Windows, Doors & Glazing
248 sources in the library on windows, doors & glazing, 40 on this page cited in a published note. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 2 of 7.
- good RN-KTGISI cited
Glass and Glazing Federation
The glazing trade body's explanation of BFRC Window Energy Ratings. It confirms the label scale runs from A++ (most efficient) to E.
Cited in Upvc Flush Casement Windows Prices Cost: 2026 UK Price Guide.
- good RN-9GMLMS cited
Glass and Glazing Federation
The glazing trade federation's homeowner guide to windows. It describes a sealed unit as panes separated by a metal or polymer spacer strip around the edge.
Cited in Replacing Misted Double Glazing: 2026 UK Cost Guide.
- good RN-7XK3EQ cited
Passivhaus Trust
The Passivhaus Trust's introduction to the standard: certification needs a space heat demand below 15 kWh/m2.yr modelled in PHPP, achieved with fabric below 0.15 and windows below 0.8 W/m2K.
- fair RN-0JQPZD cited
ASHRAE
A reference sheet from the heating and ventilation engineers' professional body. It gives sensible heat in watts as 1.2 times the airflow in litres per second times the temperature difference.
Cited in Trickle Vents & Background Ventilation.
- fair RN-JI12X2 cited
British Society of Master Glass Painters
The stained glass professional society's page on finding a glass conservator. It points to Icon's list of Accredited Conservator-Restorers and names BSMGP members who hold ACR status.
- fair RN-FRD5VY cited
Energy Saving Trust
Draught proofing costs and savings. Professional draught proofing of windows and doors across a whole house costs around £250, with DIY cheaper. A terracotta chimney pot cap starts at around £150 and also keeps out moisture and birds. Savings: around £55 a year in Great Britain and £80 in Northern Ireland from draught proofing windows, floors and doors, plus around £45 in GB and £60 in NI from draught proofing an unused open chimney. A draught free home is comfortable at a lower setting, and turning a thermostat down from 22 degrees C to 21 degrees C saves £120 a year in GB and £80 in NI. Warns that further draught proofing of an already well sealed home raises the risk of poor indoor air quality.
Cited in Draught-Proofing Your Home: Cheap Wins That Work, Home Energy Audit: DIY Steps, Insulation: The Complete Guide, Insulation Grants 2026: ECO4, GBIS & What You Can Get.
- fair RN-SS1KSR cited
Energy Saving Trust
Glazing performance, life and price. A set of A-rated windows for a semi detached house typically costs around £4,800. Replacing single glazing with A-rated double glazing across a semi detached house saves £85 a year in Great Britain and £140 in Northern Ireland, and cuts 290kg of CO2 a year in GB and 550kg in NI. Triple glazing costs around 20% more than double glazing, justified mainly in cold or noisy locations. Good quality, correctly installed and maintained double glazed units last 20 to 35 years and can go well beyond 35 years where the seals and gaskets are checked and the units kept clean and ventilated.
Cited in Home Energy Audit: DIY Steps, Leaded Window Repair Cost: 2026 UK Price Guide, Secondary Glazing vs New Windows for Old Homes, Triple Glazing: Worth the Cost?.
- fair RN-K80O58 cited
Society for the Protection of Ancient Buildings
SPAB technical advice on caring for leaded lights. It says leaks often come from decomposed glazier's cement and that old cement has been regenerated in situ with linseed oil and turpentine.
- fair RN-O4IZDY cited
West Yorkshire Police
West Yorkshire Police crime-prevention advice on euro cylinders. It names the two nationally recognised cylinder standards, TS 007 (1 or 3 star) and Sold Secure Diamond SS312.
Cited in How to Change Upvc Door Lock.
- fair RN-G3DCPG cited
Which? Trusted Traders
Which? Trusted Traders locksmith cost guide. It advises asking your insurer what grade of lock it requires, because a wrong lock could be used as a reason not to pay a claim.
Cited in How to Change Upvc Door Lock.
- supplier figure RN-DLIX1K cited
Accsys (Accoya)
The maker's site states that Accoya wood carries a 50-year warranty for above-ground use and a 25-year warranty in ground.
- supplier figure RN-9SUP7L cited
Accsys (Accoya)
Accoya's UK page on its testing and warranty. It settles the 50-year above-ground warranty (25 years in ground or fresh water) and reports independent tests showing coatings on Accoya lasting about three times longer.
Cited in uPVC vs Timber vs Aluminium Windows.
- supplier figure RN-QPEIGS cited
AGC Glass Europe
AGC's UK product page for its Planibel clear float glass. It lists a Ug-value of 5.7 W/m²K for the single clear pane, the baseline for single glazing.
Cited in Glazing Explained: U-values, Low-E, Argon & Spacers.
- supplier figure RN-MXFX2N cited
Arridge Garage Doors
A garage door supplier's product page for Hörmann's single-skin, non-insulated LTE 42 sectional door, stating that the door has been discontinued in the UK.
Cited in Garage Doors: Types & Cost.
- supplier figure RN-WE93FA cited
B&Q
B&Q product page for 44 x 44 mm planed square-edge whitewood in 2.4 m lengths, listing the retail price of £7.75 each including VAT, which sets the timber line in the materials table.
Cited in How to Build Window Seat.
- supplier figure RN-5RXCD9 cited
Brett Martin
Brett Martin's product page for its Mardome Trade dome rooflight. It gives overall U-values of 1.94 to 2.67 W/m2K for double-skin and 1.26 to 1.93 W/m2K for triple-skin polycarbonate.
- supplier figure RN-MGKLU8 cited
Edgetech
A spacer-bar maker's technical article: replacing an aluminium spacer with a warm-edge spacer improves the whole-window U-value by around 0.15 to 0.2 W/m2K. The note's 0.1–0.2 is the more cautious reading of a maker's figure.
- supplier figure RN-ZB71NL cited
Garage Doors Online
An online garage door supplier's product page for the Hörmann ProMatic Series 4 electric garage door operator, showing its supply-only price including and excluding VAT.
Cited in Garage Doors: Types & Cost.
- supplier figure RN-FDS2AP cited
Glazing Vision
A rooflight maker's technical article on low-e glass. It explains that hard coats are tin oxide applied on the float line and soft coats are a sputtered silver layer, applied to one face of the glass.
Cited in Glazing Explained: U-values, Low-E, Argon & Spacers.
- supplier figure RN-YW85GL cited
Hörmann UK
Hörmann UK's sectional door page, giving a whole-door U-value of 1.0 W/m²K for a 5000 × 2125 mm door with its 67 mm thermally broken LPU 67 Thermo sections.
Cited in Garage Doors: Types & Cost, How to Insulate Garage.
- supplier figure RN-7DH8OT cited
IKO
A flat roofing manufacturer's technical note on upstands. It explains that BS 6229 and BS 8217 call for weatherproofing upstands, including at rooflights, of at least 150 mm above the finished roof surface.
- supplier figure RN-KLAX7C cited
JJ Roofing Supplies
the retail price JJ Roofing Supplies publishes for Velux GGL Centre Pivot Pine Roof Window, which is the supply figure the cost book records for this item
- supplier figure RN-4ODGLO cited
Korniche
A roof lantern maker's product page. It describes the insulated core that forms a thermal break in its aluminium sections, separating the cold outer parts from the warm inner ones.
Cited in Roof Lanterns: Cost & Options.
- supplier figure RN-4QQUND cited
Origin
A UK bifold maker's product FAQ. It gives its minimum and maximum leaf widths, maximum panel height and the largest set it makes.
Cited in Bifold Doors: Cost, Sizes & Alternatives.
- supplier figure RN-WLOLLH cited
Pilkington
The glass maker's page for its self-cleaning glass range. It explains that the coating breaks down organic dirt photocatalytically in daylight so that rain washes it off.
Cited in Roof Lanterns: Cost & Options.
- supplier figure RN-8JM8RV cited
Pilkington (NSG Group)
Pilkington's technical handbook for its glass products. Its toughened glass data gives a density of 2,500 kg per cubic metre under EN 572-1, the basis for the 2.5 kg per square metre per millimetre weight rule.
Cited in Replacing Misted Double Glazing: 2026 UK Cost Guide.
- supplier figure RN-51WIYI cited
Pilkington (NSG Group)
Pilkington's product page for its Optilam laminated safety glass explains that when the glass breaks its fragments stay bonded to the PVB interlayer, reducing the chance of glass falling from the opening.
- supplier figure RN-EE56OE cited
Pilkington (NSG Group)
Pilkington Optitherm range of off-line coated low-e glasses for insulating glass units: Ug-values of 1.0 and 1.1 W/m2K in a double glazed IGU, calculated in accordance with EN 673. Optitherm S3 gives Ug 1.1 W/m2K in a standard IGU with very high light transmittance and neutral colour; Optitherm S1A gives Ug 1.0 W/m2K in a standard IGU with improved light transmission and total solar heat transmittance (g-value). These are centre-pane Ug figures, not whole-window Uw.
Cited in Replacing Misted Double Glazing: 2026 UK Cost Guide.
- supplier figure RN-586FDU cited
Pilkington (NSG Group)
Pilkington Optitherm S3, a neutral off-line (magnetron sputtered) coated low-emissivity glass. Ug-value 1.1 W/m2K in a standard 4-16-4 insulating glass unit with 90% argon fill. This is the centre-pane Ug, not the whole-window Uw, and the two are routinely confused. Light transmittance 82%, light reflectance 11%. Available from 3mm to 12mm thickness. Optitherm S3 Pro T is the toughenable version, colour matched after toughening.
Cited in Glazing Explained: U-values, Low-E, Argon & Spacers, Replacing Windows: Process, FENSA & Cost.
- supplier figure RN-I60G6S cited
Pilkington (NSG Group)
The glass maker's thermal insulation FAQ. It says dry air is the standard cavity fill, that argon and krypton are the usual alternatives, and that argon lowers the Ug-value by about 0.2 W/m²K.
Cited in Replacing Misted Double Glazing: 2026 UK Cost Guide.
- supplier figure RN-S1296B cited
Pilkington United Kingdom Limited
Pilkington's product page for K Glass, a hard-coated low-emissivity glass. It describes how a Low-E coating reflects long-wave heat back indoors while admitting solar energy.
Cited in Glazing Explained: U-values, Low-E, Argon & Spacers.
- supplier figure RN-IU7D7U cited
REHAU
REHAU's window profile colour brochure. It shows its colours, including Anthracite Grey (similar to RAL 7016), supplied as PVC foil laminates bonded to the uPVC profile.
Cited in Grey Coloured Upvc Windows Cost: 2026 UK Price Guide.
- supplier figure RN-V2SWRT cited
Samson Doors
A door supplier's product page for the Garador Carlton steel up-and-over garage door, showing the supply-only web price for a 7 ft 0 by 6 ft 6 retractable door including and excluding VAT.
Cited in Garage Doors: Types & Cost.
- supplier figure RN-5NZ1EQ cited
Screwfix
the retail price Screwfix publishes for 1 2 x 15mm white chrome angled l s modern thermostatic radiator valve lockshield, which is the supply figure the cost book records for this item
Cited in How to Restore Radiator.
- supplier figure RN-4CKMW0 cited
Screwfix Direct Ltd
the retail price Screwfix Direct Ltd publishes for smith locke series 3 fire rated overhead door closer silver, which is the supply figure the cost book records for this item
Cited in Fire Doors Explained: FD30 vs FD60 & Where You Need Them.
- supplier figure RN-42XJW4 cited
Secondary Glazing Specialist
Secondary Glazing Specialist 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 Sash Windows: Repair, Replace & Cost.
- supplier figure RN-8NZSKF cited
Shutters Design
Shutters Design 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 Blinds vs Curtains vs Shutters, Plantation Shutters: Cost & Types.
- supplier figure RN-7QN5GL cited
Skylight Factory
the retail price Skylight Factory publishes for 1000 x 1500 mm Korniche Style #2 Aluminium Roof Lantern, which is the supply figure the cost book records for this item. Re-sourced from a category listing so the page a reader opens is the product that was priced
- supplier figure RN-JN88QW cited
Sparklike
A summary of EN 1279-3:2018 by a maker of insulating-glass gas analysers. It states the standard's limits: average gas leakage of no more than 1.0% a year, no unit above 1.20%. Used because the standard itself is paywalled and the BSI page gives no figures.
Cited in Glazing Explained: U-values, Low-E, Argon & Spacers.
- supplier figure RN-YJTWTV cited
Titon
A window vent maker's product page. Its data table gives the same slot vent range in 2,200, 4,000 and 6,000 mm² equivalent area versions depending on length and canopy, tested to BS EN 13141-1.
Cited in Trickle Vents & Background Ventilation.