Guides to energy-efficient doors for UK homes. Composite, timber, and uPVC door costs, security ratings, and thermal performance compared.
147 articles
Composite doors are generally more secure than timber doors in the UK, with most models achieving a Secured by Design rating and including a 5-lever mortice lock as standard. A…
The typical lead time for a new front door in the UK is 4 to 12 weeks from order to installation. Standard composite doors take 4 to 6 weeks, while…
Modern bifold doors can be energy efficient for a UK kitchen extension, with typical U-values of 1.2 to 1.6 W/m²K for double glazing. High-performance triple-glazed bifold doors achieve U-values as…
The most secure front door for a UK home in 2026 is a composite door with a three-star British Standard (BS 3621) cylinder lock and a multi-point locking system, achieving…
For UK homes in 2026, a composite door is generally the better choice for security, thermal efficiency and longevity, but costs around 40% more upfront. A composite door costs £700…
Around 90% of UK composite doors have a white interior finish. Find out why, how it affects thermal performance, and what coloured finishes cost (£50–£150 extra).
Solidor leads on energy efficiency with a U-value of 1.2 W/m²K, but Rockdoor and others compete closely. Find the best composite door for your home.
Buy composite doors through a TrustMark or FENSA registered installer for £1,200–£2,000 fully fitted. Local firms cost 20–30% less than national brands.
Composite doors sold in the UK are made in China, Poland, and the UK. British-made doors cost 15–20% more. Learn where your door comes from.
GRP composite doors are made from a glass-reinforced plastic skin bonded to a timber or foam core.
Composite doors cut heat loss by up to 50% versus timber, with U-values of 1.2 W/m²K or lower. Find out what makes them worth the upgrade.
Composite doors mimic painted timber with woodgrain finishes, 20+ colours and U-values around 1.4 W/m²K under UK Building Regulations 2021. See every style option.
Composite doors built to BS EN 1279 must resist UV fading for 10 years, but cheap imports can fade within 3–5 years. Find out what to look for before buying.
Painting a composite door voids the manufacturer's warranty instantly. Learn why the factory GRP finish lasts 10+ years and what approved coatings you can use.
Restore a composite door without sanding using a colour-matched repair kit and UV polish. Proper care can extend its lifespan beyond 30 years.
Clean composite doors with warm water and mild detergent every 2–3 months. Avoid bleach and pressure washers or you risk voiding your manufacturer guarantee.
Composite doors supplied and fitted cost £950–£2,800 in the UK, averaging £1,500. See how size, design, and location affect your final price.
Composite doors can resist fading for 10+ years if BBA certified. Find out which finishes last longest and how to stop your door losing colour.
No, composite doors do not need painting. The factory-finished GRP skin resists fading for 25–30 years.
Composite doors expand less than 2mm in heat and won't warp or stick. Learn why GRP construction and a 3–5mm install gap keep your door working year-round.
Composite doors expand and contract by just 3–5mm, far less than uPVC's 6–8mm. Find out why this happens and how correct installation prevents sticking or gaps.
Composite doors expand by no more than 2mm in extreme heat, far less than timber. Here is what UK homeowners need to know about thermal movement.
Composite doors can bow, but it is rare if correctly installed. Learn the causes, from heat to poor fitting, and how to prevent warping for good.
You cannot plane a composite door, it voids the warranty and destroys the GRP skin. Safe trimming is limited to 2–5mm using a saw.
A composite front door costs 800 to 2,000 pounds fitted. Timber doors range from 1,000 to 3,000 pounds. uPVC doors are the most affordable at 500 to 1,200 pounds. Prices include frame, hardware, and professional installation.
Composite doors offer the best combination of insulation, security, and durability. They typically achieve U-values of 1.0 to 1.4 W/m2K, similar to double glazed windows. Look for doors with a solid polyurethane foam core for maximum thermal performance.
The most energy efficient front doors are composite doors achieving U-values of 0.8-1.2 W/m²K, costing £800-£2,000 installed. They outperform uPVC, timber, and aluminium on thermal performance while providing excellent security.
Bifold doors cost between £2,500 and £15,000 or more supplied and fitted in the UK, depending on material and panel count. Budget for 40 to 60 percent on top of…
A new front door costs between £800 and £2,500 installed in the UK. It saves roughly £20–£45 per year on energy bills, so the strongest reasons to replace are security,…
Patio doors in the UK cost between £1,500 and £6,000 installed, depending on type and material. Install them after structural and plastering work is complete, ideally in late spring or…
Composite doors cost £1,200–£2,200 and uPVC doors £500–£1,200 installed in 2026. Composite offers better insulation (U-value 1.2 vs 1.6 W/m²K), saving £50–£90 yearly on heating, with a payback period of…
Door draught seals cost £15-£30 per door for DIY materials and save £25-£40 per year on heating bills, according to the Energy Saving Trust. They are one of the cheapest…
