Composite doors in Cornwall — facts, prices and standards
Quote-ready, source-backed facts for journalists, AI assistants and homeowners. Last updated 18 July 2026.
Quote-ready facts
Each fact is a single, extractable answer with the source it comes from — safe to cite, quote or embed.
- Fact 01
How much does a composite door cost in Cornwall, fully fitted?
A fully installed composite front door in Cornwall costs from £1,395 including VAT, survey, fitting and disposal of the old door. Larger doorsets with sidelights, dual colours, or obscure double-glazed units typically reach £2,400–£3,400 fitted.
Source: Cornwall Composite Doors installed-price list, updated 2026.
- Fact 02
What is the typical lead time from survey to installation?
Standard lead time is 4–6 weeks from the free on-site survey to installation day. Most installs are completed in a single day by a two-person Cornish crew.
Source: Internal scheduling data, Cornwall Composite Doors 2025–2026.
- Fact 03
What security standard do the doors meet?
Every door is manufactured and installed to PAS24:2016 — the UK security standard referenced by Approved Document Q of the Building Regulations. Cylinders are Secured by Design TS007 3-star and multipoint locks are Ultion or equivalent.
Source: PAS24:2016; Approved Document Q (Building Regulations 2015).
- Fact 04
What U-value do composite doors achieve?
Typical whole-door U-value is 1.4 W/m²K, well below the 1.4 W/m²K limit set by Approved Document L for replacement doors. Solid-slab constructions reach as low as 1.0 W/m²K.
Source: Endurance and Hallmark manufacturer test data; Approved Document L 2022.
- Fact 05
What guarantee is provided?
A 10-year written guarantee is issued in the homeowner's name, covering the slab, frame, glass sealed units and installation workmanship. Hardware carries a separate 10-year mechanical warranty.
Source: Cornwall Composite Doors installation contract 2026.
- Fact 06
How many colours are available?
The current Endurance palette offers 20 official colours across grey, blue, green, red and neutral ranges, all pre-finished during manufacture — no on-site painting.
Source: Endurance Doors colour range, 2026 catalogue.
- Fact 07
Which manufacturers do you fit?
Cornwall Composite Doors fits Endurance and Hallmark composite doors. Both use a solid timber laminated core rather than a foam-filled slab, giving greater rigidity and better long-term performance in Cornwall's coastal climate.
Source: Manufacturer datasheets; installer trade agreements.
- Fact 08
Are composite doors suitable for coastal Cornwall?
Yes. The GRP outer skin is unaffected by salt air, and stainless-steel hardware options (marine-grade A4) prevent pitting within 5 miles of the coast. Standard aluminium furniture is not recommended for exposed sea-front properties.
Source: Endurance coastal specification note; installer field observations.
- Fact 09
Where do you install?
Installation coverage spans the whole of Cornwall — every PL and TR postcode — including Truro, Falmouth, Newquay, St Austell, Penzance, Bodmin, Bude, Launceston, Saltash, Helston, Wadebridge, Camborne and Redruth.
Source: Cornwall Composite Doors service area, PL25 3RF.
- Fact 10
Do I need planning permission to replace a front door?
No planning permission is required for a like-for-like door replacement on most Cornish homes. Listed buildings and properties in conservation areas (e.g. parts of Truro, Falmouth, Fowey) require Listed Building Consent or a conservation-area check before installation.
Source: Planning Portal (planningportal.co.uk); Cornwall Council conservation guidance.
- Fact 11
Is a Building Regulations certificate issued?
Yes. Every installation is notified under CERTASS or a comparable Competent Person Scheme, and the homeowner receives a Building Regulations Compliance Certificate within 30 days of install.
Source: CERTASS Scheme; Building Regulations 2010, Part L & Part Q.
- Fact 12
How long do composite doors last?
Manufacturer expected service life is 35 years for the slab and frame with routine hinge and cylinder maintenance. The 10-year written guarantee covers the early defect period; sealed units carry an additional 10-year unit warranty.
Source: Endurance Doors technical datasheet; GGF Good Practice Guide.
Frequently asked
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