Will double glazing old windows strip them of their character and charm – or are there ways to do it sympathetically? I asked the pros how best to tackle it

Exterior of a sash window and front door of a period home, with climbing plants on the wall and a bench in front of the window.

It is often the original features that draw people to older properties, lending them character and charm that can be lacking in modern houses. Windows, in particular, are one of those elements of any home that will make or break its kerb appeal – all too often, original windows get replaced or updated in a totally unsympathetic way.

Many people don't realise that it isn't just the frame style and material that contributes to the look of a window, but the types of glazing used within them too. It is understandable to want to select glazing that will reduce heat loss, but when it comes to older windows, homeowners can find it hard to pinpoint the right solution.