Im trying to find out how to lay my runs out over a spancrete floor before pourring a 2" concrete topping.

Other than laying down reinforcing mesh, the only method ive come up with is Viega snap panels, they work out about $1 per SF.

I need some kind of membrane to seperate the topping layer from the spancrete bcause of the different expansion characteristics, so the cost of membrane and mesh is probably going to be close to the snap panel cost. Snap panel looks a lot quicker.

Anyone had any experience using it? http://www.viega.net/4886.htm

Thanks

Peter