Home DIY

The old boxes were 5" deep because the original single glazed sashes were that way. The replacement double glazed PVC was also 5" deep because they didn't have any sashes, only tilt windows.

The new ones are a full 6" deep and they can't sit any further out of the house so they're in the same exterior position which means they protrude into the room by 1".

1. The options are build up the walls by 1" and run them perfectly flat. Costs a lot. Looks perfect.
   
2. Build up the walls by a little bit and run them with a small filler behind the architrave. Costs quite a lot. Looks ok.
   
3. Put a 1" filler behind the architrave. Costs nothing. Looks shit.