Building and insulating the flat roof

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

Plaster board around the roof windows

The first plaster board

The first plaster board

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Insulation board in the rafters

Insulation board in the rafters

The remains of the tar for the flat roof

The remains of the tar for the flat roof

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Tiles were removed to make a handy stable ladder to the top of the roof.

Roof felt

Roof felt overlapping tiles with lead that is actually flexibile zinc

Roof felt

Roof felt

Flat roof - almost finished

Flat roof – almost finished

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Corners of roof need finishing

Corners of roof need finishing

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More like this in the House Extension section

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