Window installation - no gap?

Eldrax

Hi, had new windows installed, and the house is pretty cold and draughty. Worse than with old windows.  Replacing old plaster around windows anyway so thought I'd remove from one of the colder windows to see what's going on. Three concerns I have
1) on bottom right the sill touches the wall, then hardly any gap until right near the top of frame, then about 2mm. 
2) the frame sits further out than old one, not alot, but there was just a little of the external brick I side before, now it's about 7mm more
Would either/both of these contribute to (more) cold bridging?

3) no insulation down side - just sealant on outside. Not that you'd fit in much insulation in such a small gap. So it's just a thin bead of sealant between inside and outside? How can this be A-rated energy efficiency? I can feel cold air around the frame.

Are any/all of these acceptable practice, or cause for a complaint?

Thanks in advance

TELLIT01

The window construction is A rated, not the installation.  I would be inclined to use expanding foam to fill any gaps between frame and wall before plastering.  Once the plaster is redone it should solve a lot of the draught problems.

grumbler

IMO, there has to be a gap AT LEAST 5mm around the window and it must be filled with foam, not juist sealed with silicone.
Smaller gap is difficult to fill = wrong size, poor job. 

Eldrax

Hi, thanks for responses.

Unsurprisingly, I agree with Grumbler - I can't put any foam to insulate because the gap is too small. Yet it's enough to let cold air in - and behind the window board where is hard to reach.   Also it should surely need to allow for expansion and contraction.

As for the 'the window is a-rated but not the installation', that might apply if I'd only paid for the windows, but I also paid for installation, and a window's efficiency is only as good as it's installation.

Anyway, this has helped me reach my own conclusion that it is grounds for a complaint. 

Thanks both 😉