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Posted: Wed Dec 14, 2011 5:09 pm
by London Stone Paving
We have been spec'd to do a commercial paving project in East London. One of my sales team showed me the drawings today and the architects had allowed for:
50mm thick paving
40mm bedding layer
100mm type 1
This sounds a bit light for a commercial paving job. Does anyone know what the right spec is for commercial grade installations?
Posted: Wed Dec 14, 2011 5:16 pm
by rab1
try marshalls web site?.
Posted: Wed Dec 14, 2011 5:21 pm
by London Stone Paving
You making me work for it rab ?
Just had a look on there and was instantly scared off by just a mass of information
Posted: Wed Dec 14, 2011 5:30 pm
by London Stone Paving
Just to clarify i'm looking for the spec for the bedding layer and the MOT layer, not the paving material
Posted: Wed Dec 14, 2011 6:22 pm
by Dave_L
Pedestrian only area?
Posted: Wed Dec 14, 2011 6:32 pm
by London Stone Paving
yeh Dave, its for a pavement
Posted: Wed Dec 14, 2011 7:05 pm
by lutonlagerlout
chris AKA ilovesettsonmondays has done extensive pavement work in the west end of london so he would be the man to tell you
on the disabled ramps, we have to have minimum 100mm of type 1 compacted and 50mm of 4:1 grit sand/cement
but we often use lean mix instead of type 1 as there can be 400mm of fill
chris will know definitively
LLL
Posted: Wed Dec 14, 2011 7:29 pm
by ilovesettsonmondays
different specs for different councils . in highly pedestrianised areas i.e town centres ,west end etc, 150mm of kerb mix , then 50mm of sand and cement through mixer 4:1 or even bought in screed with 3 day retarder .63mm slabs minimum . i have only ever used 50mm slabs on a pavement once and that was on a quiet surbuban(is that spelt right???) street in dagenham.some councils use 150 mm of type 1 as sub base to save on cost.
Posted: Wed Dec 14, 2011 8:06 pm
by Pablo
That spec barely cuts the mustard for a private patio let alone public paving. 50mm natural stone will be perfect but the subbase is way to thin. Every natural stone projest over here is laid on a concrete sub base with a 50mm screed bedding layer because it's only a matter of time before a vehicle is driven on it or a large cherry picker etc if that happens with that spec it's finished. If it were me I'd recoomend a 150mm concrete subbase but if you're supply only then all you can do is make your reservations known and bank the cheque.
Posted: Wed Dec 14, 2011 8:28 pm
by ilovesettsonmondays
50mm slabs are not good enough for a pavement . seen 50mm york laid before . looks like crazy paving in a few months after cars mounting the kerb .
Posted: Wed Dec 14, 2011 9:05 pm
by Pablo
Yorkstone is softer than cheese so yes it should be thicker all the granite Caithness and Kilkenny limestone stone slabs I've laid have been 50mm and never seen a break in it.
Posted: Thu Dec 15, 2011 8:57 am
by Bec@LondonStone
Hi guys, I'm on the sales team working on this project at the moment. Thanks for all your replies, they're really helpful. The paving is Granite so I think the 50mm will be fine. Pablo, I think you're right - all I can do is let them know our concerns and let them take it back to the architect.
Posted: Thu Dec 15, 2011 4:03 pm
by lutonlagerlout
welcome to the brew cabin beccy 
LLL
Posted: Thu Dec 15, 2011 9:43 pm
by haggistini
Hi beccy and welcome to the brew cabin. I have worked on commercial spec streetworks and it has been anything from 300mm concrete 100mm sceed 150mm granite slabs. It all comes down to the architect and the math! Paving layed right will take most traffic. Just like the roman road over the Beacon's mountain by me it's only 2000 yrs old it's a nice walk and a decent pub at the end of it if you fancy it?
Posted: Thu Dec 15, 2011 10:04 pm
by pickwell paving
Steve, Beccy, have you had a look on interpaves website ? A fairly generous amount of information on there regarding specs etc, just have to register e mail address to access it.interpave