Cavity fill

Joined
16 Jun 2020
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Hi my cavity walls fall half a metre below ground,just wondering why a weak semi dry mix is required,I understand for the walls not to cave in,but why a weak mix,couldn't I over order on c25 mix for the floor slab and fill cavity with this,save loads of time..

Thanks
 
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Joined
16 Jun 2020
Messages
49
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0
Country
United Kingdom
Great thanks for quick reply,just strange every where you look it's always weak mix..

Thanks again
 
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