Georgian Sash Window Repair in Borehamwood , Hertfordshire

In most cases, like-for-like repairs and restoration of original timber do not require planning permission. However, if you are planning to change single glazing to double glazing in a Grade II listed building or an area with Article 4 directions—such as parts of Wandsworth or Lambeth—you will likely need consent. Charlie Burgess can advise on the best way to approach your local planning authority with conservation-compliant joinery specifications.

We use a technique called sill splicing. The rotten section of the timber is carefully cut away back to sound wood. We then rebuild the sill using matching seasoned timber, which is bonded and sealed to the original box frame. This is a cost-effective way to fix the most common area of decay while keeping the original Georgian window in place.

Yes. The double-glazed units we use are designed specifically for heritage properties. They use narrow cavities and low-emissivity glass to provide modern insulation without the thick timber beads seen on standard uPVC or modern timber units. When fitted with traditional putty lines and authentic glazing bars, they are often indistinguishable from the original single-pane sashes.

An overhaul goes beyond just fixing a single problem. We strip the sashes out of the box frame, sand back years of built-up paint that causes sticking, replace the cords, service the pulleys, and install a full draught-proofing system. It is a comprehensive service that makes old windows function like new while retaining their historic value.

Most repairs, such as cord replacements or draught-proofing, can be completed within a day. Larger restoration projects involving timber splicing or double-glazing upgrades depend on the number of windows, but we always aim to leave the property secure and weatherproofed at the end of every working day.

Every new bespoke timber sash window we install comes with a 10-year guarantee and FENSA certification. This gives you peace of mind that the joinery and the installation meet current building regulations and are built to last.