HyperVent Marine

I think i like the Dri-Dek at this point. Are the tiles made of plastic or rubber? Do you think the optional corners and edgeing is necessary. After you install the tiles can you slide the mattress back into place without the tiles moving.l

- The tiles are made of PVC. So, they're plastic, but flexible enough to be used on a (floor/deck/cabover) surface that's not perfectly flat.

- The corners & edging are decorative. They'd be handy if your cabover area doesn't measure out to a whole-foot increment, but not at all necessary.

- The tiles are lightweight and can slide easily on the cabover surface, however all of the tiles interlock together and once the grid is assembled it's pretty easy to move the mattress around on top of it.

- IMO, don't get too hung up on the Dry-Dek brand. There are quite a few manufacturers of plastic decking tiles and all of these products do the same job of allowing for some air circulation under the mattress. There's no shame in choosing the lowest cost one.
Also, I would not personally choose to use any of the compressible options that have been presented here, due to the fact that they could compress (locally) while the mattress is in use which could reduce airflow.

Cheers,
-Mark