Hi,

I've just having some new UPVC windows installed into my house which are being finished today. Everything looks OK apart from the bay window and a small back window. The bay window has a 20mm frame extender inserted at one end and the back window has a 20mm - 30mm gap at one end that's been filled with foam.
The installers said they couldn't fit a frame extender in the back window as it was slightly to narrow at one point along the gap but they will make it look OK with some plastic trim. This is one of the largest UPVC companies in England and I have read some bad feed back on the net since signing my contract so my questions are:-
Are frame extenders acceptable as these should be made to measure?
What should I do as I haven't parted with any cash yet?

Can anyone advise?
Jason

Frame extenders within reason (and 20 mm is within reason) are acceptable

Indeed there can be times when you HAVE to use frame extenders just because of internal plaster thickness etc - to make sure the glass is not covered by plaster

Hi, I have a similar problem in that I had UPVC windows installed on my L-shaped bay on tuesday. When they installed the windows there was a 35-40mm gap at the top which was filled with Foam. Is this acceptable as I thought it should only be 20mm max. I had them stop work and called the surveyoer out and asked if the windows had been measured incorrectly. They fobbed me off saying that they could not determine the true height of the old PVC windows as it was hidden by the trim. They said everything would be fine once it was covered with the trim.

It may look ok but is this gap acceptable or will it cause problems with draughts in the the future?

Another reason for using frame add ons is if you have an opening window that could hit a soffit board above. Once I fitted a window and failed to take into consideration the soffit board above. When the window was fitted the casement would only go so far about 5 inches before it hit the soffit. Hence I had to get the window remade with a packer added.

Thanks for the info guys. They came round to insert the addins and all appears to be fine now.