I had a pipe burst in my basement. I have pulled off the drywall from the studs and removed the insulation. I can see that there is what appears to be a piece of drywall glued to the concrete wall. Any idea of what it is? Is it required? Should I replace it with rigid foam? The basement was previously finished so I am assuming that all outside walls have this same "drywall" on the concrete. The section that I am working on is dry and the drywall is fine.
Hey, dealing with a burst pipe is never fun. That "drywall" glued to the concrete wall is likely a form of insulation or a vapor barrier. Its purpose is to help regulate moisture and temperature. If it's still in good shape and doing its job, you might want to keep it.
Now, if you're thinking of replacing it, rigid foam could be a good alternative. It provides insulation and moisture resistance. Just make sure you seal it well to prevent any future issues.
Since your basement was previously finished, it's quite possible that all outside walls have a similar setup. If the current "drywall" is doing its job and the area is dry, you might just leave it be. But if you're keen on upgrading, rigid foam can be a solid choice. Always good to weigh the options and maybe consult with a local expert to get the best fit for your situation!
I would contact a plumber as I am not. And assess the situation together.
If it's an older home 50 early 60's it's actually a type of fiber insulation they used in the day, not very good regardless, if newer house or actual drywall it was some homeowner or amateur undertaking & incorrect... A properly done basement/frost wall is framed with a min, 1/2 inch from concrete, batt insulation and vapor barrier on warm side... Remove any crap from concrete and do it right, it makes no sense leaving materials that can retain moisture and then mold. A air space to concrete is best with walls done as described. You do not need to add styro foam as well, that is overkill and a needless expense. You should never use Styrofoam only either it has a poor R value compare to a good thermal insulation like Roxul. I am not a fan of spray foams, it's full of chemicals & costs the most
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