Cavity Wall Question

[concretedan]

Hi all,

I am going to start putting up the walls for my extension very soon. I am planning on using 100mm dense concrete blocks for the outside which will be rendered, 100mm cavity full filled with 100mm dritherm 37 and then 100mm Celcon Solars internally finished with dot and dab plasterboard. I can't find any info regarding how to work out the U value for this make up of wall. Anyone have any ideas?

Cheers,

Dan

 

[freddiemercurystwin]

Phone up the insulation techy department, they'll do a U Value calc and send you an email you can shove under the Building Inspectors nose, should he ask for it.

 

[noseall]

Try Here.

 

[geraint]

and i wonder if it is part of the local council