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yes I think he’s used these sizes because there is going to be 150mm of insulation between the rafters.. i think I will Just have to leave a 150mm gap from the top of the window to the bottom of the joist hanger plate. That will allow me to have a decent coving and it won’t look silly. I’m...

Hi all, so I’m going to be having a loft conversion with a dormer at the back. now the New loft floor joists will need installing lower than the Old ceiling joist to make extra height for The loft conversion.. structural engineer has said to use 8 x 2 joists for the new floor and roof in the...