I'm planning to change my lean to Polycarbonate roof too a flat roof construction. I will be changing all existing roof joists, but I am unsure how to attach to the main building tiled roof. Pics would help.
You will have to fit bigger timbers for a flat roof, have you bolted those to your neighbours wall.
You dont have a lot of headroom, you might have to remove a few rows of tiles, run new timbers onto the wall plate, to a beam on the front, sat on some piers.
Fit the roof then tile back down to it.
It will make that room a lot darker.
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