cavity block insert

Jackeen63

Hi all,

I'm getting an extension to a 3 bed semi built 1950's (cavity block). There seems to be no way to effectively pump the existing cavity blocks with bead type insulation.

The architect is advising going with cavity again and drylining the internal walls.

My question is: Does anybody know of something like a polystyrene block that could be inserted into the cavity blocks at build time. I know it wouldnt solve the cold bridging problems, but it should be an inexpensive way to improve the overall u-value.

thanks in advance

Mellor

Is the architect suggesting a "cavity block" wall, or a block "cavity wall".
As they are two very different things.

As for the polystyrene insert. It would end up being quite expensive, and would do very little for the wall. As the heat would take the path of least resistance so to speak, the cold bridges are the problems

Viking House

Why not use a warmer block like Poroton or Ytong? And put the insulation on the outside for a much greater effect.

kadman

Hi,

This might offer a solution for you if you are considering an ICF option,

http://www.mdue.it/certificazioni/omologazione_irlanda.pdf


kadman