Should replacement uPVC windows & doors be foamed?

Joined
11 Nov 2020
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United Kingdom
Hi all, about 18 months ago I had about 10 windows and a door replaced by a fensa registered installer.
I had some water ingression on a corner so did some investigation.
I found that:
  1. NO SILICONE HAD BEEN APPLIED TO THE SILL UPSTAND AND ENDS
  2. NONE OF THE WINDOWS HAVE BEEN FOAMED (there is only a bead of silicone on the outside between render and frame)
Looking from the inside I can see a gap of about 10mm between frame & block work.

MY QUESTION IS: Are bulletpoints 1&2 requirements and essential for a Fensa installation?

The installer is coming to site to "address my perceived problems" and I know they will say foaming is not a requirement.

Many thanks in advance
 
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