Slim Cavity Units in Devon
Narrow-cavity glazing for conservation sightlines. Manufactured to size and delivered across Devon.
- 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 Devon
Free survey and fixed written price.
Slim Cavity Units across Devon
The Slim Cavity Units we make for Devon is set out from a survey, not a size chart. You will find mostly cob and thatch, Regency seaside terraces and Dartmoor granite cottages in this area, and it moves as it ages. With the wettest large county in England with severe Atlantic exposure in the mix, sustained rot in cob-embedded frames and moor-exposed openings is a question of when rather than whether. What we concentrate on 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. Photographs and approximate sizes are all we need to start.
Something particular to this area: cob walls move seasonally, so frames need tolerance built into the fixing detail.
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, Devon“Half the cost of replacement and the rooms hold heat noticeably better.”
Verified client, Devon“They fitted trickle vents we had not thought about, which stopped the condensation.”
Verified client, DevonWhat 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 Devon?
Yes. We cover the whole of Devon including Exeter, Plymouth, Torquay, Paignton and the surrounding villages. Cob walls move seasonally, so frames need tolerance built into the fixing detail. Because the wettest large county in England with severe Atlantic exposure, we allow for it at survey stage rather than discovering it on the day.
Can you price from drawings?
Yes. Send a drawing set or a schedule and we will price against it. If anything is ambiguous we will query it before quoting rather than assume and reprice later.
Do you take a deposit?
Not before the measured survey. A deposit is only requested once the survey is complete and you have approved the final schedule and price.
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.
Will the finish need maintaining?
A factory-applied microporous finish typically needs inspection every three to five years, sooner on exposed coastal elevations. Maintaining it is far cheaper than letting a coating fail and the timber take up water.
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