I
iDIY
Hi guys,
I am installing a flat roof onto a dense concrete block cavity wall. The wall has a window in it.
The roof joists will be at 90 degrees to the wall resting on a timber wall plate on top of the wall. As there will only be a single course above the window will a standard duty catnic lintel be sufficient to support the joists and the flat roof?
I am installing a flat roof onto a dense concrete block cavity wall. The wall has a window in it.
The roof joists will be at 90 degrees to the wall resting on a timber wall plate on top of the wall. As there will only be a single course above the window will a standard duty catnic lintel be sufficient to support the joists and the flat roof?