Windows
Timber Flush Casement Windows
The flush casement is the classic English window — the sash closes flat into the frame, giving a clean shadow line and a very period-correct face.
A well-made timber flush casement windows in the UK should open with one hand, seal without slamming and need nothing more than a wash and an occasional inspection. That is the standard we work to.
What you get with our timber flush casement windows
- Micro-porous finishes that let the timber breathe rather than trapping moisture behind a hard film.
- Kiln-dried to 12% moisture content before machining, so the sections stay true once they are installed.
- Warm-edge spacer bars as standard, which cut the cold bridge at the glass edge and reduce condensation.
- Weathered cills with a proper drip groove, so water leaves the timber instead of tracking back under it.
- Micro-porous finishes that let the timber breathe rather than trapping moisture behind a hard film.
How we price timber flush casement windows
The guide range above assumes a typical domestic unit in Idigbo with argon-filled double glazing and a factory-painted finish. The variables that move the number most are, in order: overall size, timber species, glazing specification and finish. Access and making good come next.
| Variable | Effect on price |
|---|---|
| Timber species | Idigbo baseline · Sapele +7% · Accoya +24% · European oak +38% |
| Glazing | Double baseline · heritage slim +13% · triple +19% |
| Finish | Primed only −8% · factory painted baseline · stained or oiled +4% |
| Quantity | 2–4 units −3% · 5–9 units −6% · 10+ units −10% |
Ask for the guide price first. If the range works for your budget, we will book a survey in your area and firm it up properly.
Frequently asked
Free survey
Flush Casements — measured, priced and drawn before anything is made.
Not sure on budget?
The guide price tool gives you a realistic range for timber flush casement windows in under two minutes.
Get an indicative priceWhat is Accoya and is it worth the premium?
Accoya is timber that has been acetylated — chemically modified so it no longer absorbs water. It barely moves, does not rot, and carries a 50-year above-ground warranty. It is the single best paint substrate available. For exposed elevations and coastal sites the premium usually pays for itself.
How do the surveys and quotations work?
The guide price tool gives you an indicative range in a couple of minutes. If that range works, we book a free survey — measurements, profiles, exposure, access — and issue a fixed written quotation with a drawing. Nothing is manufactured until you have approved that drawing.
What sort of guarantee do you offer?
Ten years on the joinery and the manufacture, and the sealed units carry their own manufacturer's warranty. Accoya frames carry the 50-year above-ground timber warranty from the material supplier. All of it is confirmed in writing with the quotation.
Will the timber warp or stick?
Not if it is specified correctly. Sticking comes from moisture ingress into unsealed end grain, or from solid stock used where laminated sections were needed. Kiln-dried timber, sealed end grain, factory finishing and engineered sections on longer spans between them eliminate it.
Can you fit trickle vents?
Where Building Regulations require background ventilation, we design it into the head of the frame at manufacture. That looks far better and performs far better than a vent drilled through a finished frame on site.
Do you work on listed buildings?
Regularly. Listed building consent turns on detail — sightlines, glazing bar sections, opening method and glass type. We survey the existing joinery, record the profiles and produce drawings you can submit. We will not quote a detail we know will not pass.
The process
How a timber flush casement windows order runs
Get an indicative price
Use the guide price tool or send a photo and rough sizes. You get a realistic range in minutes.
Free measured survey
We measure the openings, record existing profiles and check exposure, access and cill condition.
Fixed quote and drawing
A written price and a section drawing. Nothing is manufactured until you approve it.
Manufacture and install
Made, finished and cured in the workshop, then fitted by our own team with making good included.
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Timber Flush Casement Windows by county
Local guide prices, lead times and installation coverage.
Get an indicative price in two minutes
Use the guide price tool for a realistic range, then book a free measured survey to firm it up. No obligation either way.