EcoRenovator - View Single Post - My eco-extension

mnbv69 · 01-04-13, 05:25 AM

Mikesolar, yes that's the material - aka AAC, an aerated block that comes in a range densities and therefore strengths. A 440x220x100mm block weighs about 7kg.

As to the "R" value , not sure about this in US units but my wall of two blocks separated by a fully filled cavity of 100mm rockwool has an overall "U" of about 0.25 W/mK. About a quarter of this comes from the blocks.

I've mostly used thinjoint mortar (as featured in the video above)- this means the mortar joints are only 3mm thick. I chose this as its quicker than traditional mortar as there's a time saving in mixing a smaller quantity of mortar (and lifting it up!), and it's easy to build more accurately. There's some stainless steel reinforcement strip in there as well but that's another story. We cut a lot of these blocks using a hand saw; very selfbuild friendly!

01-04-13, 05:25 AM	#8
mnbv69 Lurking Renovator Join Date: Oct 2012 Location: UK Posts: 8 Thanks: 1 Thanked 2 Times in 2 Posts	Mikesolar, yes that's the material - aka AAC, an aerated block that comes in a range densities and therefore strengths. A 440x220x100mm block weighs about 7kg. As to the "R" value , not sure about this in US units but my wall of two blocks separated by a fully filled cavity of 100mm rockwool has an overall "U" of about 0.25 W/mK. About a quarter of this comes from the blocks. I've mostly used thinjoint mortar (as featured in the video above)- this means the mortar joints are only 3mm thick. I chose this as its quicker than traditional mortar as there's a time saving in mixing a smaller quantity of mortar (and lifting it up!), and it's easy to build more accurately. There's some stainless steel reinforcement strip in there as well but that's another story. We cut a lot of these blocks using a hand saw; very selfbuild friendly! Last edited by mnbv69; 01-04-13 at 05:29 AM..