Carefully pass the frame (with brackets fixed) through the opening.
Fixing the Frame 7/12
Aligning the frame
Place frame on support batten and lay flat on rafters.
Fixing the Frame 8/12
Check frame alignment
Check that the window sits level on the rafters and is positioned
correctly in relation to the rafters. A plastic wedge is supplied
to pack the bracket where there is an uneven rafter.
Fixing the Frame 9/12
Install the brackets
If level, fix the bottom brackets.
Fixing the Frame 10/12
Final alignment check
To make sure the frame is set squarely, measure diagonally
from corner to corner. If A - A equals B - B then the frame
is square, and the top brackets can be fixed.
Fixing the Frame 11/12
Replace sash
Replace the sash to test that it opens and closes properly.
If is not closing properly it is best to find out at this stage
and take any action necessary.