Insulating ceiling of flat roof

[serialDIYer]

Hi,

We live in the top floor of a flat roof flat. In the winter, we have the heating on full blast all the time but heat still escapes (we even changed the radiators for extra heat).

Please can you let me know the best way to insulate the ceiling from inside?

When we redid the bathroom, we took down the ceiling and fitted Kingspan, new plasterboard and skimmed. It has made the world of difference but it's just not feasiable to do the whole flat. Problems is we found asbestos behind the plasterboard ceiling. So we wanted a less disruptive option this time. Also we haven't found a reliable builder that will take on the job for a reasonable price - no one seems to want to rip out the ceiling.

I've found these thermal lining papers, and was going to put them on the ceiling and exterior walls (only one brick thick - no cavity - no surprises, but we also have condensation/mould problems as a result):

http://www.mgcltd.co.uk/sempatap-thermal

http://www.gowallpaper.co.uk/erfurt-mav-wallrock-kv600-thermal-liner-offer-pack2.html

Anyone had any experience with these products? Any other reccomendations or tips would be really appreacited.

I should add, we have borrowed light between the doors and ceiling and so wanted something quite thin so it doesn't cover the little windows (only a 5mm frame between glass and ceiling).

Thanks.

 

[OwainDIYer]

You could also line under the existing ceilings with a plasterboard+insulation composite like Celotex PL4000
http://www.planetinsulation.co.uk/ZPL4025.php

this will drop the headroom slightly but should give better insulation and a better quality finish.

 

[serialDIYer]

Thanks, Owain. I've just measured this, it seems this kind of insulation and plasterboard combo is just a bit too thick and will get in the way of the borrowed light glass above the door.

Do you know of any other materials that are thinner?

 

[ban-all-sheds]

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http://www.thermablok.co.uk/

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[OwainDIYer]

I'm filling in my borrowed lights above the doors for this reason.

Replacing the lounge door with a 15 panel glazed one provides adequate light to internal hall.