Roofing Materials
208 sources in the library on roofing materials. 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 6.
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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STATUS: WITHDRAWN on 24 November 2009. BS 5268-2:2002 was published 14 March 2002 and amended in December 2007 to align with CEN material standards, then withdrawn.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 It was superseded by Eurocode 5, BS EN 1995-1-1, which uses limit state design and characteristic values rather than permissible stresses, so any note quoting BS 5268 joist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.
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BSI (British Standards Institution)
STATUS: CURRENT. BS 5440-1:2023 was published 12 December 2023 and supersedes BS 5440-1:2008 and BS 5440-1:2000; a note citing an undated BS 5440 or the 2000 edition should be updated. It specifies requirements for installing gas appliances to chimneys, the chimney work a gas engineer undertakes under UK conditions, and the maintenance of chimneys. It applies to open flued chimneys for Type B appliances and room sealed chimneys for Type C appliances of rated input not exceeding 70 kW net burning 1st, 2nd or 3rd family gases, natural or fanned draught, whether the chimney is supplied with the appliance or separately, and it complements BS EN 15287-1 and BS EN 15287-2 with UK specific requirements. It excludes gas fired incinerators, leisure accommodation vehicles and hydrogen only appliances. Part 2 (BS 5440-2:2023) covers ventilation provision. Catalogue page confirms number, title, date, status and scope; requirements are paywalled.
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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STATUS: WITHDRAWN on 31 January 2014.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.
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BSI (British Standards Institution)
STATUS: CURRENT. BS EN 12588:2006 was published 31 January 2007, is identical to EN 12588:2006, and supersedes BS EN 12588:1999, which is withdrawn. It specifies the designation, chemical composition requirements, surface condition and dimensional tolerances for rolled lead sheet produced by roll deformation, for roofing, flashings, weatherings, cladding, pre formed panels, damp proof courses and similar building uses, and it includes the colour codes for thickness that give the familiar Code 3 to Code 8 lead sheet designations. Two changes from the 1999 edition are worth citing: the maximum tin content was raised from 0.005 per cent to 0.05 per cent to improve corrosion resistance, and manual handling guidance was added because of the weight of the product, along with recycling recommendations noting a documented recycling rate above 90 per cent. Catalogue page confirms number, title, date, status, supersession, scope and those changes.
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BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 1304:2013 was published 30 June 2013 and is the harmonised product standard for clay roofing tiles and fittings used in pitched roof coverings and in vertical wall cladding and lining, superseding BS EN 1304:2005. It specifies structural characteristics, geometric properties, physical and mechanical characteristics, and gives the marking and evaluation of conformity requirements, so it is the standard a clay tile is CE or UKCA marked against. It sits alongside BS EN 490 for concrete tiles, BS EN 492 for fibre cement slates and BS EN 12326 for natural slate, with the test methods for clay tiles in the BS EN 539 series and installation in BS 5534. Catalogue page confirms number, title, date, status and scope; the requirement tables are paywalled.
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BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 14179-1:2016 was published 31 August 2016 and supersedes BS EN 14179-1:2005, which is withdrawn. It specifies the heat soak process system plus the tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat soaked thermally toughened soda lime silicate safety glass for buildings. Its purpose is the point a note should make: ordinary toughened glass to BS EN 12150-1 carries a residual risk of spontaneous breakage from nickel sulphide inclusions, and the heat soak process to BS EN 14179-1 is what reduces that risk, which is why heat soaked glass is specified for overhead glazing, balustrades and large frameless panes. Curved heat soaked glass is excluded. Catalogue page confirms number, title, date, status, supersession and scope; the process detail is paywalled.
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BSI (British Standards Institution)
STATUS: WITHDRAWN on 30 April 2010, superseded by BS EN 14250:2010. BS EN 14250:2004 was published 6 January 2005 and specified the product requirements for prefabricated structural members such as trusses, beams and girders made of timber and assembled with punched metal plate fasteners, covering materials, strength, reaction to fire, timber sizing, moisture content, dimensional accuracy and joint requirements, plus evaluation of conformity and marking. This is the standard behind the trussed rafter roof that a loft conversion note has to explain cannot simply have its webs cut out, so it matters that the edition cited is current: a note quoting BS EN 14250:2004 is citing a withdrawn one. Design of the trusses themselves sits under BS EN 1995-1-1. Catalogue page confirms number, title, publication date, withdrawal date and scope.
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BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 14449:2005 was published 10 February 2006, is identical to EN 14449:2005, ISBN 0 580 46084 3, ICS 81.040.20, committee B/520. It specifies the evaluation of conformity and the factory production control for laminated glass and laminated safety glass used in buildings, including requirements that may be subject to regulation, and it notes that glass products incorporating electrical components may also fall under other directives such as the Low Voltage Directive. It is the conformity companion to the BS EN ISO 12543 series, which sets the product requirements: a note should cite BS EN ISO 12543-2 for what laminated safety glass must achieve and BS EN 14449 for how a manufacturer demonstrates and marks conformity. Catalogue page confirms number, title, date, status, ISBN, committee and scope.
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BSI (British Standards Institution)
STATUS: WITHDRAWN on 31 January 2012. BS EN 490:2004+A1:2006 was published 19 January 2005, identical to EN 490:2004, and specified the requirements for concrete roofing tiles and fittings for pitched roof coverings and for wall cladding and lining. It was replaced by BS EN 490:2011, so a note citing the 2004 or 2006 edition is quoting a withdrawn one; an undated citation of BS EN 490 remains safe. The companion test method standard is BS EN 491, and the equivalents for other coverings are BS EN 1304 for clay tiles, BS EN 492 for fibre cement slates and BS EN 12326 for natural slate, with fixing and wind uplift design in BS 5534. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
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BSI (British Standards Institution)
STATUS: WITHDRAWN on 31 January 2012, on the same day as its companion product standard BS EN 490:2004+A1:2006. BS EN 491:2004 was published 18 January 2005, ISBN 0 580 45377 4, and specified the test methods for concrete roofing tiles and valley tiles for pitched roofs: dimensional checks on hanging length, squareness, cover width and flatness, and performance tests for mass, transverse (breaking) strength, impermeability, freeze thaw resistance and nib support. It was replaced by BS EN 491:2011. A note quoting transverse strength figures for concrete tiles tested to BS EN 491:2004 is citing a withdrawn edition. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
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BSI (British Standards Institution)
STATUS: WITHDRAWN on 1 June 2007. BS EN 519:1995 was published 15 October 1995 and set the requirements for machine strength graded structural timber and for the grading machines themselves, covering quality control, test methodology and acceptance criteria. It was superseded by the BS EN 14081 series, Timber structures. Strength graded structural timber with rectangular cross section, whose parts are BS EN 14081-1:2016+A1:2019 general requirements, BS EN 14081-2 machine grading type testing, BS EN 14081-3 machine grading factory production control and BS EN 14081-4. Any note that says timber is machine graded to BS EN 519 is quoting a standard withdrawn in 2007; the machine graded counterpart to visual grading under BS 4978 is now BS EN 14081. Catalogue page confirms number, title, publication date, withdrawal date and scope but does not name the replacement.
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BSI (British Standards Institution)
STATUS: CURRENT. BS EN 539-2:2013 was published 31 May 2013 and supersedes BS EN 539-2:2006. It specifies the test method for determining the frost resistance of clay roofing tiles and fittings, and it is explicit that the method is common across CEN member states while each state sets its own required performance level, which is why UK frost resistance expectations for clay tiles are set nationally rather than by the test standard. Part 1 of the series covers the impermeability test. It is the test standard that supports the product requirements in BS EN 1304:2013, and it is the reference behind a note explaining why an unsuitable clay tile spalls and delaminates after a hard winter. Catalogue page confirms number, title, date, status and scope; the procedure is paywalled.
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BSI (British Standards Institution)
STATUS: WITHDRAWN on 21 September 2022. BS EN ISO 1461:2009 was published 31 July 2009 and superseded BS EN ISO 1461:1999. It specified the properties and test methods for zinc coatings applied by dipping fabricated iron and steel articles in molten zinc, covering the zinc bath, information the purchaser must supply, safety, inspection and sampling, and coating thickness, appearance, adhesion and corrosion resistance. It did not apply to continuously galvanized sheet or wire, mesh, automatic tube and pipe galvanizing, or products with their own standards such as fasteners (BS EN ISO 10684). It has been replaced by the 2022 edition of BS EN ISO 1461, so a note specifying galvanizing to BS EN ISO 1461:2009 is quoting a withdrawn edition and should be undated or cite the current one. Catalogue page confirms number, title, publication date, withdrawal date, what it supersedes and its scope, but does not name the replacement.
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HETAS Limited
HETAS describes itself as a not for profit organisation operating a competent person scheme for installers of biomass and solid fuel heating, together with registration for retailers and chimney sweeps and approval of appliances and fuels. Its site carries searchable registers of registered businesses by postcode or business ID covering retailers, installers, chimney sweeps, servicing engineers and biomass maintenance, plus a separate Removed Business Register for firms no longer registered, and an approved stoves and fuels search. It publishes consumer guidance on choosing a stove, maintenance, and when to have appliances serviced and chimneys swept, and runs Chimney Fire Safety Week, held 7 to 13 September in 2026. HETAS is one of the MHCLG-authorised competent person schemes, so a HETAS registration can be checked rather than taken on trust.
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Glass and Glazing Federation
The GGF is the UK industry body for glass and glazing, representing companies across glazing, fenestration and related trades. It runs a Technical Library and Technical Hub with guidance on windows, doors, conservatories and specialist glazing, a searchable directory of member companies, and a Member Complaint Service for disputes with a member firm. It sits alongside and links to FENSA for windows and doors Building Regulations compliance, BFRC for window energy ratings, and RISA certification. Approved Document L names the GGF as the source of the methods for calculating Window Energy Rating and Doorset Energy Rating, which is why this body matters for a note quoting WER bands.
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Green Roof Organisation
GRO was established in 2008 to provide UK-relevant guidance for green roofs, and represents companies and individuals working on green, blue and biosolar roofs. Work on the GRO Green Roof Code of Best Practice for the UK began in 2009 with the first edition published in 2011, significantly based on the German FLL guidelines adapted to the UK market, expanded in a 2014 edition with clarifications and installation detail, and most recently issued as the 2021 anniversary edition available from the organisation's downloads section. The Code is the reference document manufacturers, contractors, specifiers and standards bodies use for green roof design, installation and maintenance, and it is what a living roof note should cite rather than a supplier's page.
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Insulation Manufacturers Association
The UK trade association for insulation manufacturers, representing PIR and PUR and phenolic foams, XPS and EPS polystyrene, glass wool and stone wool mineral wools and natural materials including sheep's wool, which is exactly the material set a best loft insulation comparison needs to cover. It publishes accredited CPD courses, installation and best practice guides and resources on thermal performance, fire safety and water resistance, with separate regulatory guidance for England, Wales, Scotland and Northern Ireland, and it maintains reference pages on thermal conductivity, R-values and U-values.
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Liquid Roofing and Waterproofing Association
The UK trade association for liquid applied waterproofing, founded in 1979, bringing together manufacturers, contractors and installers of liquid applied membranes. It publishes technical guidance and standards for the sector, including a Hot Melt Code of Practice updated to reflect BS 6229:2025, fire safety resources and a Liquid Roofing Finder product register. It is the body to cite for liquid systems (including GRP and polyurethane) in a flat roof comparison, alongside SPRA for single ply.
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Bat Conservation Trust
How to keep a roost usable after roof works. Access gaps for the small building dwelling species are very small, since those bats land on the building and crawl in, and are usually invisible on the finished building; horseshoe bats are the exception and need a larger letterbox style opening sized to the species, because they fly straight in. Access should normally be recreated as close as possible to its original position so the bats return. Practical detail for tiled and slated roofs: raise a tile slightly on a timber batten or a small piece of tile, and where needed cut a hole in the roofing felt directly beneath the access point, or make a Morris bat slate from spare lead flashing, which is cheap and can be done in house. Access can normally be formed without letting in weather or spoiling the appearance.
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Bat Conservation Trust
How to establish whether a building holds a roost before work starts. A roost is any place a bat uses for shelter or protection, regardless of species, numbers or how long it is used, and is protected all year round whether or not bats are present, because bats are loyal to roosts and return at the same time each year. Bats build no nest and cause no damage, using existing cracks and crevices, and move between roosts through the year as their needs change. Look for droppings, and watch for emergence at around sunset, or up to an hour after, during May to September, or run a dawn re entry survey where the access point is unknown. Local bat groups and local records centres may hold records, but the absence of a record does not mean there is no roost. Warns against disturbance during hibernation, when waking bats burns reserves they may not replace before spring, and during the summer maternity season, when disturbed mothers may abandon a pup, of which there is typically only one a year.
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Bat Conservation Trust
The membrane rule for a roof used by bats, developed with Natural England, Natural Resources Wales and NatureScot. Only bituminous roofing felt containing no polypropylene or polyethylene filaments should be installed, for example bitumen felt type 1F, which is hessian reinforced; it is dark coloured with a rough surface bats can grip. Sarking boards are an acceptable alternative. Non bitumen coated roofing membranes, previously called breathable or modern roofing membranes, BRMs or MRMs, must not be used, because their spun bond polypropylene or polyethylene filaments can be pulled out by roosting bats and entangle them. States plainly that non bitumen coated membranes are not obligatory under any Building Regulations, and that ventilation is still required whichever felt is used, citing BS 5250:2011.
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Bat Conservation Trust
Timing constraints on work to a building with a bat roost. Work is commonly advised to be scheduled either in April, or between mid September and the end of October, when bats are least likely to be present, though the exact window depends on the roost and species. If the timings recommended by the statutory nature conservation organisation cannot be met, the roost owner may need to engage an ecological consultant and obtain a licence. Bats should be factored in from the earliest stage of planning. The free National Bat Helpline is 0345 1300 228. The section also flags the four recurring requirements: creating bat access, roofing membrane choice, cladding, soffits and fascias, and solar panels.
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Cardiff University, Welsh School of Architecture
Five years of five-minute-interval monitoring of the SOLCER House, built 2015, the first affordable energy positive house in the UK. Measured results: total annual electricity imported from the grid 1,112 kWh against 1,458 kWh exported, an overall energy-positive performance of 346 kWh; the house exports 1.3 times more electricity than it consumes and imports about 25 per cent of its energy from the grid, mainly for heating in colder months; net carbon emissions around minus 179 kg per year; savings of up to £1,000 a year on energy bills. Build data a self-builder can use: 100 sq m, three bedrooms, built for £1,200 per sq m using locally sourced materials where possible. Design moves: photovoltaic panels form the south-facing roof and replace roof tiles, and a solar air heating system forms the first-floor external wall finish instead of render, so the generating technology substitutes for cladding rather than adding to it. Published in Energies, 2021. The work led the Welsh Government to invest £91 million in grants, producing over 1,400 affordable low carbon homes.
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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.
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HomeOwners Alliance
Roof condition, life and repair costs. A well maintained stone slate roof can last 100 years or more; RICS warns the common belief that felt flat roof coverings last only 10 to 15 years is a misconception, that felt roofs of that age can go on performing if maintained and protected with gravel or solar reflective paint, and recommends inspecting a flat roof twice a year in spring and autumn plus after storms. Checkatrade repair costs for a 1 m2 area: flat roof £100, pitched clay tile £180, pitched concrete tile £140, pitched slate £170, rising to £1,465, £1,245 and £1,395 respectively where the felt is replaced too. Flat roof repair about £100 per m2. Replacement tiles from about £200, flashing repair from about £250 a metre. Extra joists for an overloaded roof structure £1,000 to £2,000, and a waterlogged and sagging roof structure £5,000 to £12,000. Scaffolding adds about £625 a week, a rooflight £800 to £1,000. Building control approval is not required where less than 25% of a roof is renewed, and is required above that.
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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.
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Society for the Protection of Ancient Buildings
Traditional lead plumbing jointing and pipe fabrication. Gives the solder table by tin to lead ratio and melting point: blowpipe solder 1:2 melting at 171.1 degrees C for delicate work, and tinman's solder 1:1 at 187.7 degrees C for copper bit jointing and tinning. Pipe working figures include bending pipe up to 50mm diameter with a metal bending spring, forming collars on soil and vent pipes up to 75mm, and techniques applied to lead pipe of 75mm to 150mm, with sand used as a former inside the pipe on larger sizes up to 150mm. Also covers cleaning a soiled area before soldering, using a wire drawn back and forth, and blowlamp work.
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Society for the Protection of Ancient Buildings
Regional slating practice with the numbers a specifier needs. Head lap is specified either as a dimension, typically 75 or 100mm (3 or 4 inches), or as a proportion of slate length as in scantle slating, which economically reduces the lap as slates shorten toward the ridge; vertical slate cladding uses a smaller head lap of about 51mm (2 inches). Random slating is triple lapped so each slate is covered by the next course but one and the next course but two, adding an extra layer over double lapping and giving better resistance to driving rain and wind with narrower slates and side laps. Scantle slates run about 12 down to 8 or 6 inches (305 to 203 or 152mm); slates up to 457mm (18 inches) are used for cladding but above about 405mm (16 inches) weight on the fixing becomes a problem, and a 600mm (24 inch) slate would need a wasteful 200mm (8 inch) lap. Warns that specifying BS EN 12326-1 alone is unsafe because the standard has multiple conformity levels: a specification must state the level for water absorption (less than or more than 0.6%, with below 0.3% the most durable), thermal cycling (T1, T2 or T3) and sulphur dioxide exposure (S1, S2 or S3), with quarries providing certificates of conformity. Rust staining indicates oxidising metallic minerals and general whitening usually a high carbonate content.
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University of Sheffield
Modelled hydrological and microclimate results for retrofitting SuDS into an existing urban catchment on the River Don in Sheffield. Runoff for each scenario was modelled in MUSIC against four storms: a 30 year 60 minute design storm, a 100 year 60 minute design storm, the 04/10/2008 Sheffield storm at a 1.38 year return period, and the 13/06/2007 storm at a 15.97 year return period that preceded the June 2007 Sheffield floods. Findings: SuDS reduced both total runoff volume and peak flow rate from the site across the storms; the flood channel scenario gave greater flow reduction than the street-based scenario for almost all storms, cutting both total volume and attenuating the peak. Microclimate modelling in ENVI-met over a 12 hour summer day showed SuDS scenarios reduced local average air temperatures by up to 1C compared with the as-is case, including late in the day when the urban heat island is strongest, with evening relative humidity below 70 per cent at all sites. The practical caveat: the best-performing scenario needed a greater land area and could not be implemented incrementally, which is why SuDS have to be designed in early rather than added late.
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A. Proctor Group
Variable resistance vapour control layer to BS EN 13984:2013. Roll sizes 1.5 m x 50 m and 3 m x 50 m; weight 110 gsm. Vapour resistance EN 12572 Sd 0.8 m to 60 m, varying with humidity so it is more vapour resistant in winter and more permeable in summer. Air permeability BS EN 12114:2000 0.00 m3/m2.hr at 50 Pa. Nail tear resistance EN 12310-1 MD 250 N, CD 270 N; tensile strength EN 12311-1 MD 350 N/50 mm, CD 280 N/50 mm; elongation MD and CD 20%. Reaction to Fire EN 13501-1 Class E. Passivhaus certified component. Revised February 2026, version 1.005.
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A. Proctor Group
Air and vapour permeable water resistant pitched roof underlay to BS EN 13859-1:2010, with a meltblown core. Standard rolls 1 m x 50 m and 1.5 m x 50 m; mass per unit area 170 g/m2. Water vapour resistance Sd 0.015 m and vapour resistance 0.075 MNs/g to EN ISO 12572. Air permeability EN 12114 average 35 m3/m2.h at 50 Pa. Water penetration EN 1928 Class W1; hydrostatic head ISO 811 greater than 1 m, as recommended by NFRC Technical Bulletin 6. Tensile EN 12311-1 before ageing MD 330 N/50 mm, CD 270 N/50 mm; after ageing MD 280, CD 225. Elongation before ageing MD 56%, CD 68%. Reaction to Fire Class E to EN 13501-1 (EN 11925-2). Wind uplift complies with BS 5534; BBA Certificate 24/7147 for non ventilated warm and cold roofs, including roofs with solar PV, with no vapour control layer required. Can be left exposed up to three months of UV exposure.
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A. Proctor Group
Low emissivity vapour control layer to BS EN 13984:2013. Roll sizes 1.5 x 50 m, 2.7 x 100 m and 3 x 100 m; base membrane mass per unit area minimum 121 g/m2. Emissivity EN 15976 less than 0.05, giving a claimed R value of 0.72 m2K/W when used with a minimum 19 mm service cavity. Sd value EN 1931 minimum 150 m. Resistance to water penetration EN 13111:2010 W1. Tensile force EN 12311-1 (modified with EN 13859-2:2014 Annex A) minimum MD 150 N/50 mm, CD 140 N/50 mm; elongation minimum MD 50%, CD 40%; tearing resistance minimum MD and CD 180 N. Reaction to Fire EN 13501-1 Class E.
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A. Proctor Group
Self adhered vapour permeable air barrier tested to BS EN 13859-1/2:2010. Roll 1.5 m x 50 m, roll weight 24 kg; tapes 75, 100, 150 and 300 mm. Nominal thickness 0.65 mm, basis weight 292 g/m2. Water vapour permeability EN ISO 12572 (C) Sd 0.039 m; water vapour transmission BS 3177:1959 893 g/m2 per 24 hr. Resistance to penetration of air EN 12114 0.01 m3/m2.h at 50 Pa. Water penetration EN 1928:2000 Method A Class W1 before and after ageing. Peel adhesion EN 1939 5.01 N/10 mm; tensile EN 12311-1 mean MD 417 N, XD 252 N; tear EN 12310-1 mean MD 412 N, XD 286 N; flexibility no cracks at -40 C. Installation temperature -10 to +60 C, service -40 to +100 C, can be left exposed up to 120 days in the UK. Reaction to Fire Class B-s1,d0 to EN 11925-2 / BS EN 13501-1, tested over 12 mm calcium silicate or fibre cement board per BS EN 13238:2010 and free hanging. BBA Certificate No. 15/5274, Passive House Institute certified component.
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Alumasc Water Management Solutions
Alumasc GX pressed aluminium gutters. Joggle joint profiles: 100 x 75mm GXJ1, 125 x 100mm GXJ2, 150 x 100mm GXJ3, 180 x 125mm GXJ4, 200 x 150mm GXJ5. Smooth profiles: 120 x 75mm GXS1, 140 x 100mm GXS2, 190 x 125mm GXS3, 220 x 150mm GXS4, 225 x 150mm GXS5. Moulded: 113 x 75mm GXM1. Finished with a BBA approved polyester powder coating applied in Alumasc's own facility.
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Alumasc Water Management Solutions
Alumasc Heritage cast aluminium gutter range, sized in imperial-derived profiles. Half round: 100mm (4 in) HR1, 113mm (4.5 in) HR2, 125mm (5 in) HR3, 150mm (6 in) HR6, plus beaded half round 113mm BHR5 and 125mm BHR6, and 113 x 75mm (4.5 x 3 in) HR4. Ogee: 100mm (4 in) OG1, 113mm (4.5 in) OG2, 125mm (5 in) OG3. Moulded: 100 x 75mm (4 x 3 in) MG2, 125 x 100mm (5 x 4 in) MG1, 150 x 100mm (6 x 4 in) MG3.
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BMI Group (Redland)
BMI Redland 49 concrete profile tile. Size 382 x 226mm, hanging length approx 360mm, linear cover 200mm. Minimum pitch and headlap: through-coloured 17.5 degrees at 100mm headlap or 25 degrees at 75mm headlap; granular 22.5 degrees at 100mm headlap or 30 degrees at 75mm headlap, so the granular finish costs 5 degrees of pitch. Maximum pitch 90 degrees, maximum headlap 125mm. Minimum gauge 257mm; maximum gauge 282mm below 25 degrees (30 degrees granular), 307mm above. Covering capacity 17.7 tiles/m2 at 282mm gauge, 16.3 at 307mm. Weight 51 kg/m2 at 282mm gauge, 47 kg/m2 at 307mm; 2.86 tonnes per 1000, 1.01 tonnes per pallet of 336 tiles. Battens 3.26 m/m2. Nails 50 x 3.35mm aluminium.
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BMI Group (Redland)
BMI Redland Cambrian Slate, an interlocking slate engineered from reclaimed natural Welsh slate, BBA certificate 87/1907. Size overall 330 x 336mm, hanging length approx 294mm, linear cover 300mm. Minimum pitch 15 degrees at 75mm headlap or 25 degrees at 50mm headlap, based on a maximum rafter length of 10 metres; maximum pitch 90 degrees. Minimum headlap 50mm, maximum 90mm. Minimum gauge 210mm; maximum gauge 225mm below 25 degrees, 250mm at 25 degrees and over. Covering capacity 14.8 slates/m2 at 225mm gauge, 13.3 at 250mm. Weight only 18 kg/m2 at 225mm gauge and 17 kg/m2 at 250mm gauge, roughly a third of a concrete interlocking tile; 1.24 tonnes per 1000 slates, 0.76 tonnes per pallet. Battens 4.0 m/m2. Stainless steel annular ring shank nails 30 x 2.65mm. 600 slates per pallet, 10 per pack.
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BMI Group (Redland)
BMI Redland Regent concrete profile tile, ref RED_TDS_2203. Size 418 x 332mm, hanging length approx 397mm, linear cover 300mm. Minimum pitch and headlap for through-coloured tiles 12.5 degrees at 100mm headlap or 17.5 degrees at 75mm headlap; where the roof slope includes inclined valleys the minimum is 15 degrees, and the datasheet warns that a roof window may impose its own higher minimum pitch. Maximum pitch 90 degrees, maximum headlap 125mm. Minimum gauge 293mm; maximum gauge 318mm below 17.5 degrees and 343mm at 17.5 degrees and over. Covering capacity 10.5 tiles/m2 at 318mm gauge, 9.7 tiles/m2 at 343mm gauge. Weight 46 kg/m2 at 318mm gauge, 43 kg/m2 at 343mm gauge; approximately 1.18 tonnes per pallet and 4.43 tonnes per 1000 tiles. Battens 2.92 m/m2, 38 x 25mm to 450mm rafter centres, 50 x 25mm to 600mm centres.
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Brett Martin Plumbing and Drainage
Brett Martin Cascade cast iron effect rainwater system, four gutter profiles each tied to a specific downpipe: Prostyle 106mm ogee uses a 65mm square downpipe; Roundstyle 112mm half round uses a 68mm round downpipe; Deepstyle 115mm semi-elliptical high capacity uses a 68mm round downpipe; Deepstyle 170mm, the high capacity heritage profile for large roof areas, uses a 105mm round or 100 x 75mm rectangular downpipe. Corner (square section) 68mm downpipes are available for Roundstyle 112mm and Deepstyle 115mm.
- supplier figure RN-01X805
Buckland Timber
Buckland make GL24h glulam from imported timber and GL20h from home grown UK timber, to BS EN 14080:2013. Characteristic values in N/mm2: GL20h bending 20, tension parallel 16, tension perpendicular 0.5, compression parallel 20, compression perpendicular 2.5, shear 3.5, E0,mean 8400, E0,05 700, E90,mean 300, Gmean 650, density 370 kg/m3. GL24h bending 24, tension parallel 19.2, E0,mean 11500, E0,05 9600, density 420 kg/m3. GL28h bending 28, tension 22.3, E0,mean 12600, density 460 kg/m3. GL30h bending 30, E0,mean 13600. Standard widths 100 to 520 mm; appearance grades govern crack tolerance, with top layer cracks up to 2 mm accepted on the middle grade. Span table for simply supported GL24h beams, allowable span in metres by section and load width: 100 x 200 spans 3.22 m as a floor beam at 2 m load width and 3.76 m as a roof beam; 140 x 400 spans 7.20 m floor and 8.41 m roof at 2 m; 160 x 480 spans 9.08 m floor and 10.56 m roof at 2 m, falling to 6.89 m and 8.05 m at 4.5 m load width. Beams available up to 235 x 1600 mm x 25 m.