Slim Cavity Glazing in Greater London
Double glazing within a historic sightline. Manufactured to size and delivered across Greater London.
- 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 Glazing in Greater London
Free survey and fixed written price.
Slim Cavity Glazing across Greater London
Most Slim Cavity Glazing enquiries we take in Greater London start with an opening that is not a standard size. You are mostly dealing with Victorian and Edwardian terraces, mansion blocks and post-war infill around here, so openings vary more than people expect. Locally you are contending with high pollution load and sheltered urban humidity, so paint failure on south-facing sashes and rot at the bottom rail is the fault we are called out to. Where we put the effort is getting a sealed unit into a historic sightline without bulking it out.
A surveyor visits first and records the real dimensions, at several points on each opening. A quick call or a photograph of the opening is usually enough to get you a price.
A local consideration we always raise: large numbers of properties sit in conservation areas with like-for-like replacement conditions.
Towns covered
Replication, not approximation
Profiles copied from the surviving original, section by section.
Drawings for consent
Measured section drawings supplied to accompany a listed building application.
Conservation glazing
Slim-cavity units and genuine putty lines where the consent requires them.
Fabric retained where possible
We splice and repair before we replace, because the original is the point.
What clients tell us
Feedback collected directly from completed projects. Full written references are available on request before you commit.
“The conservation officer approved the sections first time, which had not happened with the previous applicant.”
Verified client, Greater London“They spliced the original cill rather than replacing it, which was exactly what we wanted.”
Verified client, Greater London“The putty lines look right, and from the street you cannot tell which windows are new.”
Verified client, Greater LondonWhat happens next
Four steps from first call to installed joinery. No pressure at any stage.
Record the original
We measure and draw the surviving joinery before anything is removed.
Drawings and consent
Section drawings prepared to support your application.
Replication
Made to the recorded profile in matching species.
Careful installation
Fitted with minimal disturbance to surrounding historic fabric.
Frequently asked 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 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