Moist Basement Concrete Wall Repair Crumbling

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Moist basement concrete wall repair crumbling. Apply small amounts of water over a short period until it has absorbed water deep into the wall. If dry the moisture is originating elsewhere in the basement most likely from a basement shower easily remedied by installing a vent fan in the bathroom to direct steam outdoors. The walls in my 63 yr old full walk out basement are crumbling in spots. Now you should apply water to the wall where you will be applying the mortar.
Mist the wall with water and then apply a coat of thoroseal with a latex additive check on amazon. The walls have been painted and the wall is crumbing in several places behind the paint and salt like particles have formed.