Grow Room Foam insulation board?

[SHRED]

When I get done with my garage makeover I'm thinking it would be best to fit a rigid foam insulation board under the tent to protect plants from the cold concrete floor..

Will that work?

 

[Drownomatic]

I don't think it could hurt in the winter, but in the Summer, I'd remove it.

 

[JP1]

I had one under my tent for a while. The blue foam kind. Put a piece of plywood of something over it since the insulation gets crushed pretty easy and put the tent liner on top of that