The Brew Cabin

Posted: **Fri Feb 04, 2005 10:56 am**

I have a new development which is a small courtyard complex and I would like to gravel the drives. I am however worried that with constant turning and parking of cars that the drive/sub base will become rutted. As I am NHBC registered I am worried that I might find myself returing to site to remedy the problem on a regular basis. Is there a binder that I can use that will provide additional stability to the type 1 sub base?

Also on a similar project I have found clay migrating to the surface of the 6" subbase and subsequently through the gravel. I now need to remedy this! Any suggestions? There appear to be mixed opion as to whether a Terran or similar membrane would help.

Any advice appreciated.

Phil

Posted: **Fri Feb 18, 2005 8:11 am**

You could consider laying a solid base such as bitmac or concrete then applying Ronadeck Fast Grip resin bonded aggregate.

See Resin Bonded on this site or Ronacrete web site .

Any questions, give me a ring. 01279 638700.

Regards

Posted: **Fri Feb 18, 2005 9:21 am**

Thanks I'll take a look.

Posted: **Sat Feb 19, 2005 8:47 pm**

You may find problems with Doc M compliance if you rely on unbound gravel driveways, particularly if the main access to the houses is via such a driveway. Loose gravel is not deemed to be satisfactory for disabled persons.

Where you have the problem of the clay sub-grade pumping up through the sub-base, you can counter this by using a permeable separation membrane at the interface between sub-grade and sub-base. Have a read of the Geo=membranes section of the website. There's no mixed opinion here: a membrane such as Terram 1000 or TDP115 would definitely help.

The Brew Cabin

Gravel drives & nhbc