How to Choose a Composite Door

A composite door is manufactured from a combination of materials — typically a solid polyurethane foam core, a Glass Reinforced Plastic (GRP) outer skin, and a hardwood or uPVC inner frame. This combination delivers the strength and thermal performance of a solid timber door without the maintenance issues. Unlike uPVC panel doors (which are hollow), composite doors have a solid core that provides genuine substance, better sound insulation and significantly higher security.

The most important security features in a composite door are: a multi-point locking system (minimum 3-point, ideally 5-point), an anti-snap, anti-pick, anti-bump cylinder lock (look for TS007 3-star or Sold Secure Diamond rated), reinforced hinges with dog bolts, and a solid core that resists physical attack. Ask your installer specifically what lock and cylinder specification they use — this is where cheap doors cut corners.

Composite doors are rated for energy efficiency just like windows. Look for a door with a U-value of 1.4 W/m²K or lower — the lower the number, the better the insulation. A good composite door will achieve an energy rating of A or B. The solid foam core is the primary insulator, but the quality of the weatherseals, threshold and glazing (if any) also matter. A well-fitted composite door will eliminate cold draughts at your entrance.

Most manufacturers offer 20-30 standard colours, with popular choices including anthracite grey, black, chartwell green, duck egg blue and rich red. Woodgrain foils like rosewood and golden oak replicate the look of timber. Dual-colour options let you have a different colour inside and outside. Panel styles range from traditional cottage designs to sleek contemporary slabs. Choose based on your property's character — a period home suits a heritage panel, while a modern build looks best with clean, minimal lines.

Before committing, ask: What brand/manufacturer do you use? What lock and cylinder specification is included? What is the door's U-value? Do you offer a survey before ordering? What guarantee covers the door, frame, hardware and installation? Are you FENSA registered or Certass approved? A reputable installer will answer these confidently and provide documentation.

In the UK, a quality composite door with professional installation typically costs between £900 and £2,500 depending on size, style, glazing and hardware. Be cautious of prices significantly below this range — they usually indicate a lower-grade door, inferior hardware or corners cut on installation. A good composite door is a long-term investment that should last 25-30 years or more.