Day 24: Flat Roof Felt, Insulation and Plaster Boards Added
Today two builders worked on the flat roof, laying the insulation boards, plywood boards and the tar and felt. The flat part of the roof had a thick layer of solid insulation (Celutex), plus the insulation in the rafters below, so three layers in total : two solid insulation boards sandwiching in a soft Loft Roll one. Also the plasterboard is insulation grade (or something like that).
Very hot work, and few minor burns from the tar too, but overall all done well without any major incidence. This is a task which the builder never really likes as the tar is so hot and tends to spit and flick all over the place. If the tar hits skin it burns straight in.
Inside more insulation was put up and the first of the plaster board added to the roof. It seemed to be a really busy day but not a lot to photograph or talk about really. I did speak with a decorator and have decided not to paint the room myself. The room will be painted the week following screeding and then we can move in!
Update: I had the flat roof re-done in January following a leak!
Plaster board around the roof windows
The first plaster board
Insulation board in the rafters
The remains of the tar for the flat roof
Tiles were removed to make a handy stable ladder to the top of the roof.
Roof felt overlapping tiles with lead that is actually flexibile zinc
Roof felt
Flat roof – almost finished
Corners of roof need finishing
Can I ask why you went with a flat roof rather than a single pitch? Can’t immediately see the value in this more complex and ultimately riskier flat roof approach.
Thanks.
It was how the architect designed it. I think the main reason was to keep it away from the windows above – if it was pitched, or dual pitched, the roof would obscure at least one window, maybe 2.
Ah right, got you.
Excellent website by the way. Am starting my first extension project and have found this to be a superb resource. Gives me a great idea of the various tasks and good pointers where to branch off and do further investigation. Have been down several rabbit holes today involving plastering, different flooring approaches, how to spot cowboy plumbing and electrics etc.