How to draughtproof sash windows

Sash windows are a characterful architectural feature prevalent on many period buildings. Though they are beautiful, they are far less efficient than modern double and triple glazing when it comes to excluding cold droughts, especially if they are in need of repair.

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Common reasons sash windows let draughts in

Sash windows are made from wood which, unless properly fitted and regularly treated, swells and shrinks with temperature fluctuations, causing windows to either stick or rattle. Wood can also be attacked by pests, causing it to rot, while cracked putty and unbalanced weights can place additional strain on the window, causing it to sag.

What sash window repair options exist?

It is strongly recommended that you seek the advice of a professional, such as https://www.sashwindowpreservation.co.uk/services/sash-window-repair/, before embarking upon a DIY repair job as you risk damaging the window or reducing its functionality if your repair fails.

If the issue is that the timber has shrunk due to temperature fluctuations, you may be able to seal the gap using weatherstrips or silicone sealant, though it is important to remember that insufficient ventilation can contribute to an increased incidence of damp within the home, so always make sure that you bear this in mind when trying to address draughts.

What alternative solutions are there?

The cheapest solution to draughty sash windows is installing thick, thermally lined curtains. Wool, tweed and velvet curtains are ideally suited to this job and will provide a pleasing period feature while increasing the heat retention in your home without needing to touch the windows at all.