Material comparison · 2026
Timber vs uPVC Windows Cost: Sash Comparison
A fair timber-versus-uPVC comparison needs the same window style. This page uses sliding sash windows for both materials so the price difference is not distorted by comparing a premium sash with a basic casement.
Quick price answer: For one medium sash window, our model gives £665–£1,156 in uPVC versus £1,120–£2,036 in engineered timber. Across six windows the ranges are £3,988–£6,937 and £6,723–£12,214 respectively.
Like-for-like sash examples
Both materials use the same medium sash-window assumption.
Figures are modelled UK-average fitted-market estimates from the Window Price Calculator engine, using its 24 September 2026 research refresh. They include ordinary removal, standard fitting, basic making good and VAT; scaffolding, hidden structural repairs and highly bespoke work can sit outside the range.
What the timber premium buys
The price gap is not just cosmetic. The frame material changes manufacturing, finishing and maintenance characteristics.
uPVC sash
Lower initial cost and lower routine finishing requirements. It is the obvious budget route when the aim is a sash appearance without timber joinery.
Engineered timber sash
Higher initial cost, but real timber can be preferred for period character, repairability and certain conservation-sensitive settings.
Why a broad “timber vs uPVC” search can be misleading
Different window styles can overwhelm the material comparison.
- A standard uPVC casement is much cheaper than a uPVC sash, so style must be held constant.
- Premium hardwood heritage sash is more expensive again than the engineered timber examples used here.
- Colour, glazing bars, exact profiles and conservation requirements can materially change timber quotes.
Use your own project
Start a replacement estimate.
Use the calculator to price a complete replacement window or door. Choose the closest product and project size and we’ll carry those choices into the full calculator.
Rough sizes are fine. The full personalised result is unlocked after the £2.99 checkout.Related price guides
Use the closest related guide to compare another specification or project type.
Questions people ask
Are timber windows more expensive than uPVC?
In this like-for-like sash comparison, yes. The medium centre rises from about £910 in uPVC to £1,578 in engineered timber.
How much more are timber sash windows across a house?
For six medium sash windows, the model gives £3,988–£6,937 for uPVC and £6,723–£12,214 for engineered timber.
Is this comparing the same style?
Yes. Both examples are sash windows, which makes the material comparison more meaningful than comparing timber sash against standard uPVC casement.
Compare the same sash project in both materials.
Start with timber sash, then edit the frame material to uPVC without changing the size or quantity.
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