Hi, I'm basically turning a single storey flat roof, that runs along the
side of my house, into a pitched roof, but also extending to cover an
area once occupied by an oil tank.
Roof will be clay tiles to match existing roofs.
I'm unsure about;
1) Attaching rafters to the side of the house. Is this just screwing a
ridge board (6" x 1") to the side of the house and nailing the rafters to
it, tiling, then covering with lead flashing?
2) Attaching the rafters to the double brick solid wall. Another single
storey part of the house has a 3" x 4" wall plate, offset slightly from
the innner course of bricks, then a row of bricks on the outside which,
because the wall plate is offset, overhang the edge of the wall by
1-2". Should I just copy this?
3) One end of the new pitched roof will butt up to a flat roof (not
replacing it all). I was thinking of exterior grade ply attched to rafter
and vertical down to flat roof, sarking, laths, pvc cladding, with flat
roof covering tucked under the cladding.
4) If I use a purlin do I need ceiling joist (to stop the roof spreading).
Span is 2.2 m and pitch 43 degrees, ish.