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Cold Roof Insulation for Flat Foor Extension to Bungalow

Posted: Tue Jan 26, 2016 8:20 pm
by YNWAJK
Hi everyone,

I am currently having a single storey flat roof extension on the rear of my bungalow.

I am at the roof insulation stage and would appreciate some advice.

Its a cold roof I have 175mm joists, I am planning on leaving a 50mm void to the deck can I use jablite sheets and what thickness do I need.also I am unsure how to fit these boards around the herrinbone struts. Just a thought could I use rockwool?

Any advice appreciated.

I am not a builder, I have had the block ad beam floor, cavity walls and roof installed by profesionals, and signed of by bco. Now its down to me to finish on a budget.