Dave Plowman (News) wrote:
I'm going to replace an existing window - about 600mm wide - with a 2000mm
wide one, the existing opening being to one side of the new. The wall is
Victorian solid brick. It's on the first floor and there's only about 12
courses of bricks above where the new lintel will go - and the top half or
so of that recent work as a new parapet wall to a roof terrace.
I've read:-

http://www.ultimatehandyman.co.uk/OPENING_A_WALL.htm

If you use Strongboys as reccommended in the above, you only need Acrow
on one side of the wall to be propped, which could be inside the house.
Obviously you need to ensure the Acrow is standing on a firm base to
spread its load; ie on joists not just floorboards.

David