View Full Version : Useing Poly When Going OVer Concrete? No No

04-11-2010, 04:13 PM
Does anyone know why?

SuperSand Bond has the ability to expand and condense. This elasticity ensures that the paver joints avoid cracking and are properly filled at all times. Thus, it will also help prevent insect penetration and weed sprouting. SuperSand Bond should only be used when pavers or tiles are installed on a drainage bed system (stone dust, crushed stone, sand). It is not recommended when pavers or tiles are set above a concrete base.

04-11-2010, 05:12 PM
You answered your own question. Polysand has to be able to drain.

04-11-2010, 09:18 PM
Wouldn't the water drain off the top of the pavers? Would the poly just stay wet longer and that is a problem. I'm still confused as to why the poly needs to have proper drainage?

04-11-2010, 09:58 PM
My guess is that it will get spongy or freeze and expand if it can't drain. I'm just going on what I've read.
I'm interested in hearing about other's experiences doing this. For me, I would rather use mortar if the concrete is in good shape, so I have only used polysand over a gravel base.