Originally Posted by tinpants

The idea of putting the kiln dried sand on before wacking is to allow the wacker to vibe the sand into the spaces between the blocks thereby locking them together. I've done literally acres of block paving in the course of my business and also do tarmac and stamped concrete.

2 layers of type 1 GSB in 75mm increments is what I'd recommend with the geotextile on top. I used to use sharp sand to lay the paviors on but switched to stone dust as it binds together better post wacking. Just make sure you keep it dry as it turns to porridge in the rain - it'll be fine once its laid though.

As regards costings, it all depends on the blocks you opt for, but I would say that if you went for something like Marshall's Driveline 50, you shouldn't be paying much more than £70 per sq m laid. The price of £5000 for 50 sq m is way OTT IMHO. I would be expecting it to sing "God Save The Queen" whenever I drove on it for that price!!!!

Hope this has been of some assistance. If you need any more help / advice then drop me a pm.