On Mar 12, 1:15*pm, "David WE Roberts"
wrote:
It looks a lot easier than trying to cut a very shallow angle in dense
concrete blocks.- Hide quoted text -
The approach I took to get me to the stage of putting the roof timbers
on my garage are similar. At the top of the walls, screw some
shuttering either side. One side lower than the other to give the
desired shallow angle across the span. Use a pretty strong mix, level
to the shuttering. When its set, lay dpc strip on and put your timber
on that. I've got 150x50 regularised for a span of around 3 metres
side to side and i'm going with 550mm spacing. I'm also going to use
metal straps, from the walls bolted to the roof timbers- I think they
are called hold down ties? Supposed to prevent the entire roof lifting
off in strong winds.

Dave