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Trench Blocks 20mm out

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19 Apr 2022
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3 courses of Trench blocks have drifted inwards at the end of the run, shall i overhang inner blocks or bring everything in 20mm and reduce 100mm cavity to 80mm cavity is full fill batts ?
 

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A maximum 20mm overhang towards one end of the run shouldn't be an issue.
The old rule was that you could overhang up to 1/3 the thickness of the block, as long as there are plenty of ties.
 

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