I am in the process of building a mono-pitch roof extension - to get a 17.5 degree pitch and enough space (150mm) below first floor windows and a 2100mm head height of patio doors i am struggling to get a lintel to fit in - how much can i notch a rafter? the opening size is 3.5m so a fairly large lintel will presumably be required?
And help will be very much appreciated...
And help will be very much appreciated...