Insulating Concrete Roof in Outbuilding


Postby insulateconcreteroof » Wed Aug 17, 2016 1:34 pm

Hello

I'd appreciate any suggestions - we have an outbuilding with a thick concrete roof; there's no real ventilation, and it gets incredibly hot inside on a sunny day.

Unfortunately I can't insulate it from the outside. Inside, it has very restricted headroom, and there's really only room for an inch or two of insulation.

I realise that in the circus, there's probably not a lot that can be done, but almost any reduction in temperature would be worth having. Knowing nothing about this subject, would foil backed plasterboard be any use, or should I be looking at some kind of foam-based sheeting?

thanks
insulateconcreteroof
Rank: Labourer
Progress to next rank:
50%
Posts: 3
Joined: Wed Aug 17, 2016 1:15 pm

Sponsor

Simply Build It

Postby welsh brickie » Wed Aug 17, 2016 7:07 pm

batten out the ceiling with 50mm x 25mm timber, insulate with 25mm celotex insulation, then use either t&g pine/plasterboard
welsh brickie
Rank: Project Manager
Posts: 2596
Joined: Sat Apr 12, 2008 7:54 am

Postby insulateconcreteroof » Thu Aug 18, 2016 7:38 am

Many thanks, Welsh bricky, looks like that's the way to go.

Whilst I'm here - someone suggested last night that a cheap solution would be to stick polystyrene insulation boards to the ceiling - anyone got any views on whether this option is worth exploring?
insulateconcreteroof
Rank: Labourer
Progress to next rank:
50%
Posts: 3
Joined: Wed Aug 17, 2016 1:15 pm

Postby welsh brickie » Sat Aug 27, 2016 7:06 pm

polystyrene is a fire hazard and gives off toxic fumes if alight, so it needs to be covered, it also creates condensation. Fibreglass is a cheap option
welsh brickie
Rank: Project Manager
Posts: 2596
Joined: Sat Apr 12, 2008 7:54 am

Postby insulateconcreteroof » Sat Aug 27, 2016 7:58 pm

Many thanks, I'll go with the solution you advised.
insulateconcreteroof
Rank: Labourer
Progress to next rank:
50%
Posts: 3
Joined: Wed Aug 17, 2016 1:15 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics