When you say "Concrete blocks can be cut to fit the same as Q-Con" I assume you're talking about using a wet saw for precisely cutting the concrete block because a true concrete block is heavy & is not easily cut with a trowel or brick hammer unless you're talking about rough cuts.
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In its place came concrete block made from concrete which is load bearing for housing construction. The grey cinder block hasn't been used in the US for probably 20-30 years now because it isn't strucurally sound. I did some calculations on price per sqm for each block including materials and labour:ħcm Q Con Block - 422bt per sqm (r value 3.25)Ģ0cm Q Con Block - 734bt per sqm (r value 8.7)ĭouble grey block wall with fiber glass in gap - 406bt per sqm (r value 9.5)Ĭan you please tell me where you've bought true CONCRETE BLOCK here in Thailand? I have seen, lightweight aerated concrete block, grey cinder block & a load bearing 3 hole heavy red brick made from cement & red clay. Grey blocks are cheaper, some places sell them for 4.5bt each, AAC were 22bt each when I was building last yea, I believe the prices have increased this year. ACC glue is more expensive than standard mortar however you use less of it, basically there is only a very thin layer between each block. You can use standard mortar for grey blocks so any builder can work with them, whereas ACC blocks require their own special glue and not all builders know how to work with them. The R value for a 7cm thick AAC block is 3.25, the grey block has an R value of only 1.
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AAC can be sawed to fit gaps, with grey blocks you have to fill the gaps with red bricks. You can also drill and hammer nails into AAC, you can't do this with grey blocks so this is something to bear in mind if you're planning on installing shelves, air-con etc. Q-Con or AAC blocks are stronger, lighter and have a better insulation value over the grey concrete blocks (breeze blocks).