Fair enough, There are many different ways to achieve a u-value, but to make it simple and avoid having to dot and dab with insulated plasterboard will list the blocks that will suit your purpose for 0.25.
Firstly we hate aircrete blocks for a number of reasons, but then again we are old school.
With regard to rear extension, would suggest that you do not do outer skin in blocks but in flettons, rake out bed joints ready for render. This will give you a much better job.
We list blocks suitable for your purpose. We have only listed the 3.5 newtons and excluded the odd 2.8Ns that are kicking about, although we have thrown in a couple of 4s.
Celcon 3.5N K value 0.11
Celcon standard 4N K 0.15
Durox 3.5N K 0.11
Thermolite Shield 4N K 0.15
Topblock standard 3.5N K 0.15
All the above should be stock items in any decent builders merchants.
oldun
Firstly we hate aircrete blocks for a number of reasons, but then again we are old school.
With regard to rear extension, would suggest that you do not do outer skin in blocks but in flettons, rake out bed joints ready for render. This will give you a much better job.
We list blocks suitable for your purpose. We have only listed the 3.5 newtons and excluded the odd 2.8Ns that are kicking about, although we have thrown in a couple of 4s.
Celcon 3.5N K value 0.11
Celcon standard 4N K 0.15
Durox 3.5N K 0.11
Thermolite Shield 4N K 0.15
Topblock standard 3.5N K 0.15
All the above should be stock items in any decent builders merchants.
oldun
