Recent content by not5diy

Hi, Jbonding is talking nonsense. Rudders & Paynes advice is exactly right. The purpose of a render as a plaster backing coat is NOT to prevent dampness. This is done by the injected dampcourse. The render specification is there to prevent the migration of hygroscopic salts into the plaster...

Hi, As the last respondant says, these are salts usually, but not invariably, Sulphates. They are common below DPC level particularly where common bricks or facing bricks have been used below DPC level or where the mortar mix is weak. As long as no physical disruption of the floor surface is...