Window Estimator for UK Installers & Fabricators

Estimate window jobs for the UK market. GBP pricing, mm precision, FENSA & CERTASS-aligned specs, and full profile libraries from Rehau to Deceuninck.

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🇬🇧United Kingdom£GBP pricingmm precision

Estimate a UK Window Job

Full estimator adds profile system, glass spec (28mm A-rated, 36mm triple), foil colour, hardware brand, labour per window, and your markup. FENSA certificate fee included as optional line item.

Built for the UK Fenestration Industry

Estimation tuned to British market rates, regulations, and installer workflow.

1

Part L & WER-Ready Specs

Every window carries Part L (2022 amendment) and Window Energy Rating checks. Hit the A+, A, or B rating your spec demands, and the app flags any combination that fails building regulations.

2

UK Supplier Price Lists

Import trade prices from Rehau, Veka, Deceuninck, Liniar, Eurocell, Profile 22, and Kömmerling. GlassAssure and Seamless glass supplier lists are also pre-mapped. Costs update when your distributor raises prices.

3

FENSA & CERTASS Integration

Generate the product data sheet that your FENSA or CERTASS inspector requires — U-values, WER ratings, and installation method statement — in the right format. No more chasing paperwork the week after the job completes.

4

Labour Day-Rate & Per-Unit Modes

British installers run two economic models: daily gang rate (~£350/day for a 2-man team) or per-window fit rates (£45–£80). Doorwin handles both, and mixes them for jobs that need 1st-floor scaffolding. Net-net: your estimate reflects how you actually work.

UK Fenestration Market Context

The UK window market is worth about £2.6 billion annually, split roughly 70% replacement and 30% new-build. UPVC dominates residential (~85% market share), with aluminium gaining in both new-build premium and extensions/orangeries. Energy efficiency standards (Part L uplift, 2022) have pushed A-rated glazing from optional to standard.

For UK installers and fabricators, the challenge isn't design — it's accurate estimation against razor-thin margins. Missing a £40 trim or under-pricing a 2m wide sliding sash by 20% wipes out a job's profit. Doorwin's estimator is built to catch those costs before the quote goes out, using real UK supplier pricing and your actual labour rates.

Frequently Asked Questions (UK)

Does it handle FENSA certification properly?
Yes. Every installed window generates a FENSA-compliant product data sheet with U-value, WER, gas fill, and installation specification. Your notifier can process certificates without manual re-entry of product details.
Can I import my Rehau or Veka price list?
Yes. Upload the CSV price list from your Rehau, Veka, Deceuninck, Liniar, or Eurocell distributor — Doorwin maps product codes to the profile system library and applies your negotiated discount on every future quote. Updates take about 2 minutes.
Does it work for sash window replacements?
Yes. Timber-look UPVC sash windows (Bygone, Residence Collection, Rehau Rio Heritage) are fully supported with sash-horn options, mechanical joint vs mitred joint pricing, and spiral balance vs traditional cord/weight choices for conservation area work.
Is it useful for commercial shopfront work?
Yes, for light commercial. Aluminium shopfronts, commercial doorsets, and commercial casements up to 3m × 2.5m are supported. For fully bespoke curtain walling over 4m, you'll still want a structural engineer's input — Doorwin produces the takeoff, not the structural calc.

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Stop Losing Margin on Under-Priced UK Quotes

Free to download. FENSA-compliant. Built for British installers. Start today.

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