Subbase - Choices

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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bill
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Joined: Tue Mar 31, 2009 9:43 am
Location: Devon

Post: # 36653Post bill

I am laying a stone patio and have consolidated the subgrade and subbase in anticipation of remaining layers.My dilema is I have a lot of what my local builders merchant calls "ballast"or "20mm stone to dust" left over from another part of my house project.Would this be suitable or even preferable to use to bring level up to bedding layer instead of compacted and screeded sharp sand? I imagine it will be harder to screed,but is it ok to use?
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Tony McC
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Location: Warrington, People's Republic of South Lancashire
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Post: # 36665Post Tony McC

Yes - it will be OK for a patio. I'd be reluctant to use iot for a driveway, but you should be fine using it beneath a patio
Site Agent - Pavingexpert
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bill
Posts: 9
Joined: Tue Mar 31, 2009 9:43 am
Location: Devon

Post: # 36696Post bill

Thanks Tony but just out of interest does this sugest that compacted sharp sand is prefrable?
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Tony McC
Site Admin
Posts: 8346
Joined: Mon Jul 05, 2004 7:27 pm
Location: Warrington, People's Republic of South Lancashire
Contact:
Contact Tony McC

Post: # 36697Post Tony McC

Not for a DIYer - use mortar: see Bedding Materials
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