On dwarf wall conservatory with both skins built in concrete block is it necessary to fill cavity with concret

Question:on a dwarf wall conservatory with both skins constructed of concrete block is it necessary to fill cavity with concrete upto dpc level

Answers:
yes

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Yes

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it's advisable but not right up to DPC level, 50mm down would be about right as you do not want any water in the cavity tracking across to the inner wall.

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