The Brew Cabin

Posted: **Wed Sep 07, 2016 9:30 am**

Hello there

I'm currently in the process of replacing my concrete driveway with gravel. Concrete is now removed and i was planning to lay geo-textile before 150mm DpT1 and then the gravel.

I have a question though regarding the existing sub-base material which was under the concrete, it looks like this is Ash/Cinders (very similar to the photo in the aggregates section of the website) I have dug most of this off to level the drive in preparation for laying the geo textile but there is still around 30mm on top of the sub-grade. Will i be ok to lay the geo-textile over this? I'm just concerned this seems quite fine and crumbly and will the textile slip around after the DpT1 is laid on top?

I have a photo but i'm unsure how to post it here?!

many thanks in advance!
Leon

Posted: **Wed Sep 07, 2016 6:17 pm**

We used to use clinker as a sub base years ago. Apart from footpaths done in pfa o have only ever used it under a concrete, or tarmac overlay. It does compact well and has load bearing qualities. But i have never used it under a stone drive. Others may have used it for gravel drives and can give you the green light.

Posted: **Thu Sep 08, 2016 9:59 am**

Thanks for your help seanandruby, much appreciated - hopefully this will be ok once compacted then..

The Brew Cabin

Gravel drive sub-base