Expert guides on double glazing, triple glazing, window types, costs, and energy ratings for UK homeowners. Find out which windows save the most energy and money.
452 articles
Rehau windows cost £450-£650 for a standard 600x900 mm casement installed in 2026. That is 10-15% more than budget uPVC but less than premium brands like Veka. Compare quotes from…
In Scotland, heritage windows in listed buildings require listed building consent before any replacement. Conservation area rules are less strict but still restrict material changes. Grants cover draught-proofing and secondary…
London conservation area glazing rules require like-for-like timber frames; uPVC is almost never permitted. Non-compliance risks a Section 215 notice and fines. Check your borough's planning portal for specific policies.
Scotland Section 6 windows require a U-value of 1.6 W/m²K or lower from October 2026. Replacing single glazing with compliant double glazing could save £195–£285 per year on energy bills.
48% of UK homes need planning permission for window replacements. You can replace windows without permission only if your home is a house (not a flat), not listed, not in…
Like-for-like window replacements usually don't need planning permission, but any change to size, style, or position does. Exceptions apply for listed buildings and conservation areas. Always check with your local…
Window vent UK options cost £15–£50 for passive trickle vents and £80–£250 for mechanical extractors installed per window. Mechanical vents use 5–15 kWh per year; trickle vents use none. Choose…
Energy efficient windows save a typical semi-detached home £195–£285 per year on energy bills, according to the Energy Saving Trust (2026). Costs range from £400 to £1,200 per window installed,…
The target g-value for UK windows is ≤ 0.4 under Building Regulations Part L. This number measures how much solar heat passes through the glass, balancing winter warmth with summer…
Switchable smart glass costs £500–£1,200 per square metre installed in the UK (2026). A 2.25m² window costs £1,125–£2,700. Annual electricity use is minimal at £1.50–£4.50 for a 2m² PDLC window.…
Self-cleaning glass costs 15-30% more than standard double glazing in 2026, adding £60-£120 per square metre. It uses UV light to break down dirt and rain to wash it away,…
Georgian bars for windows cost £100-£400 per window depending on type. Applied bars are cheapest but least durable; simulated divided lites offer the best energy performance. Compare options from FENSA-registered…
Restoring a leaded glass window costs £250–£600 per panel, while replacing it with a double-glazed unit averages £800–£2,200 per square metre. Restoration is cheaper upfront but does not improve energy…
Obscure glass UK costs £80-£600 per m² in 2026 depending on type. Patterned glass is cheapest at £80-£150, while Pilkington Spacia vacuum glazing reaches £400-£600. All must meet U-value targets…
Solar control glass typically costs £200-£500 per m2 installed and reduces heat gain by 40-60% compared with standard double glazing. It keeps rooms bright while lowering summer temperatures.
Low-E glass adds £40–£80 per m² to window costs but saves £100–£200 a year on heating for a typical UK semi-detached home. The coating pays for itself in 5 to…
Safety glass costs £95–£110 per 1m² pane installed, just £15–£30 more than standard float glass. It is a legal requirement under BS 6262-3 for doors and low-level windows in UK…
Toughened glass costs £80 to £250 per m² installed in 2026, with 6mm panels averaging £120 to £180. The premium over annealed glass buys safety, strength, and compliance with building…
Laminated glass costs £50-£120 per m² installed in the UK (2026). It offers safety, security, and noise reduction over standard glass. Compare prices and benefits now.
Acoustic glass costs £450–£1,200 per window installed in 2026, about £300–£500 more than standard double glazing. It can halve perceived noise. That makes it a worthwhile upgrade for homes near…
Low-E double glazing is the most common glass type for UK windows, costing £350-£450 per standard 600x900mm window. It reduces heat loss by up to 60% versus single glazing, per…
Repair a misted double glazing unit for £40-£80 per pane, but replacement costs £150-£350 and is usually the better choice because it restores full thermal performance with a 10-15 year…
Window seal repair costs £150–£350 per window in 2026. The price depends on window type, size, and access; French doors cost more at £250–£400. Compare quotes from local glaziers.
Yes, plants for condensation can reduce window moisture by absorbing humidity through transpiration, lowering local RH by 5–10%. Place 3–5 large-leaf species like Boston ferns or peace lilies on each…
A full house of uPVC double glazed windows typically costs between 4,000 and 8,000 pounds for a three-bedroom semi-detached house. Individual windows range from 300 to 800 pounds depending on size and opening style. Prices include supply, fitting, and building regulations certification.
Triple glazing costs around 20 to 30 percent more than double glazing but delivers a U-value of around 0.8 compared to 1.2 for standard double glazing. The energy savings are modest for most UK homes, making it most worthwhile for north-facing rooms, noisy locations, or new builds where the price premium is smaller.
Most window replacements fall under permitted development and do not need planning permission. However, if your home is a listed building or in a conservation area, you will likely need consent. The installer must be FENSA registered or you will need separate building control sign-off.
Modern double glazed sealed units typically last 20 to 25 years. uPVC frames can last 25 to 35 years with minimal maintenance. Signs that replacement is needed include misting between panes, draughts around seals, difficulty opening or closing, and visible frame deterioration.
No UK scheme funds replacement windows on their own. The Great British Insulation Scheme closed on 31 March 2026 and only ever covered insulation, never glazing. ECO4 runs to 31 December 2026 in Great Britain only and targets insulation and heating for households on qualifying benefits; glazing is included only where it forms part of a wider whole-house retrofit. Glazing is also standard-rated for VAT at 20%, as HMRC lists double and secondary glazing as excluded from the energy-saving materials zero rate.
Triple glazing achieves U-values of 0.8 W/m²K compared to 1.4 W/m²K for double glazing, saving UK homeowners an additional £30-50 per year in heating costs while providing superior noise reduction…
New windows in the UK cost £300-£1,200 per window depending on material and specification. A full house replacement for a three-bedroom semi ranges from £3,500 to £7,500 for uPVC double…
Secondary glazing is generally worth it for a Victorian terraced house, particularly where conservation area rules prevent sash window replacement. Fitted internally without altering the building's exterior, it can reduce…
Low E glass windows are worth it for UK homeowners because the invisible metallic coating significantly reduces heat loss through the glass, helping homes meet Building Regulations under Part L…
Window security ratings in the UK are primarily defined by PAS 24, a British Standards Institution specification requiring windows to pass independent forced-entry testing, and Secured by Design, a police-backed…
Double glazed windows mist up inside when the hermetic seal around the unit fails, allowing humid air to enter the gap between the panes where it condenses. This is a…
