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https://www.wickes.co.uk/Wickes-Extra-Thick-Draught-Seal-White---3-5m/p/161201 for gaps, or https://www.wickes.co.uk/Wickes-Pile-Tape-Draught-Seal-White---5m/p/161211 for small gaps, plus https://www.wickes.co.uk/Wickes-Seasonal-Secondary-Glazing-Film---6m2/p/210014 for the glazing will do more to keep the heat in than £5k of slatted shutters...
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@velocio this is the correct method of reducing draughts from sash windows.
Shutters will do a little bit but that pile tape actually seals it from coming in.
Once the cold sets in you really feel the difference - we had fairly bad sash windows for three years and it took me two years before I bought that pile tape and I kicked myself for not doing it sooner. Saves a hell of a lot in heating bills too.
Shutters lol great though so if you've got the ££££££ why not
Well they're hardly going to stop air flowing, it's draught reduction I'm going for.
I've got gaps I can presently fit my fingers into around the sash windows. Well-fitted shutters with fairly wide slats are going to reduce the overall space for draughts, and whilst I think some air will bleed through the space around the slats I also think it's going to take the existing draughts and soften them up and spread them out so they're not felt.
Right now one gap in particular lands right on where a chair is :D