Tarmac over concrete - Good idea or not?

[ashton]

Help and advice please. Have a tarmac driveway (about 20 years old probably) that had been laid on top of a waffle-looking concrete drive. Its now crumbing and lifting in places especially at unsupported edges. There are also some cracks which appear to be directly above cracks in the underlying concrete. It looks as though the tarmac would actually lift off fairly easily from the concrete. What would I need to do to re-tarmac on top of the concrete? The drive is about 20m x 3m.

[surreyhillslandscapes.com]

If the concrete is cracked below then a new sub-base is needed, when laying tarmac on top of concrete a tack coat is needed to help bind the wearing course to the underlaying concrete.
More here
http://www.pavingexpert.com/tarmac01.htm

[ashton]

Thank you, gives me a lot of reading to do.

[matt h]

enjoy...all is revealed within the pages that you peruse courtesy of the Macman

[ashton]

Thanks again (I think!)