Timber glazing upgrades in Sutton
Thermal and glazing upgrades to timber windows and doors you already own, so you gain performance without losing the joinery. Covering Sutton and the wider Greater London area.
- 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
Quote for Sutton
Free measured survey in Sutton.
Timber glazing upgrades in Sutton
Slim Cavity Units is one of those jobs in Sutton where the survey decides everything. Given the Victorian and Edwardian terraces, mansion blocks and post-war infill that dominates locally, standard sizes are the exception not the rule. The weather does the rest: high pollution load and sheltered urban humidity here, and paint failure on south-facing sashes and rot at the bottom rail as the predictable result. Everything we do here comes back to narrow cavities that perform while keeping the sightline historic.
Manufacture only starts once the survey figures are agreed with you in writing. Ask us for a figure and you will get one, with the lead time stated alongside it.
Local factor worth flagging early: large numbers of properties sit in conservation areas with like-for-like replacement conditions.
What we cover locally
- Retrofit Double Glazing in Sutton
- Slim Cavity Units in Sutton
- Secondary Glazing in Sutton
- Misted Unit Replacement in Sutton
Survey visits in Sutton are usually booked within a week. There is no charge for the survey and no obligation to proceed.
Made to size for Sutton
Every product below is manufactured to your dimensions.
Retrofit Double Glazing
Sealed units fitted into your existing timber sashes.
Learn more →Slim Cavity Units
Narrow-cavity glazing for conservation sightlines.
Learn more →Secondary Glazing
Independent internal glazing for heat and noise.
Learn more →Misted Unit Replacement
Failed sealed units swapped without a new window.
Learn more →Draught Sealing
Perimeter sealing on windows and external doors.
Learn more →Acoustic Glazing
Laminated and asymmetric units for noisy locations.
Learn more →Thermal Survey
Where the heat is actually going before you spend.
Learn more →Trickle Vents and Ventilation
Compliant background ventilation after sealing.
Learn more →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, Greater London“Half the cost of replacement and the rooms hold heat noticeably better.”
Verified client, Greater London“They fitted trickle vents we had not thought about, which stopped the condensation.”
Verified client, Greater LondonSutton questions
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.
Do you deliver nationwide?
Yes, we deliver across England, Wales and Scotland. Delivery is priced into the quotation so there is no separate charge added later.
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 fit, or supply only?
Both. Supply-only is common for trade and contractor clients. For private clients we usually recommend supply and fit, because responsibility for the fit and the finish then sits in one place.
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.
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