Sash Window Restoration in Hampstead & North London

In most cases, yes. Restored sash windows with draught-proofing and secondary glazing can match the thermal performance of modern double-glazed units at a fraction of the cost. In Hampstead conservation areas, uPVC replacements are often prohibited by planning regulations, making professional restoration the only permitted route to improved energy efficiency.

A professionally restored sash window with microporous paint finishes and quality draught-proofing should give fifteen to twenty years of reliable service before it needs restoring again. The paint film is the shorter-lived part: expect to refresh it every three to five years on exposed elevations. The microporous system allows moisture to escape from the timber rather than trapping it beneath the surface, which is what breaks the rot and paint-failure cycle.

Yes. We use resin-based timber splice repairs to replace only the decayed sections while preserving the sound original timber. This approach is more cost-effective than full replacement, maintains the authentic proportions and moulding profiles of your windows, and satisfies conservation officer requirements for listed buildings.

Draught-proofing is a standard component of every sash window restoration we carry out. We fit Devonshire-type brush seals into routed channels within the frame rebates. These seals are invisible when the window is closed, do not affect the operation of the sash, and dramatically reduce cold air infiltration and rattling.

We work across Hampstead Village, Belsize Park, Swiss Cottage, Primrose Hill, West Hampstead, St John's Wood from our Finchley Road base. If your street is not listed, call us — we cover most of NW and N London and will tell you honestly if a job is outside our patch.

Original timber sashes in Georgian and Victorian houses, including listed buildings and conservation-area properties where a uPVC replacement would not be permitted. If your windows still run on cords and weights they can almost always be restored; sealed modern replacement units are the one case where there is nothing for us to restore.