Hi all, So plan is to creat a new liviing space in the loft. Already have about 3.3m to the apex. We would like more head height at the front and back though (means we can have 2 extra rooms due to improved access). So the plan: 1 Remove existing roof, 2 Raise the walls (2 options here)     Option 1 - raise front and back and reduce the roof angle     Option 2 - raise all walls and chimney and keep current roof angle. 3 Install three dormer windows at the front