Sub base for porcelain and block paving - Gravel and concrete on top sufficient?

Patio flagstones (slabs), concrete flags, stone flags including yorkstone and imported flagstones.
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Sam82155
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Joined: Mon Apr 09, 2018 11:05 am
Location: preston

Post: # 115533Post Sam82155

Hello I need some advice please.
My builder is using 20mm gravel for sub base (no compression) and plans to pour concrete over it before placing a bedding for porcelain tiles and block paving.
Is that sufficient sub base?

Many thanks in advance
sam82155

lutonlagerlout
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Location: bedfordshire

Post: # 115537Post lutonlagerlout

no!

minimum subbase is 100m compressed type 1

LLL
"what,you want paying today??"

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lutonlagerlout
Site Admin
Posts: 15184
Joined: Fri Aug 04, 2006 12:20 am
Location: bedfordshire

Post: # 115538Post lutonlagerlout

no!

minimum subbase is 100m compressed type 1

LLL
"what,you want paying today??"

YOUR TEXT GOES HERE

Tony McC
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Location: Warrington, People's Republic of South Lancashire
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Post: # 115542Post Tony McC

No damp proof membrane either!

And no disrespect to "builders", many of whom are fine tradespeople, but why are you using a generalist to lay a very demanding and particular form of paving? This really is a job for someone experienced in laying porcelain, a paving specialist - it's damned expensive stuff so you want it right first time, and what you describe is NOT right!
Site Agent - Pavingexpert

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