Sash Window Double Glazing Upgrade in City Of London , City of London

In many cases, yes. If your original box frames are in good structural condition, we can manufacture new timber sashes fitted with double glazing that sit directly into the existing frames. This avoids the need for major structural work and preserves your interior architraves and plasterwork. During the survey, Charlie will check for any rot in the sills or pulley stiles that may need splicing before the new sashes are fitted.

Like-for-like timber repairs often do not require formal planning permission, but installing double glazing in a conservation area or a listed building can be more complex. Many councils in Wandsworth, Lambeth, and Richmond now look favourably on timber units that match the original profiles. We can advise you on the specific requirements for your local authority to ensure your upgrade is compliant.

Draught proofing is one of the most cost-effective ways to improve a period home. By installing hidden brush seals, we close the gaps that allow heat to escape and cold air to whistle through. When combined with our double glazing, it can significantly lower your heating bills and almost entirely eliminate the rattles common with older Victorian windows.

Standard double-glazed units are typically 20mm to 24mm thick, which requires very chunky timber frames that look out of place on a period property. Our double-glazed units use advanced thermal technology to provide similar insulation levels in a much thinner profile. This allows us to maintain the authentic "sightlines" of your windows, ensuring they look like the original single-glazed sashes while providing modern A-rated thermal performance.

The timeline depends on the number of windows, but a standard room can often be completed in a day or two. We work cleanly and efficiently, ensuring your home is secure at the end of every working day. Because we are based in Battersea, we are local to South West London and Surrey, which allows us to manage logistics and site visits effectively without long delays.