I want to install a 3' wide x 6' tall window into an existing brick wall. My concern is about how to shore up the 4" brick facing that continues above the window so that it doesn't collapse into the window opening or crack. When I am done installing the window, I'll also have installed a brick lintel to support the wall above the window. My problem is how to support it temporarily while still having room to put in the window and lintel. The interior framing and header will not be a problem. The brick above the window opening extends upwards as part of a full gable wall. It rises only about 2' above the window on the low side and about 5' above the window on its other side. Since this isn't a lot of brick to support, would the brick be able to support itself (running bond). If not, would supporting one or two bricks above the lintel surface be sufficient? Thanks

Im trying to trim my new windows on the inside (mitered on 4 sides), but there not even with the rock all the way around, it varies from needing 1/2 in. to nothing. I've looked at the diy tips and it says put on jamb extensions and plane down to flush. But how do I plane through the nails fastening the extension. On one side of the window it goes from 1/2 in to flush, that's alot of planing, and won't it look funny to vary that much?