in Green Roofs & Living Roofs.
- strong RN-QWYQ8T cited
BSI (British Standards Institution)
STATUS: CURRENT. BS 4978:2007+A2:2017 was published 30 November 2017 and is the live edition, superseding BS 4978:2007+A1:2011, BS 4978:2007 and the older BS 4978:1988 Specification for softwood grades for structural use. It specifies the methodology for visual strength grading of softwood for structural use and sets the permissible limits of characteristics (knots, slope of grain, fissures, wane, distortion, rate of growth) for two visual grades: GS (General Structural) and SS (Special Structural). These are grades, not strength classes: the strength class a graded piece maps to (C16, C24 and so on) depends on species and is assigned via BS EN 1912 and BS EN 338, so a note saying a timber is graded C24 to BS 4978 is conflating the two. The catalogue page confirms number, title, date, status and grades; the limit tables are paywalled.
Cited in Reclamation Yards & Salvage: Buying Reclaimed Materials, Roof Battens & Counter-Battens: Sizes & Grading, Structural Materials: The Complete Guide, Timber Merchants: What They Stock & How to Buy.
- strong RN-6UNXU6 cited
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-FCTWJD cited
BSI (British Standards Institution)
STATUS: CURRENT. BS 5534:2014+A2:2018 published 28 February 2018. Full title is 'Slating and tiling for pitched roofs and vertical cladding. Code of practice' - NOT the older 2003 title 'Code of practice for slating and tiling', which is a common stale citation. Gives recommendations primarily for the design, performance and installation of new build pitched roofs including vertical cladding, and for normal re-roofing work including repairs, using slates, tiles, shingles and shakes and their associated components. The A2:2018 amendment reworked wind loads and uplift resistances of the roof covering and underlay around the Eurocodes and withdrew reliance on the tensile strength of mortar bedding to resist wind uplift, which is why mortar-bedded ridges and verges alone no longer satisfy the code. Batten grading rules sit inside this standard (clause 4.11 and its annex), not in BS 4978, BS 5756 or BS EN 14081.
Cited in Builders' Merchants Explained: How They Work & How to Buy, Clay vs Concrete Roof Tiles: Cost, Lifespan & Looks, Lead Flashing & Alternatives Explained, Natural Slate vs Fibre-Cement Slate and 7 more.
- strong RN-1YSDSK cited
BSI (British Standards Institution)
STATUS: CURRENT. BS 8417:2024 published 15 August 2024, superseding BS 8417:2011+A1:2014. Gives recommendations and guidance for the preservative treatment of wood to provide protection against biodeterioration in end-use situations. Covers solid wood and glued laminated wood (Glulam); excludes wood-based panel products, physically or biologically modified wood, and curative treatments. It takes into account the natural durability and treatability of the wood, the use class as defined in BS EN 335, and the desired service life, and recommends penetration and retention levels for different timber components. This is the source of the Use Class 2 / Use Class 4 language on treated batten and fence post labelling, and of the stated desired service lives (30 or 60 years) manufacturers quote. Treatment certificates quoting BS 8417:2011 predate the 2024 rewrite.
Cited in Dry Rot vs Wet Rot: Identify & Treat, Fencing Cost & Types: A UK Guide, Padstones, Bearings & Wall Plates Explained, Roof Battens & Counter-Battens: Sizes & Grading and 1 more.
- strong RN-FMD1BX cited
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.
Cited in Structural Materials: The Complete Guide.
- strong RN-2FH5S1 cited
BSI (British Standards Institution)
STATUS: CURRENT. BS EN 13956:2012 was published 31 January 2013, is identical to EN 13956:2012 and supersedes BS EN 13956:2005. It gives the definitions and characteristics for plastic and rubber sheets used for roof waterproofing, specifying the requirements and test methods and providing for evaluation of conformity, with thermoplastic rubber blends and alloys covered and typical materials and applications set out in Annex E. This is the harmonised product standard behind single ply flat roof membranes such as EPDM, TPO and PVC, so it is what a note should cite when it says a single ply membrane is CE or UKCA marked, as distinct from BS EN 13707 for reinforced bitumen membranes and BS 6229 for the design of flat roofs with continuously supported coverings. Catalogue page confirms number, title, date, status and scope; the characteristic tables are paywalled.
Cited in Flat Roof Materials: EPDM vs GRP vs Felt.
- strong RN-TXD8LA cited
BSI (British Standards Institution)
STATUS: CURRENT, and it is the replacement for the withdrawn BS EN 519. BS EN 14081-1:2016+A1:2019 was published 31 August 2019, ISBN 978 0 539 06 228 1, and supersedes BS EN 14081-1:2016. It sets the requirements for strength graded structural timber of rectangular cross section produced by sawing, planing or similar, covering BOTH visually and machine graded timber, and it gives the test methods, the Assessment and Verification of Constancy of Performance and the marking rules, which is what makes a C16 or C24 stamp on a joist meaningful. It excludes fire retardant treated timber, thermally or chemically modified timber and structural finger jointed timber. Parts 2 and 3 add machine grading type testing and factory production control. Cite this with BS 4978 (visual grading rules), BS EN 338 (strength classes) and BS EN 1912 (assignment of grade and species to class). Catalogue page confirms number, title, date, status, supersession and scope.
Cited in Builders' Merchant vs DIY Store: Which Is Cheaper?, Reclamation Yards & Salvage: Buying Reclaimed Materials, Structural Materials: The Complete Guide, Suspended Timber Floors: Joists, Boards & Ventilation and 1 more.