Timber glazing upgrades in Greater London
Thermal and glazing upgrades to timber windows and doors you already own, so you gain performance without losing the joinery. Serving Greater London and the surrounding 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 Greater London
Free survey across the county.
What we see in Greater London
If you are looking at Retrofit Double Glazing in Greater London, the timber is only half the decision. Most of what we survey locally is Victorian and Edwardian terraces, mansion blocks and post-war infill, which is not built to any modern module. Add high pollution load and sheltered urban humidity to that and paint failure on south-facing sashes and rot at the bottom rail becomes the usual trigger for replacement. What you are paying for is reworking the rebate so a sealed unit fits without bulking the section.
A surveyor visits first and records the real dimensions, at several points on each opening. Send what you have, even if it is only a phone photo, and we will take it from there.
Local factor worth flagging early: large numbers of properties sit in conservation areas with like-for-like replacement conditions.
Products available in Greater London
All made to size and delivered across the county.
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 LondonGreater London questions
Do you cover Greater London?
Yes. We cover the whole of Greater London including Croydon, Bromley, Ealing, Enfield and the surrounding villages. Large numbers of properties sit in conservation areas with like-for-like replacement conditions. Because high pollution load and sheltered urban humidity, we allow for it at survey stage rather than discovering it on the day.
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.
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.
What if the opening is out of square?
Most older openings are. The survey records the actual dimensions at several points and the unit is manufactured to suit, which is the main reason we survey rather than work from the sizes given over the phone.
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