Kitchens
113 sources in the library on kitchens, 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 3.
- very strong RN-5CL50F cited
Building Control Northern Ireland
The index of Northern Ireland's Technical Booklets, the devolved equivalent of England's Approved Documents, and the place to check which NI booklet answers a question. The booklets run B materials and workmanship, C site preparation and resistance to contaminants and moisture, D structure, E fire safety, F1 conservation of fuel and power in dwellings (2022 edition) and F2 for buildings other than dwellings, G sound, H stairs ramps and guarding, J solid waste, K ventilation, L combustion appliances and fuel storage, M physical infrastructure for high speed electronic communications networks, N drainage, P sanitary appliances and unvented hot water storage, R access to and use of buildings, and V glazing. Amendment booklets AMD7 (amends B, C and E), AMD8 (amends R) and AMD9 (amends E and R) carry the live changes, so the base 2012 booklets must be read with them.
- very strong RN-JQOHMG cited
Drinking Water Inspectorate
The drinking water regulator's announcement of its 2025 annual report for England. It states that public supplies met regulatory standards in 99.97% of over 3.5 million tests.
Cited in Boiling Water Taps & Filtered Taps.
- very strong RN-2PCYXZ cited
Drinking Water Inspectorate
The regulator's account of lead pipework, useful for any period-property or plumbing note. States that before 1970 lead pipework was commonly used to connect properties to the mains, that its use has since been banned, and that a home built before 1970 may have lead pipes while one built after 1970 is unlikely to. Gives a homeowner identification test at the internal stop tap: unpainted lead appears dull grey, often with a swollen joint next to the tap, and is soft enough that a gentle scrape with a coin shows shiny silver metal beneath, with disposable gloves worn and dust not inhaled; contrasts copper as bright, hard and dull brown, iron as dark, very hard and possibly rusty, and plastic as typically blue, or grey or black if older. Explains that lead dissolves while water stands in the pipe, with concentration depending on standing time, pipe condition, temperature (more dissolves in summer and autumn) and water hardness, since harder water forms a protective scale. Notes that water companies dose with orthophosphate where a risk exists, and that a less common cause is the illegal use of lead-based solder on copper pipe, lead solder remaining permitted only in closed central heating systems. Warns lead accumulates in the body, with infants including unborn babies and children most at risk of effects on mental development, and adults at risk of kidney, heart and circulatory harm.
Cited in Renovating a 1930s House.
- very strong RN-81EIUN cited
GOV.UK
The government's own list of alterations that need building regulations approval, and the page to cite when a reader asks whether a bathroom or kitchen refit is notifiable. Works listed as needing approval include installing a bathroom that will involve plumbing, changing electrics near a bath or shower, replacing a fuse box and connected electrics, replacing windows and doors, replacing roof coverings, installing or replacing a heating system, adding radiators to an existing heating system, and installing fixed air conditioning. Emergency repairs to a boiler or heating system do not need approval in advance, though specific rules then apply. Approval may be obtained from a local authority building control department, a private registered building control approver, or, for higher-risk residential buildings, the Building Safety Regulator. The page states the practical consequence bluntly: without approval you will not have the certificates of compliance you may need when you want to sell your home. Note that a like-for-like bathroom refit with no new plumbing, no drainage change and no work in the electrical zones is not on the list.
Cited in Building Control Inspections Explained, Lintels: Types & Sizing, Renovating a 1930s House, Replace Shower Pan Cost: 2026 UK Price Guide and 1 more.
- very strong RN-EOTIF1 cited
Health and Safety Executive
HSE's May 2026 press release on engineered stone: it states that engineered stone used in kitchen worktops can contain up to 95% crystalline silica.
- very strong RN-DNUV4Q cited
Health and Safety Executive
HSE guidance aimed squarely at worktop installers. It states that respirable crystalline silica is present in most rocks, sands and clays and in products such as bricks, tiles and concrete, and that breathing stone dust containing RCS causes silicosis, lung cancer and chronic obstructive pulmonary disease. The controls it names are water suppression, or on-tool extraction with a shroud and dust collector attached to an M-class vacuum, and it warns against dry sweeping dust and debris or anything else that makes dust go airborne. For respiratory protection it specifies a face mask such as an FFP3 with an assigned protection factor of at least 20, meaning it reduces the dust inhaled by a factor of 20. Cite it when a note tells a reader what to ask a worktop fitter about site cutting.
Cited in Kitchen Worktops Compared: Quartz, Granite, Laminate.
- very strong RN-VEGC3Y cited
Health and Safety Executive
HSE's stoneworking FAQ gives the workplace exposure limit for respirable crystalline silica as 0.1 mg/m3, and notes that reducing exposure below the WEL alone may not amount to adequate control in most cases. It gives silica content by stone type: limestone usually, but not always, below 2 per cent; marble typically below 5 per cent although it can be as high as 30 per cent; and engineered or artificial marble may be as high as 30 per cent. This is the citation for why cutting and shaping an engineered stone worktop on site is a controlled activity and why a fabricator should be cutting wet rather than dry.
Cited in Kitchen Worktops Compared: Quartz, Granite, Laminate.
- very strong RN-G9LT14 cited
Health and Safety Executive (HSE)
The HSE's guidance on engineered stone specifically, which matters because quartz worktops carry a far higher crystalline silica content than granite or laminate. It defines engineered stone as artificial stone manufactured from crushed natural stone or minerals bonded with resin, and notes that cutting or drilling it creates dust, the respirable fraction of which is respirable crystalline silica. The control steps it lists for cutting, grinding and polishing engineered stone with powered handheld rotary tools are: work with stone containing the lowest crystalline silica content available; use powered air purifying respirators with an assigned protection factor of at least 20 when processing, cleaning or maintaining machinery; and provide health surveillance for workers regularly exposed to RCS dust where there is a reasonable likelihood that COPD or silicosis may develop. It points to COSHH essentials for stoneworkers sheet ST3A for the detailed guidance. This is the citable basis for advising a reader to ask a fabricator about silica content and wet cutting rather than treating quartz as a purely aesthetic choice.
Cited in Kitchen Worktops Compared: Quartz, Granite, Laminate.
- very strong RN-QD1SFF cited
Ministry of Housing, Communities and Local Government
Table 1.1 sets minimum intermittent extract rates: kitchen with a cooker hood extracting outside 30 l/s, kitchen without one 60 l/s, utility room 30 l/s, bathroom 15 l/s, sanitary accommodation 6 l/s. Extract terminals and fans other than cooker hoods should be as high as practicable and no more than 400mm below the ceiling; a cooker hood should sit between 650mm and 750mm above the hob if the manufacturer gives no figure. Table 1.7 requires background ventilators of at least 8000mm2 equivalent area in habitable rooms and kitchens for a dwelling, 10,000mm2 for a single-storey dwelling. Background ventilators should be at least 1700mm above floor level and at least 500mm from a fan in the same room. On replacement windows, paragraph 3.14 says new windows must carry background ventilators no smaller than the originals, and paragraph 3.15 gives the fallback minimums where the old size is unknown: 8000mm2 habitable rooms, 8000mm2 kitchen, 4000mm2 bathroom. Paragraph 3.32 confirms that replacing an extractor fan or cooker hood on existing cabling is not notifiable.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, All You Need To Know About Double Glazing Repairs, Annexe & Granny Flat: Cost, Planning & Rules, Basement & Cellar Conversions: Cost and 57 more.
- very strong RN-NUBKZ8 cited
Ministry of Housing, Communities and Local Government
The 2026 edition of Approved Document F Volume 1, supporting Requirement F1 and regulations 39, 40C, 42 and 44. It takes effect on 24 March 2027 in England for building work not connected with higher-risk building work, and on 24 September 2027 for work in connection with higher-risk building work, with transitional arrangements in Circular Letter 01/2026. The extract rates are unchanged from the 2021 edition: paragraph 1.13 requires extract to outside in kitchens, utility rooms, bathrooms and sanitary accommodation, and Table 1.1 keeps 30 l/s for a kitchen with a cooker hood extracting outside, 60 l/s where there is no hood or the hood does not extract outside, and 30 l/s for a utility room. Paragraph 1.16 keeps extract terminals within 400 mm of the ceiling and 1.17 keeps the cooker hood 650 to 750 mm above the hob. Paragraph 1.11 states background ventilator sizes are given as an equivalent area in mm2, not free area, measured to BS EN 13141-1, and 1.12 requires that equivalent area to be marked visibly from inside.
Cited in Trickle Vents & Background Ventilation.
- very strong RN-YAW64M cited
Ministry of Housing, Communities and Local Government
Requirement G3(4) states the hot water supply to any fixed bath must be designed so the water delivered to that bath cannot exceed 48 degrees C; paragraph 3.65 says this is achieved with an in-line blending valve or other temperature control device with a maximum temperature stop, and 3.66 accepts valves to BS EN 1111:1999 or BS EN 1287:1999 that fail safe. G3(3) requires unvented storage vessels to prevent stored water exceeding 100 degrees C and to convey safety discharge somewhere visible and safe. Regulation 36 and Requirement G2 cap potential consumption in a new dwelling at 125 litres per person per day, or the optional 110 litres per person per day where a planning condition specifies it; G2 applies only to dwellings erected or formed by material change of use. Sections G4 sanitary conveniences, G5 bathrooms and G6 food preparation areas set scale of provision.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Basins & Vanity Units: A Buyer's Guide, Bathroom Layouts & Planning, Boiler Replacement & Central Heating Costs (UK) and 7 more.
- very strong RN-XH6E39 cited
Ministry of Housing, Communities and Local Government
The standard that decides whether a loft ladder is legal and when a raised deck needs a balustrade. Published 3 January 2013, it covers protection from falling, collision and impact including stairs, ladders, ramps, guarding and vehicle barriers. Paragraph 1.31 states that retractable ladders must not be used as a means of escape. Paragraph 1.32 permits a fixed ladder, with fixed handrails on both sides, only for access in a loft conversion containing one habitable room, and only where there is not enough space without altering the existing space for a compliant stair, which is the rule that catches most loft ladder installations. Paragraph 1.29 restricts alternating tread stairs to loft conversions. For a private stair the maximum pitch is 42 degrees (Table 1.1 note 1), the normal relationship between rise and going is twice the rise plus the going between 550mm and 700mm, and for dwellings external tapered steps forming part of the building need a going of at least 280mm. Paragraph 3.1 requires guarding wherever it is reasonably necessary for safety at the edge of a floor, gallery, balcony, roof, light well, basement or similar sunken area. Paragraph 3.2 requires guarding to be at least the height in Diagram 3.1, allows any wall, parapet or balustrade to serve as guarding, and requires it to resist the loads in BS EN 1991-1-1 with its UK National Annex and PD 6688-1-1, with BS 6180 for barrier and infill panel design. Handrails should be positioned 900mm to 1000mm from the pitch line or floor.
Cited in All You Need To Know About Double Glazing Repairs, Basement & Cellar Conversions: Cost, Basement Conversion Cost & Feasibility (UK), Bifold Doors: Cost, Sizes & Alternatives and 56 more.
- very strong RN-5IVIKF cited
Ministry of Housing, Communities and Local Government
Paragraph 1645 of the M4(2) guidance requires a minimum 1,200 mm clear space in front of and between all kitchen units and appliances in living, kitchen and eating areas. Wall switches, socket outlets, stopcocks and controls must have their centre line between 450 mm and 1,200 mm above floor level (Diagram 1.5), consumer units are mounted with switches 1,350 to 1,450 mm above floor level, and boiler timer controls and thermostats between 900 mm and 1,200 mm. Communal approach routes and flights need a minimum clear width of 1,200 mm and every landing a minimum 1,200 mm clear of any door swing. Handrail guidance is measured 450 mm above the pitch line of the treads.
Cited in Bathroom Layouts & Planning, Bathroom Storage Solutions, Bathroom Tiles: Types, Cost & Layout, Creating a Downstairs Toilet: Cost & Rules and 16 more.
- very strong RN-JYJ3I5 cited
Ministry of Housing, Communities and Local Government
The document that decides what electrical work a homeowner may legally do themselves, and the exact list of notifiable jobs. Regulation 12(6A), reproduced at paragraph 2.5, makes only three things notifiable: the installation of a new circuit, the replacement of a consumer unit, and any addition or alteration to existing circuits in a special location. Regulation 12(9) defines special location as, in a room containing a bath or shower, the zone extending vertically from finished floor level to 2.25 metres (or the shower head position if higher) and horizontally 600mm from the edge of the bath tub or shower tray. Paragraph 2.7 states that all other electrical installation work is not notifiable, namely additions and alterations to existing installations outside special locations, and replacements, repairs and maintenance anywhere. Paragraph 2.8 gives worked examples: a built-in cooker is not notifiable unless a new cooker circuit is needed, and connecting an electric gate or garage door to an existing isolator is not notifiable but running a new circuit from the consumer unit to that isolator is. Paragraph 2.2 confirms Part P reaches outdoor work including fixed garden lighting, pond pumps and outbuildings such as sheds, detached garages and domestic greenhouses. Notifiable work must be certified by self-certification by a registered competent person, third-party certification, or a building control body (paragraph 3.1), with the compliance certificate issued within 30 days (paragraph 3.4). Note that Approved Document P is a source of guidance rather than a ban: non-notifiable work still has to comply with BS 7671.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Adding Plug Socket Room Cost: 2026 UK Price Guide, Annexe & Granny Flat: Cost, Planning & Rules, Awning Installation Cost: Patio & Garden Awnings and 114 more.
- very strong RN-LFIIEJ cited
Ministry of Housing, Communities and Local Government
the nationally described space standard, which sets the minimum gross internal areas, bedroom sizes, built-in storage and, at paragraph 10(i), the minimum floor to ceiling height of 2.3m over at least 75% of the gross internal area that a local plan may require of new homes
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Garage Conversion Cost & Ideas (UK), House Extension Design Ideas, L-Shaped Dormer Loft Conversions: Cost & Layout and 5 more.
- very strong RN-QIJ7RL cited
Planning Portal
The Planning Portal's guide to internal walls. It says building regulations normally apply when you remove an internal wall or form an opening in one, particularly a load-bearing wall.
- very strong RN-LIQ6ZI cited
Scottish Government (gov.scot)
Scotland's ventilation guidance under the Building (Scotland) Regulations 2004, and the source for extract rates north of the border. Clause 3.14.3 sets mechanical extraction of at least 30 litres per second intermittent above a hob, or at least 60 litres per second intermittent if elsewhere, for a kitchen; at least 30 litres per second intermittent for a utility room; at least 15 litres per second intermittent for a bathroom; and at least 3 air changes per hour for a toilet. Clause 3.14.1 states there is no need to ventilate a room with a floor area of not more than 4 square metres, expressly excluding a domestic sized kitchen or utility room. Clause 3.14.5 covers spaces designated for drying washing, which need either mechanical extraction of at least 15 litres per second intermittent with the fan connected through a humidistat set to activate when relative humidity is between 50 and 65 per cent, or a passive stack system. Trickle ventilator areas assume infiltration of 5 to 10 m3/h/m2 at 50 Pa; below 5 the tabulated areas may not suffice and an alternative strategy is needed, and where a trickle ventilator is ducted the recommended areas should be doubled. Where an extract fan is fitted in a building containing an open-flued combustion appliance, extract rates should be reduced, referring to Standard 3.17 and OFTEC Technical Book 3.
Cited in Trickle Vents & Background Ventilation.
- very strong RN-AN32K1 cited
The National Archives (legislation.gov.uk)
The retained energy labelling regulation for range hoods. Annex IV sets the product fiche, which must give the hood's A-weighted sound power in dB at minimum and maximum normal-use speed.
Cited in Cooker Hoods & Kitchen Extraction.
- very strong RN-CC1O5H cited
The National Archives (legislation.gov.uk)
Schedule 4 lists building work that needs no building notice; item (g) covers a self-contained fixed service that is not a combustion appliance other than a fixed flueless gas cooker, so a flueless hob is exempt but flued appliances are not.
Cited in Hot Water Cylinders: Vented vs Unvented, How to Fit a Bathroom Suite, Kitchen Islands: Sizes, Cost & Services, Kitchen Layout Ideas: Galley, L-Shape & Island and 6 more.
- very strong RN-8FEFU5 cited
The National Archives (legislation.gov.uk)
Regulation 4 of the Water Supply (Water Fittings) Regulations 1999 as it applies in England and Wales. It requires every water fitting to be of an appropriate quality and standard and suitable for its use.
Cited in Basins & Vanity Units: A Buyer's Guide, Boiling Water Taps & Filtered Taps, Choosing Bathroom Taps & Brassware, How to Fit a Bathroom Suite and 2 more.
- very strong RN-IKLPS9 cited
The National Archives (legislation.gov.uk), UK Statutory Instrument 1999/1148
The exact list of plumbing work that must be notified to the water undertaker, with its consent obtained, before it begins. Regulation 5(1) requires notice, consent not to be unreasonably withheld, and compliance with any conditions. The Table item 4 covers installing: (a) a bath over 230 litres measured to the centre line of overflow; (b) a bidet with ascending spray or flexible hose; (c) a single shower unit of a type specified by the regulator connected directly or indirectly to a supply pipe; (d) a pump or booster drawing more than 12 litres per minute connected directly or indirectly to a supply pipe; (e) reverse osmosis; (f) a water treatment unit producing waste water; (g) an RPZ valve or other device for fluid category 4 or 5; (h) a garden watering system not operated by hand; (i) any water system laid outside a building less than 750mm or more than 1350mm below ground. Item 5 covers construction of a pond or swimming pool over 10,000 litres designed to be replenished by automatic means from a water undertaker's supply. Regulation 5(2) exempts approved contractors for items 2, 4(b) and 4(g).
Cited in Pond Fibreglassing Cost: 2026 UK Price Guide, Rain Shower Price Cost: 2026 UK Price Guide.
- very strong RN-4MRYEN cited
The National Archives (legislation.gov.uk), UK Statutory Instrument 1999/1148
The substantive requirements every water fitting in England, Wales and Northern Ireland must meet, and the source of several hard numbers. Paragraph 25(d) caps a single flush from a WC flushing device at 6 litres (7.5 litres under the transitional wording at paragraph 25 as originally applied). Paragraph 17 requires safety devices on every unvented water heater other than an instantaneous heater of 15 litres capacity or less, and on every secondary coil in a primary system. Paragraph 23(1) requires a temperature relief valve or combined temperature and pressure relief valve on every unvented hot water storage vessel with a capacity greater than 15 litres. Paragraph 5 requires every fitting to withstand an internal pressure of not less than 1.5 times its maximum design pressure. Water efficiency limits are also fixed here: 27 litres per kilogram of washload for domestic horizontal axis washing machines on a standard 60 degrees C cotton cycle, 48 litres per kilogram for washer driers, and 4.5 litres per place setting for domestic dishwashers.
Cited in Outdoor Kitchens: Cost & Planning, Toilets Explained: Close-Coupled, Wall-Hung & Rimless, Unblocking Toilet Cost: 2026 UK Price Guide.
- very strong RN-KXCXCY cited
Welsh Government (gov.wales)
WALES. First published 3 April 2017, last updated 7 April 2026. Wales publishes its own Approved Document F, and the page carries the current volume 1 for dwellings (910 KB PDF) and volume 2 for buildings other than dwellings, plus replacement volumes that TAKE EFFECT ON 4 MARCH 2027, the same changeover date as the Welsh Approved Document L and distinct from England's 24 March 2027. Welsh Part F diverged from England's when England issued its 2021 edition alongside Part L and Part O, so extract rates and background ventilator provisions for a Welsh bathroom, kitchen or loft conversion should be taken from this document rather than from England's Approved Document F.
Cited in Trickle Vents & Background Ventilation.
- strong RN-FVSJVE cited
BSI
BSI catalogue entry for BS 6172, the British Standard for installing, servicing and maintaining domestic gas cooking appliances; it confirms the standard and its subject only.
Cited in Splashbacks: Glass, Tile & Stone Options, Worktop Edges, Upstands & Splashbacks.
- strong RN-TL1I4R cited
BSI
BS EN 12004-1:2017, published 28 February 2017, committee B/539, prepared by CEN/TC 67 Ceramic tiles, current; it supersedes BS EN 12004:2007+A1:2012. The scope covers three types of ceramic tile adhesive: cementitious for internal and external installations, and dispersion and reaction resin for internal installations only, on walls and floors. It gives the terminology for the products, working methods and application properties, specifies the performance requirements and the appurtenant test methods, the assessment and verification of constancy of performance, and the classification, designation and marking of tile adhesives, which is where the C, D and R type letters and class numbers on a bag of adhesive come from. It expressly does not provide criteria or recommendations for the design and installation of ceramic tiles, which is BS 5385. It notes tile adhesives may also be used for natural and agglomerated stones if they do not adversely affect the material. BS EN 12004-2:2017 gives the test methods.
Cited in Bathroom Tiles: Types, Cost & Layout, Grab Adhesive & Construction Adhesives, How to Tile a Wall or Floor, Tile Adhesive & Grout Explained and 2 more.
- strong RN-VKPEGH cited
BSI (British Standards Institution)
STATUS: CURRENT (marked Under Review). BS EN 12150-1:2015+A1:2019 was published 31 May 2019 and supersedes BS EN 12150-1:2015, which had itself replaced BS EN 12150-1:2000. It establishes tolerances, flatness, edgework, fragmentation and the physical and mechanical characteristics of monolithic flat thermally toughened soda lime silicate safety glass for use in buildings. Curved toughened glass is described in Annex A but is not part of the standard, and glass built into laminated or insulating glass units, or coated after toughening, falls under the relevant assembly product standard instead. Part 2 (BS EN 12150-2) covers evaluation of conformity. The catalogue page confirms number, title, date, status and scope; the test detail is paywalled.
Cited in Splashbacks: Glass, Tile & Stone Options, Worktop Edges, Upstands & Splashbacks.
- strong RN-7ZODEU cited
BSI Knowledge
BSI's catalogue record for BS 6222-1:1982. It shows the standard's title and that it was withdrawn on 15 April 1996.
Cited in Kitchen Layouts: Galley, L, U & Island.
- strong RN-0BO72H cited
BSI Knowledge
Published 15 September 2000 and current. This is the standard behind soil and waste pipe sizing and layout inside a house, and the document that replaced the withdrawn BS 5572 code of practice for sanitary pipework on the same date. It applies to wastewater drainage systems operating under gravity in dwellings and in commercial, institutional and industrial buildings, and sets out the principles to be followed for both layout and calculation of sanitary pipework, with only limited provisions for trade effluent and pumped fluids. It sits alongside BS EN 12056-1 for general and performance requirements, -3 for roof drainage, -4 for wastewater lifting plants and -5 for installation, testing and maintenance. Cite it, with Approved Document H, when a note gives soil stack or branch waste pipe diameters, trap seal depths or branch gradients.
Cited in Install A Macerating Toilet Cost: 2026 UK Price Guide.
- strong RN-GTCR9U cited
Water Regulations Approval Scheme
Sets out that WRAS checks testing of water fittings for compliance with the Water Supply (Water Fittings) Regulations and the Scottish Byelaws, which impose a legal duty on everyone to use suitable water fittings when connected to a public water supply, covering pipes, fittings, taps, showers, washing machines, dishwashers, coffee machines, boilers and toilets. States plainly that a WRAS approval itself is not mandatory but the testing is, so the point of the approval is proof that the required material and mechanical tests were passed, including that a product will not affect the taste or smell of drinking water or promote microorganism growth. Every approved fitting carries requirement and installation notes stating conditions of use, for example cold water only. Non-compliant fittings may have to be replaced and can lead to prosecution and a fine; cites British insurers' data that a burst pipe repair claim in freezing weather costs on average 8,800 pounds.
Cited in Basins & Vanity Units: A Buyer's Guide, Boiling Water Taps & Filtered Taps.
- strong RN-72PO4Y cited
Water Regulations Approval Scheme Ltd
WRAS describes itself as the Water Regulations Approval Scheme, a certification body whose approval is a way of demonstrating that plumbing products comply with the water fittings regulations.
Cited in Kitchen Taps & Sinks: Buyer's Guide.
- strong RN-JDN21B cited
WRAS Approvals Ltd
The certification scheme whose approval mark on a tap, shower, pump or cylinder demonstrates compliance with the water fittings regulations. WRAS describes itself as an independent UK certification body for plumbing products and materials accredited to ISO 17065, with more than 8,000 approved products in its directory. Approvals are searchable by seven digit WRAS approval number, company or keyword, and the public directory covers products and materials approved in the last five years, so an expired or absent listing is itself a finding. The scheme runs both product approvals and material approvals and operates a laboratory recognition programme for the accredited test houses.
Cited in Choosing Bathroom Taps & Brassware.
- good RN-5MTP2P cited
British Woodworking Federation
BWF guidance on timber durability and specification. States that where national requirements and end use are not available, the moisture content of the timber shall not exceed 13% for heated buildings or 16% for use in unheated buildings. Useful as the ceiling figure against which the common trade rule of thumb of 8 to 12% kiln-dried moisture content for kitchen worktops and interior joinery can be sanity-checked.
Cited in Butcher Block Countertop Cost: 2026 UK Price Guide, Timber Cladding: Species, Treatment & Cost.
- fair RN-ZFPIX5 cited
Love Food Hate Waste (WRAP)
WRAP's consumer food-waste campaign explaining updated storage advice. It settles that raw potatoes are now best kept in the fridge below 5°C rather than in a cool cupboard.
Cited in Pantries & Larders: Design & Cost.
- fair RN-9S3EZ5 cited
National Kitchen and Bath Association (hosted by NKBA Puget Sound chapter)
The NKBA's own kitchen planning guidelines (guidelines 6 and 7): work aisle at least 42 in for one cook and 48 in for several, walkway at least 36 in. It is the primary text of a US trade body's guidance, hosted by an NKBA chapter.
Cited in Kitchen Islands: Sizes, Cost & Services.
- fair RN-AMKA0J cited
US Environmental Protection Agency
The US EPA's statement on granite countertops: data do not show they significantly raise indoor radon, and soil is the principal source of radon in homes. No equivalent UKHSA page could be fetched.
- fair RN-FTECMH cited
Which?
Which?'s kitchen cost guide, based on BCIS data and a member survey. It says labour makes up roughly 20 to 30% of the total when none of the installation is done by the homeowner.
- supplier figure RN-QOH38R cited
AKG Surfaces
AKG Surfaces publishing its own price guidance for this work. A trade supplier writing about what it charges is evidence of the market rate and not a quotation, and the cost book treats it as one figure among several rather than on its own
Cited in Kitchen Islands: Sizes, Cost & Services, Kitchen Worktops Compared: Quartz, Granite, Laminate.
- supplier figure RN-6QYORM cited
BSH Home Appliances (Bosch)
Bosch's UK specification sheet for a standard 60 x 60 cm built-in single oven gives the appliance as 595 x 594 x 548 mm and the required niche as 585-595 mm high, 560-568 mm wide and 550 mm deep. Maker's own product data; the site is not on the maker allowlist.
Cited in Kitchen Appliances: Built-in vs Freestanding Planning.
- supplier figure RN-XCO6OS cited
Builder Depot
Merchant product page for a widely used 3 kg epoxy grout, giving the current price including VAT and describing its resistance to acids, bacteria and mould.
Cited in Splashbacks: Glass, Tile & Stone Options.
- supplier figure RN-PDZJFO cited
Cawdor Worktops
Cawdor Worktops publishing its own price guidance for this work. A trade supplier writing about what it charges is evidence of the market rate and not a quotation, and the cost book treats it as one figure among several rather than on its own
Cited in Butcher Block Countertop Cost: 2026 UK Price Guide, How Much Does a New Kitchen Cost in 2026? (UK), Kitchen Worktops Compared: Quartz, Granite, Laminate, Splashbacks: Glass, Tile & Stone Options.