Window help

[Block99]

Hi I'm looking for some help from any window fitters out there. We have recently had all our windows replaced. In our hallway we wanted a fixed pane window. We asked for it single pane and were clear that we wanted it as bog as possible to let as much light in as possible.

The company have now fitted it and there is a strip across the top of the window which I'm sure has been put in as they have miss measured them. The owner of the company has said that it is an "add on" as without it the trickle vents would be too close to the plaster and they couldn't not have a trickle vent as it is a non opening window.

I have attached a photo of the window with the strip above (everything is white so it's not a great photo). I have also attached two photos of other windows he has done where the trickle vent is right next to the plaster. Do people think he has mis measured or is he telling the truth.

PXL_20260207_143652057.jpg

• Block99
• 7 Feb 2026

PXL_20260207_143205516.jpg

• Block99
• 7 Feb 2026

PXL_20260207_143214680.jpg

• Block99
• 7 Feb 2026

 

[ronniecabers]

He is sort of right , yes without alteration the trickle vent would hit the reveal... rather than a knock on our supplier would use a ' wide outer frame' on the head of the frame to accommodate the vent, but sometimes this still won't be enough to clear the internal reveal.
So the answer would be , he's done nothing wrong

 

[Block99]

Hi,

Thanks for your reply. What about the last photo then? Is that a problem? The trickle vent is touching the reveal here.

 

[ronniecabers]

Ideally it should have had a knock on ( or wide outer frame ) as well , to keep it a little lower. Some would deem it ok if it was still openable