Piece of plastic inside UPVC window frame? What is it?

Joined
19 Dec 2017
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Hi all

One of my UPVC windows was not shutting properly and I found this piece of plastic inside the frame which the window was being caught on. I removed it and the window now shuts properly. What is it, is it necessary? I've not noticed this on previous house windows before

They are approx 1 year old (new build house).

I tried to google it but it didnt come up with anything

Thanks in advance

Pictures attached:

PXL_20230918_074210959.jpgPXL_20230918_074230992.jpg
 
Thats an Ant bridge. They are installed to allow armies of Ants access into and out of your property.
 
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