Cladding & Render
129 sources in the library on cladding & render, 31 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 4.
- fair RN-0B2059 cited
International ThermoWood Association
The ThermoWood trademark owner's technical handbook. It describes the three process phases, including high-temperature drying with controlled heating to prevent cracking.
Cited in Thermowood Cladding Cost: 2026 UK Price Guide, Timber Cladding: Species, Treatment & Cost.
- fair RN-ZMUQLN cited
International ThermoWood Association
The ThermoWood trademark owner's product page. It defines Thermo-S (stability) and Thermo-D (durability) and lists exterior cladding as a Thermo-D use.
- supplier figure RN-K3ZW3Y cited
British Board of Agrément (published by Insta Group)
The BBA certificate for a rendered EWI system. It gives a service life of at least 30 years (60 with planned maintenance), 100 mm mesh laps, mesh in the top third of the basecoat and 250 x 450 mm diagonal patches at openings.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-DH67H7 cited
British Board of Agrément (published by Wetherby Wall Systems)
The BBA certificate for a rendered EWI system. It sets 30- or 60-year durability, requires stainless corner profiles for 60 years unless embedded, carries substrate movement joints through, and gives mesh laps and opening patches.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-HHQGA6 cited
British Board of Agrément (published by Wetherby Wall Systems)
The BBA certificate for a stone-wool EWI system. It requires mesh laps of at least 75 mm and diagonal stress patches of about 300 x 250 mm at the corners of openings, with a service life over 30 years.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-Y69Y7T cited
Cedral (Etex)
The fixing guide Cedral publishes for its own fibre cement facade boards. It sets the ventilated cavity depth, batten size and spacing the manufacturer requires behind lapped planks.
Cited in Fibre Cement Cladding & Boards Explained.
- supplier figure RN-A4RC8G cited
Cedral (Etex)
Cedral's UK cladding range page, which states a minimum life expectancy of 50 years for its fibre cement facades and says they need no regular repainting.
Cited in Fibre Cement Cladding & Boards Explained.
- supplier figure RN-ZGXRB9 cited
EQUITONE (Etex)
A fibre cement panel maker's material information sheet. Its composition section lists cement, quartz sand, cellulose, mineral filler and pigments.
Cited in Fibre Cement Cladding & Boards Explained.
- supplier figure RN-6IIMMP cited
EWI Store
A specialist EWI supplier's product page for a 50 m² roll of 145 g/m² fibreglass render mesh, with its price including VAT. It supports the per m² figure in the 145 g/m² mesh row.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-PI1IXO cited
EWI Store
A specialist EWI supplier's product page for a 2.5 m uPVC render corner bead with mesh. It gives the regular price including VAT, which sets the low end of the EWI angle bead row.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-4JUCDX cited
Hanson (Heidelberg Materials UK)
Maker's data sheet for hydrated lime (CL 90-S): it improves plasticity, workability and water retention of Portland cement mortars and renders, with a table of cement:lime:sand designations.
- supplier figure RN-JIYLQJ cited
James Hardie
Medium density fibre cement weatherboard with a ColourPlus finish. Thickness 8 mm, length 3600 mm, width 180 mm with a 150 to 180 mm visible surface. Weight 7.4 kg per piece; 1.85 pieces per m2 including overlap. Fire Classification A2-s1, d0. Cedar or smooth texture, 21 standard colours.
Cited in House Cladding Cost: 2026 UK Price Guide.
- supplier figure RN-CK4ESG cited
James Hardie Europe
The UK site of a major fibre cement board maker, stating that its cladding is backed by a 15-year warranty, an example of the warranty length on factory-finished boards.
Cited in Fibre Cement Cladding & Boards Explained.
- supplier figure RN-M90PNK cited
K Rend (hosted by Selco Builders Warehouse)
K Rend's data sheet for its silicone thin-coat render, used as an EWI finish. It lists grain sizes of 1.0, 1.5 and 3.0 mm applied to the thickness of the largest grain, and a water-repellent finish.
- supplier figure RN-GYX4KM cited
K Rend (Kilwaughter Minerals)
K Rend's product guide describes its silicone thin coat range as ready-to-use resin renders applied over a primer and base coat, suited to external wall insulation systems.
Cited in House Rendering Cost: Whole-House Render Prices (2026).
- supplier figure RN-CVW55A cited
K Rend (Kilwaughter Minerals)
Water repellent, cement based, polymer modified self coloured render supplied in 25 kg sacks, Kitemarked and CE marked to BS EN 998-1:2010. Mixing 4 to 5 litres of clean water per 25 kg sack, 10 minutes mixing, open time approximately one hour. One coat coverage 1.6 kg per mm thickness per m2; one coat requires approximately 26 to 32 kg/m2 at a nominal 16 to 20 mm thickness, normally applied in two passes. Kitemark classifications: compressive strength CS II, capillary water absorption category W2, thermal conductivity P=50% 0.43. Applied with a 12 mm or 14 mm mortar nozzle, levelled to 4 to 8 mm per pass, with most finishes at a recommended finished thickness of 12 to 14 mm and a minimum 10 mm of coloured K Rend left.
Cited in House Rendering Cost: Whole-House Render Prices (2026).
- supplier figure RN-SDYZZ4 cited
Kingspan Insulation
Kingspan's declaration of performance for Kooltherm K5, the phenolic external wall insulation board. It declares thermal conductivity of 0.021 to 0.022 W/mK and reaction to fire class C-s2,d0.
- supplier figure RN-K95IWD cited
Lunawood
A thermally modified timber producer's product fact sheet. It gives Thermo-D durability class 2 under BS EN 350 and a BRE-endorsed 30-year service life as cladding.
Cited in Cladding and Render: The Complete UK Guide (2026), Thermowood Cladding Cost: 2026 UK Price Guide, Timber Cladding: Species, Treatment & Cost.
- supplier figure RN-DRCAA9 cited
Lunawood
A producer's cladding maintenance guide. It recommends pigmented oils, waxes, stains or paints with a UV filter to keep the colour, renewed as needed.
- supplier figure RN-7GC6NL cited
Renderplas Ltd
A UK maker's product page for PVCu bellcast beads. It says they stop the render just above the damp-proof course and above reveals, giving a straight edge that deflects rainwater.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-FHILUX cited
Renderplas Ltd
A UK bead maker's page for its PVC corner and angle beads. It states the beads are fitted to rendered corners and reveals to give a straight edge and protect it against impact.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-G5N50I cited
Renderplas Ltd
A UK bead maker's range of PVC beads for thin-coat render over external wall insulation. Its product table lists 6 mm corner, reveal and stop beads with 100 mm mesh wings.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-CJ2VLJ cited
Renderplas Ltd
A UK maker's product page for glass-fibre render mesh. It explains the mesh is embedded in the base coat to resist cracking and impact, gives 160 and 220 g/m2 weights, 100 mm laps and diagonal strips at reveals.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-GOZVST cited
Renderplas Ltd
A UK render-bead maker's stop bead range with each bead's matching render depth. It shows a 10 mm bead is used for a 10–12 mm render coat and that sizes run from 4 mm to 15 mm.
Cited in Render Beads, Mesh & Stop Beads.
- supplier figure RN-33S4Z2 cited
Travis Perkins
A national builders' merchant's product page for weber.pral M. It confirms the product is sold in the UK as a through-coloured monocouche render, which the existing K Rend footnote does not cover.
Cited in House Rendering Cost: Whole-House Render Prices (2026).
- supplier figure RN-BCWN3Q cited
Unilin Insulation
A manufacturer's product page for grey graphite-enhanced EPS wall board; it gives thermal conductivity 0.031 W/mK and reaction to fire Euroclass E.
- supplier figure RN-VZJRP8 cited
Vastern Timber
Vastern Timber's Brimstone page. It shows Brimstone is Vastern's own British thermally modified timber, not a distributor of imported product.
- supplier figure RN-8Y321J cited
Vastern Timber
A cladding supplier's fixing specification guidance. It says to use stainless steel throughout, A2 for general external use and A4 in coastal, exposed or polluted sites.
- supplier figure RN-CTJ13D cited
Vastern Timber
A cladding supplier's batten guidance. It says primary battens should be at least twice the board thickness (40 mm for 20 mm boards) with airflow at the top and bottom of the cavity.
- supplier figure RN-XGI2P5 cited
Vastern Timber
A UK timber cladding supplier's product page. It gives supply prices for cladding boards of £25 to £90 per m2 plus VAT depending on species and profile.
- supplier figure RN-O8GLEB cited
Wienerberger UK
A UK brick manufacturer's brick slip product page; it gives a standard slip thickness of 22 mm and explains cut and purpose-made slips.
Cited in Brick Slips & Brick Cladding Systems, House Cladding Cost: 2026 UK Price Guide.
- very strong RN-6PSUIL
Department of Finance, Northern Ireland (Building Control NI)
The Northern Ireland U-value standards, which differ from England's Approved Document L and are the figures to quote for an NI reader. Table 2.2 gives limiting U-values for new dwellings in W/m2K as area-weighted averages: wall 0.18, floor 0.18, roof 0.16, party wall 0.00, and windows, roof windows, glazed rooflights, curtain walling and pedestrian doors 1.40. Column (b) sets the maximum U-value at any point: 0.60 for wall, floor and party wall, 0.30 for roof and 3.00 for windows and doors. Where space heating is underfloor heating the maximum floor U-value tightens to 0.15 W/m2K, and that 0.15 still applies even under the whole-building trade-off route in paragraph 2.44. Table 3.2, for new thermal elements in existing dwellings, gives wall 0.28, pitched roof with insulation at ceiling level 0.16, pitched roof with insulation at rafter level 0.18, flat roof or roof with integral insulation 0.18, floor 0.22 and swimming pool basin 0.25. Maximum permissible air permeability is 10 m3/(h.m2) at 50 Pa, with 5 or less expected in practice, and below 3 the booklet says alternatives to natural ventilation should be considered. Roof window and rooflight U-values are quoted as assessed in the vertical position and must be adjusted in accordance with BR 443 where assessed in another plane. Regulation 43 requires that where renovation of a thermal element amounts to more than 50 per cent of its surface area, the whole element is brought up to standard.
- very strong RN-MMEX1T
Historic Environment Scotland
A free public-body technical guide on damp in traditional buildings, and the accessible route to heritage-grade damp advice because Historic England blocks scripted fetches. Published 1 July 2007 by Historic Environment Scotland, publication type Technical, Advice and Guidance, INFORM Guide, audiences Planners and Owners and Conservation and Heritage enthusiasts, subjects Architecture and Climate Change, downloadable as a 288 KB PDF from the page. Scope stated on the page: recognising the causes and early signs of damp, and guidance on rectifying damp problems. Use it as the counterweight to damp-proofing sales literature, since HES guidance for solid-walled traditional buildings does not start from the chemical injected damp proof course assumption that dominates UK damp articles. Note the jurisdiction: it is Scottish guidance, so the building science transfers but any regulatory reference does not.
- very strong RN-HIUMHY
Historic Environment Scotland
The public-body source for why cement mortar on a traditional stone or soft brick wall causes decay, published 13 October 2016 by Historic Scotland (now HES), INFORM Guide, 377 KB PDF. Scope stated on the page: it focuses on the two commonly used mortar types, lime mortars and cement mortars, gives an overview of the physical properties of both, and indicates their technical suitability for use with traditional stone masonry, on the basis that selecting a suitable mortar for repair works matters for conservation and for PREVENTING MASONRY DECAY ASSOCIATED WITH THE USE OF INCOMPATIBLE MATERIALS. Pair it with the HES Short Guide: Lime Mortars in traditional buildings (1 March 2013, 2.16 MB PDF), which covers the history and use of lime mortars, sourcing of raw materials, preparation of mortars for repairs and how to recognise and reduce the risk of failure, and with the INFORM Guide: Hot-Mixed Lime Mortars (1 April 2015, 4.41 MB PDF), which explains how hot-mixed lime mortars differ from other lime mortars and how they are prepared on site.
- very strong RN-YD9RWJ
Ministry of Housing, Communities and Local Government
Section 10 covers resisting fire spread over external walls, with the sub-sections Combustibility of external walls, Balconies, Metal composite materials, and the guidance on regulation 7(2) and requirement B4. Paragraph 10.3 requires the external walls of buildings other than those described in regulation 7(4) to either follow paragraphs 10.5 to 10.9 on external surfaces and cavities, or meet the alternative route. The 2022 amendments made consequential changes following the Building (Amendment) (England) Regulations 2022 and updated Section 10 for residential buildings in purpose groups 1 and 2 with a storey 11m or more in height, and added recommendations for secure information boxes in blocks of flats with storeys over 11m and evacuation alert systems where storeys are over 18m. The 2020 amendments cut the sprinkler trigger height in blocks of flats from 30m to 11m and added wayfinding signage above 11m.
- very strong RN-GWUUOR
Ministry of Housing, Communities and Local Government
The landing page for Approved Document L, Conservation of fuel and power. Volume 1: Dwellings, 2021 edition incorporating 2023 amendments, took effect 15 June 2022, with transitional cover where a building notice or initial notice was given or full plans deposited before 15 June 2022 and the work started before 15 June 2023. A 2026 edition, retitled Approved Document L: Energy and greenhouse gas emissions, Volume 1: Dwellings, is published on the same page alongside Volume 2 for buildings other than dwellings. Volume 1 was last updated 2 February 2023 and the 2023 amendment removed the primary energy factor as a performance standard for district heat networks and community heating.
- very strong RN-8Y875H
Ministry of Housing, Communities and Local Government
The list of test standards common across product families that UK approved bodies use when assessing construction products, published 27 January 2021 and last updated 21 May 2025, in force from 1 January 2021. Names the specific test methods behind fire performance claims a product data sheet will quote, so a note can verify what a rating actually measures: TS 1187 external fire exposure to roofs; EN ISO 1182 non-combustibility test; EN ISO 1716 gross heat of combustion or calorific value; EN 13823 the single burning item test for building products excluding floorings; EN ISO 11925-2 ignitability under direct flame impingement, the single-flame source test; EN ISO 9239-1 burning behaviour of floorings using a radiant heat source; EN 1365-3 and EN 1365-4 fire resistance of loadbearing beams and columns; EN 1634-1 and EN 1634-3 fire resistance and smoke control for door and shutter assemblies and openable windows; and the EN and ENV 13381 series for applied protection to composite, hollow steel, timber and steel structural members. The latest versions of the standards themselves are on the BSI website.
- very strong RN-FSY9SH
Office for Product Safety and Standards
The searchable national database a reader can use to check whether a specific building product, appliance or tool has been recalled or flagged, run by the Office for Product Safety and Standards. Holds 3,692 reports at the date checked, filterable by alert type (product safety alert, product safety report, product recall), risk level (serious, high, medium, low, not provided), product category, measure type and date. Relevant product categories for renovation work include Construction products, Gas appliances and components, Electrical appliances and equipment, Lighting equipment, Adaptors, plugs and sockets, Hand tools, Machinery, Lifts, Pressure equipment and vessels, Furniture and Personal protective equipment. Measure types range from warning consumers of the risks and marking the product with warnings, through modification programmes and withdrawal from the market, to recall from end users, destruction of the product, import rejected at border and removal of the listing by the online marketplace. Entries carry a reference number and date, for example Sophie Allport Doorstops and Draught Excluders (2608-0008) recalled 13 August 2026.
- strong RN-04DH6J
BBA (British Board of Agrement)
The certification body whose Agrement Certificate is what a note usually means when it says a system is approved, and the page that lists which schemes it actually runs. The BBA's certification team issues certificates for the BBA Agrement, HAPAS (Highways Authority Product Approval Services), European Technical Assessment (ETA), and the Microgeneration Certification Scheme. Alongside product certification it runs certification of people, including the BBA Approved Installer Scheme, the BBA Competent Person Scheme, the BBA Gas Membrane Approved Installer Scheme, TrustMark registration and the BBA PAS 2030 Scheme, plus a Client Managed Inspection Service. Its testing services are also available standalone and include durability, mechanical, physical and structural, weather resistance and wind serviceability, conformance and fit-for-purpose, thermal performance, and onsite testing and trials. An Agrement Certificate is the route by which a product without a harmonised European product standard, such as a tanking membrane, a multifoil or a proprietary EWI system, gets an independently assessed statement of fitness for a stated use.
- strong RN-8QIL1K
BSI
The harmonised product standard for solid timber cladding, which is what a UKCA or CE marked cladding board is declared against. Published 30 Jun 2020, Current, with Designated status for UKCA marking. Its scope defines and specifies the relevant characteristics and the appropriate test methods for solid wood products used as panelling and cladding, including siding, for wall and ceiling panelling for internal use and wall and ceiling cladding for external uses. Because it is the harmonised standard, a cladding board sold without a declaration of performance against it, including thermally modified boards sold as Thermowood, is not being marketed on the same basis as one that is.