2 block walls with insulation - use different blocks or same ?

[pgtips]

Hi,

building a garage with low wood roof, bitumen tiles so very little weight.

Previous posts have shared info that to ensure best protection against condensation inside a cavity wall is the way to go.

Blockwork seems the quickest way to erect the wall. It doesn't need to look nice, it will be panelled/clad with wood afterwards to look nice

Is a perfectly feasible path to this to build the walls using different blocks, thinking one has thermal properties, the other strength. Similar price.

Wickes Single 3.6Nm aerated block inside (thermally good), cavity fill and Wickes std 7.3Nm dense block (strength) on the outside. Both on this page link.

Is there any flaw in this. Have not got brickie in yet but don't want to ask them to do something that's a bit daft.

Thanks as always for help and advice

Kev

 

[23vc]

No it’s very common. As you say, aerated inner skin popular, much less so outer skin. Altho in your case with cladding it, not really an issue

 

[jj4091]

The only thing I would suggest is not to clad it with wood. You are just making work for the future to maintain it. Have you ever seen an old shed that still looks good years later. To me cladding is just another passing fashion. Get the brickie to point it properly.

 

[Ivor Windybottom]

To me cladding is just another passing fashion. Get the brickie to point it properly.

Totally agree. Wood cladding is a fashion, but it's nothing new.

People have built with wood for centuries, the only reason you don't see more timber old buildings is because the wooden ones almost all turned to compost and were knocked down. The stone and brick buildings that are everywhere are the survivors.

You'll spend the rest of your life daubing toxic goo onto it to try and preserve it, but nature always wins.

Britain has the wrong climate for wood. A desert in the USA is fine, there's no water to feed the rot. An Austrian alp is also OK, as it's too cold for the rot to survive. We have a damp, warm climate that is absolutely perfect for wood rot of all kinds.

Bricks are best, render is a long way behind in second place, wood is for fashion victims.