Groundwater – How can groundwater compromise the inground swimming pool vessel? Gunite needs 28 days to properly cure, but the first 48 hours are the most crucial. Fresh gunite that is exposed to groundwater can be structurally compromised. As the water infiltrates the newly applied gunite, it basically washes out the concrete and leaves the weakened aggregate behind. The problem with this usually becomes apparent several years down the road when the homeowner decides to upgrade the pool plaster and drains the pool. Once the pool is drained, the pressure relief plugs which normally allow the groundwater to enter the pool vessel and reduce the pressure on the pool shell are rendered useless. If the groundwater reaches weakened gunite before the pressure relief plugs, the pool will crack under pressure where the groundwater compromised the gunite during installation. In other words, a cosmetic upgrade becomes a difficult structural repair.


Satisfied customers are saying