yes, as a moisture barrier
A minimum of 4 inches of gravel should be placed under concrete for proper installation.
yep!
No, you cannot autoclave polystyrene for sterilization purposes as it may melt or deform under high heat and pressure.
Crush a polystyrene cup under the armpit.
i think so
find the answer on autozone.com under specifications.
Crushed stone or gravel with angular edges is recommended for use under concrete to provide proper support and stability.
Yes. Many of the foam insulations (including expanded polystyrene) are highly combustible, and may not be used except when installed under a fire resistive covering, such as drywall.
If your concrete padio was installed correctly with the correct amount of class 5 material placed under it the flagstone will be fine up there. I landscape and have a few of these and have never had any reported issues from clients.
You can but it will not grow. it will if theres water under the concrete
get rid of the concrete! / get a plumber!
The electrical is down at 36". It should not affect your driveway.