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Posted: Tue Aug 28, 2012 3:56 pm
by bigwest
Be very grateful if someone could confirm the best spec for a paved driveway sub-base. I'm thinking 100mm concrete base.
The paving is York Stone with some very thick pieces and others thinner so should the concrete be over 100mm type one as well?
It's a nightmare site with really tough access, so whilst I don't want to scrimp on taking stuff out or in I want to make sure I get the spec right.
Many thanks.
Posted: Tue Aug 28, 2012 5:23 pm
by lutonlagerlout
100mm stone and 100mm of concrete
then your flags
LLL
all depending on site conditions etc
i.e. chalk is a very good sub grade
Posted: Tue Aug 28, 2012 5:30 pm
by bigwest
Cheers LLL, the sub grade is pretty good, the house is 400 years old so there's layers of compacted stone/rubble under the current tarmac.
I'm up to 18 cubic metres dig out so far and it all has to go out through a covered entrance I can just about squeeze my little cabstar through.
could be fun!
Posted: Tue Aug 28, 2012 10:26 pm
by ringi
I am not a professional paver, but I have had a thought given site access issues.
Could you put down 150mm of concrete pumped in and levelled spot on and have the York Stone all cut to the same depth. Then lay the stone in a bed of strong mortar. This is trading more material costs for less hard work…
(I never understand way people buy cheaper uncelebrated stone just to have to spend more laying it, If I recall correctly London Stone is now doing celebrated reclaimed stone)
Posted: Tue Aug 28, 2012 10:47 pm
by bigwest
Will have to have a look at London Stone, it's Crazy Paving in York Stone as well just to add to the complications.
Would love to get the concrete readmixed and pumped in but the entrance to the site is on a mini roundabout so nowhere for any deliveries to stop.
Interesting one this bit of contingency in the estimate methinks!
Posted: Tue Aug 28, 2012 10:58 pm
by London Stone Paving
what type of Yorkstone is it? Reclaimed or new riven?
We do a lot of calibration but its an expensive process. Were currently looking at installing some additional machinery to speed up the process but it wont be for a few months.
Generally people will have the occasional piece calibrated to fit on to am exisiting step or something similar.
Posted: Tue Aug 28, 2012 10:58 pm
by London Stone Paving
P.s, why does Yorkstone add to the complication?
Posted: Wed Aug 29, 2012 8:36 am
by bigwest
It's reclaimed York Stone, only the crazy paving element that complicates things a bit further in terms of time to lay.
Posted: Wed Aug 29, 2012 11:24 am
by London Stone Paving
Whats the area? Sounds like it would be more expensive to calibrate the stone than to lay it in its current variable thickness. The one good thing is that with it being crazy paving, the pieces should be reasonably small and easy to handle
Posted: Wed Aug 29, 2012 12:28 pm
by bigwest
They've got about 20 sq m on site and we need about another 60, I wasn't banking on being able to get anything calibrated to be honest.
That is definitely one bonus to the crazy paving, that York Stone is heavy and we can't get it delivered straight to site.