Timber glazing upgrades in Merton
Thermal and glazing upgrades to timber windows and doors you already own, so you gain performance without losing the joinery. Covering Merton 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 Merton
Free measured survey in Merton.
Timber glazing upgrades in Merton
Most Secondary Glazing enquiries we take in Merton start with an opening that is not a standard size. You will find mostly Victorian and Edwardian terraces, mansion blocks and post-war infill in this area, and it moves as it ages. The exposure here is high pollution load and sheltered urban humidity, which is exactly the condition that causes paint failure on south-facing sashes and rot at the bottom rail. The value is in internal glazing that leaves the original window entirely untouched, not in the timber bill.
Nothing goes into manufacture until a surveyor has checked each opening on site. Tell us what you are working with and we will put a fixed figure in writing.
A detail specific to this area: large numbers of properties sit in conservation areas with like-for-like replacement conditions.
What we cover locally
- Retrofit Double Glazing in Merton
- Slim Cavity Units in Merton
- Secondary Glazing in Merton
- Misted Unit Replacement in Merton
Survey visits in Merton are usually booked within a week. There is no charge for the survey and no obligation to proceed.
Made to size for Merton
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 LondonMerton questions
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.
What guarantee do you provide?
Ten years on workmanship, covering manufacture and the factory-applied finish. Where we install, the installation is covered too. It is issued in writing with the handover paperwork.
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.
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 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.
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