The Brew Cabin

Posted: **Sat May 05, 2007 10:45 am**

Hello
I am extending an existing patio just by about 1.5m sq to put a kids plastic playhouse on. I have used a base of just concreting sand, on top of a plastic sheet becsue it doesn't need to be too strong. My question is do I need to wet the area once the slabs are laid or will it just bake hard?
thanks

Posted: **Sat May 05, 2007 11:02 am**

you shouldn't have plastic underneath as it will hold the water in. you need to have a 10 to 1 sand/cement mix, especially if there is no borders to stop sand migrating.

Posted: **Sat May 05, 2007 11:22 am**

No, sorry I didn't put any plastic sheet down. I thought about it but didn't actually do it!

Posted: **Wed May 09, 2007 5:32 pm**

Concreting sand on its wown will not "bake hard": it's sand for making concrete, and not actually concrete itself. To make concrete, you need to add cement, coarse aggregate, and probably some water.