St Mary's, Isles of Scilly
Accoya Windows in St Mary's
Accoya is acetylated timber — dimensionally stable, rot-resistant and warranted for 50 years above ground. The best-performing paint substrate available.
Timber moves. The craft in accoya windows is anticipating exactly how much, in St Mary's conditions, and detailing the joints and finish so that movement never becomes a problem.
What is included
- FSC-certified hardwood with documented chain of custody, available on request for planning submissions.
- Warm-edge spacer bars as standard, which cut the cold bridge at the glass edge and reduce condensation.
- Compression seals rather than brush pile where the design allows, for a measurably tighter close.
- FSC-certified hardwood with documented chain of custody, available on request for planning submissions.
We build accoya windows for St Mary's homes to the size of the hole in the wall, not to the nearest standard unit. That is the whole reason to specify timber in the first place.
Everything is made to order, so the quotation stage matters. We would rather spend an extra hour on the survey than get a section wrong.
Accoya Windows in St Mary's
Free measured survey, fixed written price.
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Open the guide price toolOther products for St Mary's
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Questions
How much disruption should I expect?
Less than most people fear. A straightforward replacement is one opening at a time, typically two to four windows a day. Scaffolding is only needed on higher elevations. We protect floors and furniture and leave the site clean each evening.
How long do hardwood windows actually last?
Properly specified and maintained hardwood joinery has a realistic service life of 60 years or more. The timber is rarely what fails — it is the finish and the seals, and both are renewable. That is the fundamental advantage over uPVC, where a failed unit or a distorted frame means the whole window goes.
Are timber windows warm enough for Building Regulations?
Yes, comfortably. Timber is a natural insulator with far lower conductivity than aluminium or steel. A standard hardwood double-glazed window achieves around 1.2–1.4 W/m²K whole-window, against a 1.4 requirement for replacements. Triple glazing in a deeper section will reach roughly 0.8.
Can I have double glazing in a conservation area?
Usually, yes — using slim-profile sealed units as narrow as 11mm, which fit within traditional glazing bar sections without fattening them. Conservation officers vary, so we specify from the outset to whatever the local authority has stated and provide section drawings for the application.
Get an indicative price in two minutes
Use the guide price tool for a realistic range, then book a free measured survey in St Mary's to firm it up. No obligation either way.