Driveway base

[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.

[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

[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!

[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)

[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!

[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.

[London Stone Paving]

P.s, why does Yorkstone add to the complication?

[bigwest]

It's reclaimed York Stone, only the crazy paving element that complicates things a bit further in terms of time to lay.

[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

[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.