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Posted: Tue Jan 24, 2006 8:24 am
by southward
I need to site a gazebo in my walled garden and the instructions say it needs to be on a concrete base. Not sure how much turf I need to dig nd if I need to lay the concrete on a membrane. Any ideas, apart from ring a builder..?!! All suggestions gratefully received!
Anna
Posted: Tue Jan 24, 2006 4:10 pm
by MatthewWakeman
Anna
Best practice would be to excavate 125mm of turf and soil import type 1 stone 40-50mm and compact add a sand blinding (20mm) and lay a damp proof membrane on the sand then the concrete bed min 75mm
Hop ethis helps
regards
Matthew
drivewaycompany.co.uk
Posted: Tue Jan 24, 2006 7:13 pm
by southward
Matthew,
Very many thanks for your kind and helpful reply - much appreciated!
Anna
Posted: Sat Feb 04, 2006 8:48 am
by Tony McC
Construction of a simple concrete slab is covered on the main website - see Concrete hardstanding page.
I'm not so sure about Matthew's suggestion to use 40-50mm of sub-base. That's not really enough to be anything other than a blinding. Sub-bases should always be at least twice the depth of the largest particle, and given that Type 1 material has to pass through a 37.5mm sieve, that means you need at least 75mm for it to act as a sub-base.