Can anyone tell me where I can buy 8'x4' sheets of polystyrene foam or something similar for cavity insulation in or around Udon Thani please, thank you.

There actually really isnt a need for cwi here,, especially using the thermal benefits of aerated concrete blocks.

You can still have your cavity between two 100mm blocks or just use a 200mm block and if you really wanted insulation then you can buy poly bonded plasterboard for the internal face.

Polystyrene sheets are available in sheets upto 150thick but stockists few and far between. I think but not sure that the SCG stores can get it.

22 hours ago, eyecatcher said:

There actually really isnt a need for cwi here,, especially using the thermal benefits of aerated concrete blocks.

You can still have your cavity between two 100mm blocks or just use a 200mm block and if you really wanted insulation then you can buy poly bonded plasterboard for the internal face.

Polystyrene sheets are available in sheets upto 150thick but stockists few and far between. I think but not sure that the SCG stores can get it.

The aerated concrete block has no real load bearing capabilities as i intened to build a cavity wall and place a wall plate on top of the wall to carry the roof, its not a standard thai house but a typical western (uk) build and the insulation is just to keep the heat out, I don't believe it's possible to get a standard 9" block here either???

They do 200mm aerated blocks.

And I do believe, since aac blocks are used extensively in the West that they are loadbearing.

They also make lintels and padstones.

Not so easy to copy a uk house build.

If anything the west is missing a trick by not building concrete columns. Totally makes sense and makes the job quicker and easier.

 

Imagine all those miserable bricklaying weeks before they even have a roof on, with colimns the roof is usually on before any other trades start.

22 hours ago, Damian Murray said:

The aerated concrete block has no real load bearing capabilities as i intened to build a cavity wall and place a wall plate on top of the wall to carry the roof, its not a standard thai house but a typical western (uk) build and the insulation is just to keep the heat out, I don't believe it's possible to get a standard 9" block here either???

Well the main company who make them does not agree

Quote

Hebel AAC block units can be designed as unreinforced or reinforced load bearing and non-load bearing walls. 

You are correct that 9" blocks 22.85cm blocks are not easily available but 20cm (just under 8”) are common. Q-Con lists a 25cm block and suggest that anything 10cm and over can be load bearing.

https://qcon.co.th/wordpress/wp-content/uploads/2013/09/QCON-Handbook-English.pdf