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.
675 articles
The most important red flag is a quote that lacks a specific U-value for the whole window, not just the glass A window quote that lists only the centre-pane U-value is hiding the truth. The centre-pane figure (the glass only) is always lower than the whole-window U-value, which includes the frame and the spacer bar. […]
Thermal curtains reduce heat loss through windows by up to 25% A single-glazed window loses around 10 times more heat than a typical insulated wall, and even double glazing loses heat at night. According to the Energy Saving Trust, fitting thermal curtains can cut heat loss through windows by up to 25% (Energy Saving Trust, […]
Smart blinds cut heat loss through windows by up to 41%, according to the Energy Saving Trust’s 2025 updated research on window coverings. According to the Energy Saving Trust, smart blinds can reduce heat loss through single-glazed or unshaded double-glazed windows by 41% when closed at night (Energy Saving Trust, 2025). The UK’s 19 million […]
The UK generated 23% less household waste sent to landfill in 2025 compared to 2010, according to DEFRA’s latest waste statistics When choosing curtains, most homeowners focus on colour and fit, not the environmental impact of the fabric itself. Eco curtains reduce heat loss through windows by up to 25% compared to standard curtains, according […]
The single most important thing to know about window condensation and damp Condensation on windows is the most common source of surface moisture in UK homes. If left untreated, the pooled water can soak into paintwork, window frames and sills, creating the damp conditions that allow mould to thrive and structural rot to set in. […]
Are you considering Anglian Home Improvements for new windows but unsure whether the price is justified? This review examines the company’s costs, product specifications, and customer service record against typical local installers in 2026. Quick Answer Anglian charges £3,200-£4,800 for three uPVC windows, compared to £1,800-£3,000 from local FENSA-registered installers in 2026. The premium is […]
Rehau windows review 2026 Rehau is the most installed uPVC window system in the UK, but the company does not sell windows directly to homeowners. Instead, Rehau supplies plastic profiles to hundreds of independent fabricators who cut, weld, and assemble the finished windows. This means the product you receive depends heavily on the quality of […]
Scottish planning rules treat heritage windows differently from standard replacements In Scotland, “heritage windows” generally refers to windows in listed buildings, conservation areas, or tenements that contribute to historic character. The legal framework that governs these windows is distinct from rules for standard replacements in unclassified homes. Under the Planning (Listed Buildings and Conservation Areas) […]
Conservation-area glazing rules are stricter than standard planning, non-compliance risks enforcement action If you live in a London conservation area, the rules governing window replacement are significantly tighter than standard permitted development rights. Conservation-area status overrides these rights entirely, meaning any change to a window that alters the external appearance normally requires a formal planning […]
Section 6 sets the minimum energy performance standard for replacement windows in Scotland If you are replacing windows in your home in Scotland, you must meet the energy performance rules set out in Section 6 of the Scottish Building Standards. This section applies to all replacement windows in existing homes from 1 October 2026. The […]
The most important thing to know about window security ratings in the UK is that PAS 24 is the baseline test for modern windows, not a premium upgrade. If you are buying new or replacement windows, you might assume that a security rating is an optional extra. That is not the case. Since 2010, Approved […]
What an Article 4 Direction actually does to window replacement rights An Article 4 Direction is a planning order issued by a local planning authority (LPA) that withdraws specific permitted development rights. For windows, it means you cannot replace like-for-like without formal planning permission, even if the new windows match the originals in appearance and […]
You must get listed building consent before replacing any window in a listed building If you own a listed building, replacing windows is not a straightforward home improvement task. Under the Planning (Listed Buildings and Conservation Areas) Act 1990, any works that affect the character of a listed building require formal consent from your local […]
Nearly half of UK homes need planning permission for window replacements, here’s why You might assume replacing your windows is a straightforward home improvement you can do without asking anyone. That assumption is wrong for roughly half of all UK homes. According to DESNZ’s 2025 English Housing Survey, 48% of UK homes are in conservation […]
You can replace most windows like-for-like without planning permission If you are replacing an existing window with one of the same size, shape, and appearance, you can almost always proceed without applying for planning permission. This is because like-for-like replacements are classified as permitted development under the Town and Country Planning (General Permitted Development) Order […]
Over 1.5 million UK homes had window-mounted vents installed in 2025, according to the Department for Energy Security and Net Zero (DESNZ) Ventilation is the second most common home improvement in the UK, after boiler replacement. The DESNZ Public Attitudes Tracker (Wave 83, 2026) shows that rising energy costs and concerns about indoor air quality […]
Double glazing cuts heat loss by up to 70%, here is the typical annual saving If your home still has single-glazed windows, you are losing heat through them at a rate that directly hits your energy bills. The good news is that upgrading to modern energy efficient windows is one of the most effective single […]
When you buy new windows, you will see two key numbers on the energy label: the U-value and the g-value. Most homeowners understand that a low U-value is good because it stops heat escaping. The g-value can be more confusing because a higher number is not always better. Quick Answer The target g-value for UK […]
Switchable smart glass costs roughly £500–£1,200 per square metre installed in 2026 If you are considering switchable smart glass for your home, the first question is usually about price. The installed cost for switchable smart glass in the UK ranges from £500 to £1,200 per square metre, depending on glass type (PDLC, SPD, or electrochromic), […]
Self-cleaning glass works through a chemical reaction triggered by UV light, not rain alone Self-cleaning glass uses a coating that reacts with ultraviolet light to break down dirt. The coating has two properties. First, a photocatalytic reaction uses UV light to decompose organic matter such as bird droppings, leaf stains, and airborne grime. Second, a […]
Georgian bars are decorative glazing bars that sit between or on top of glass panes, not structural dividers Georgian bars, also called glazing bars or astragal bars, are the horizontal and vertical strips that divide a window into smaller panes. They mimic the multi-pane look of 18th-century sash windows. Modern versions are applied to a […]
You own a home with leaded glass windows and one of them is draughty, sagging, or cracked. You want to know whether to restore the original or replace it with a modern double-glazed unit. The answer depends on the condition of the glass, the legal status of your property, and how much you care about […]
The most important thing to know about obscure glass in 2026 Obscure glass is a legal requirement for certain UK windows under Building Regulations Approved Document Part B and Part L. It is not optional for bathrooms, WCs, or any glazing within 800mm of floor level in a room with a bath or shower (GOV.UK, […]
What is solar control glass? Solar control glass is a window coating or tint that reduces heat gain from sunlight while keeping the room bright. It is not the same as standard double glazing or privacy film. Quick Answer Solar control glass typically costs £200-£500 per m2 installed and reduces heat gain by 40-60% compared […]
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.
How Triple and Double Glazing Compare for UK Homes According to the Energy Saving Trust, upgrading from single to double glazing saves UK homeowners between £100 and £120 per year. Triple glazing takes this further with U-values as low as 0.8 W/m²K compared to 1.4 W/m²K for standard double glazing. For the average UK three-bedroom […]
What new windows actually cost in the UK in 2026 Replacing all the windows in a typical three-bed semi costs between £3,500 and £7,500 in 2026 for uPVC double glazing, with individual windows running from about £300 to £1,200 fitted. The range is wide because two quotes for the “same” job can include very different […]
Why Victorian Terraced Houses Have Unique Window Challenges Victorian terraced houses represent one of the most distinctive and cherished housing types in the UK, but they come with an energy efficiency challenge that millions of homeowners grapple with every winter. Built between roughly 1837 and 1901, these properties were designed with ventilation and natural light […]
The average UK conservatory is unused for roughly five to six months of the year. Not because people don’t want to use it, but because it becomes a freezer in winter and an oven in summer. The single biggest reason for both problems is the roof. Upgrading conservatory roof windows for energy saving is one […]
The coating on your windows matters more than the frame, the style, or even the number of panes. That might sound surprising, but for keeping heat inside your home and your energy bills under control, the invisible layer applied to modern glass is doing the heaviest lifting of all. Low E glass has quietly become […]
Burglary remains one of the most disruptive crimes a household can experience, and windows represent the most common point of entry in domestic break-ins across England and Wales. Yet when most homeowners replace their windows, security performance rarely features in the conversation. Price, colour, and energy efficiency tend to dominate, while the question of how […]
