0 Helpful?

Basement slab insulation

I am working on insulating my basement from the interior. I would like to install a 1" layer of EPS as shown in the Fine Homebuilding "The Stay-Dry, No-Mold Finished basement". At this point we are about to pour concrete around the perimeter of the basement where we installed a drain tile, as well as a new 10x10 slab in one corner of the basement. Is there a certain amount of time I need to let the new concrete cure before covering it with the EPS? If I have access to commercial polysio, is that ok for use over a basement slab?

Thanks for any feedback

Asked by Charles Chiampou
Posted Jun 6, 2014 6:12 PM ET

Tags:

1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Charles,
Your slab will continue to cure even if it is covered with rigid foam, so you can pursue your plan after just a few days, as long as you aren't encountering any problems with your TapCon fasteners.

Do you know whether your existing slab has polyethylene under it? Many older slabs don't. If I were you, I would stick with EPS or XPS in this location, in case the older slab ever got wet. Polyisocyanurate doesn't perform very well when it gets wet, and it won't have the same compressive strength as XPS or EPS.

Answered by Martin Holladay
Posted Jun 7, 2014 6:39 AM ET
Edited Jun 7, 2014 6:41 AM ET.

Other Questions in Energy efficiency and durability

Energy efficient attic exhaust fan?

In Energy efficiency and durability | Asked by housenerd | Mar 25, 17

PV panels on the roof or in the yard?

In General questions | Asked by user-6801629 | Mar 24, 17

ERVs and dusty homes

In Mechanicals | Asked by John Ranson | Mar 25, 17

Saving a wet crawlspace

In General questions | Asked by Nick Rudnicki | Mar 19, 17

2 layers vs 1 of outsulation?

In Energy efficiency and durability | Asked by Adam Fuller | Mar 24, 17
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!