Slim Cavity Units in Cornwall
Narrow-cavity glazing for conservation sightlines. Manufactured to size and delivered across Cornwall.
- Made to size from a measured survey, never cut down from stock
- FSC-certified timber with chain-of-custody paperwork
- Fixed written quotation with the lead time stated
- 10-year workmanship guarantee in writing
Free measured survey · No obligation · Reply within one working day
Slim Cavity Units in Cornwall
Free survey and fixed written price.
Slim Cavity Units across Cornwall
Ask three firms about Slim Cavity Units in Cornwall and you will get three different answers. Most of what we survey locally is granite fishermen's cottages, slate-hung terraces and modern coastal builds, which is not built to any modern module. Then there is the most severe salt and wind exposure in England, which reliably produces accelerated coating failure and salt crystallisation damage at glazing lines given enough seasons. Our focus on this is narrow cavities that perform while keeping the sightline historic.
The survey happens before manufacture, which is why our units fit without packing or trimming. Give us the basics and you will have a written figure, not a range that moves later.
Local factor worth flagging early: Cornish exposure grades mean specification should assume worst-case wind-driven rain.
Towns covered
Keep the joinery you have
Upgrade performance without throwing away sound timber windows.
Cheaper than replacement
Typically a fraction of the cost of new units, with much of the benefit.
Measured before recommended
We find where the heat is actually going before suggesting a spend.
Ventilation kept compliant
Sealing a house up without creating a condensation problem.
What clients tell us
Feedback collected directly from completed projects. Full written references are available on request before you commit.
“The survey showed most of the loss was around the frames, not through the glass at all.”
Verified client, Cornwall“Half the cost of replacement and the rooms hold heat noticeably better.”
Verified client, Cornwall“They fitted trickle vents we had not thought about, which stopped the condensation.”
Verified client, CornwallWhat happens next
Four steps from first call to installed joinery. No pressure at any stage.
Thermal survey
We identify where the losses actually are, which is often not the glass.
Options and costs
Retrofit, secondary or seals only, priced side by side.
Installation
Carried out in situ, room by room, with minimal disruption.
Aftercare
Ventilation checked and maintenance guidance left with you.
Frequently asked questions
Do you cover Cornwall?
Yes. We cover the whole of Cornwall including Truro, Falmouth, Newquay, St Austell and the surrounding villages. Cornish exposure grades mean specification should assume worst-case wind-driven rain. Because the most severe salt and wind exposure in England, we allow for it at survey stage rather than discovering it on the day.
How long does a typical order take?
Most made-to-size orders run six to ten weeks from survey to delivery. Conservation and heavily detailed work can take longer, and we confirm the lead time in writing at quotation rather than leaving it open.
Can you work on a listed building?
Yes, and a significant share of our work is listed or conservation area. We can supply drawings and section details to support a listed building consent or planning application, though the consent itself remains the owner's responsibility.
Do you work in hardwood or softwood?
Both. Engineered hardwood is the default where movement or exposure is a concern, and slow-grown softwood is often the better value choice for painted work in sheltered positions. We will tell you which we would specify and why.
How do you handle glazing?
Standard double glazed units for most work, and slim-cavity units where a conservation officer has restricted sightlines. Single glazing with putty lines is available where the consent requires it.
Talk to us about your project
Free, no obligation, and a fixed figure in writing. We will tell you honestly if what you are asking for is not the right answer.
Request a quote Call 0800 088 6248