Draught seal for timber sash, that lasts more than 3 years

[TodeW]

I'm trying to seal an old timber sash window. Three years ago I fitted Stormguard Self-adhesive V-profile Draught Excluder plastic seal, but checking today I found that it had almost completely disintegrated. This seal fits between the window and the frame. The window is never left open so it hasn't been exposed to much UV light, but it seems that the weather or something else has destroyed it. I still have some unused that I bought at the same time and that still seems OK, but I'm not keen on fitting it as presumably the same thing will happen again.

I'd like to find another seal that fits in the same place. I need it to seal a gap up to about 6mm because it's an old window , and preferably I'd like it to last more than a couple of years!

You used to be able to buy bronze spring strip for this, expensive but lasted a very long time. But now that doesn't seem to be available in the UK except as an extremely expensive import.

 

[opps]

Do you mean side hung sashes or sliding sashes?

If the former, can you not remove the interior moldings and move them accordingly? If you cannot remove them, over the years I have used 2 pack filler and polyethene. The poly goes over the sash and the 2 pack is pushed into the gap. Close the sash and the excess pushes away. Depending on the job, I will use a thin bit of card under the poly to reduce the risk of making the meeting edge too tight. The poly can then be removed.

A few years ago, a customer's front door had bowed so much that there was a gap of 8mm at the top. I could not remove the door stop (it was part of the frame). The 2 pack with a bit of card worked. Time consuming though.

If the latter, you can remove staff and parting beads and replace them with ones that will accept a nylon brush pile- but that is far more time consuming.