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Whether you have had a rising or penetrating damp problem, it's essential that the correct plastering materials are used after the treatment to prevent further damage to internal decorations.

Where plaster needs to be renewed because of contamination with hygroscopic salts, it’s vital that a special salt retardant additive is used. This additive is used to hold back any residual salts while still allowing the passage of water vapour, allowing walls to breathe. Standard plasters such as Carlite should not be used as they cannot prevent the migration of hygroscopic salts and a failure to follow this instruction is the most common cause of continuing wall dampness after a remedial damp proof course has been installed.

Any plastering done internally is completed with a skim finish giving no visual differences to existing plastering. Where there are steps in floor level, we recommend applying a waterproof slurry coat to prevent moisture ingress through masonry below the level of the remedial damp proof course.

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Why should standard plastering not be used?

Hygroscopic salts in the masonry prior to the damp proof course will stay within the masonry causing damage to any new plastering. A salt retardant additive is necessary to stop salt migration into the new plaster, stopping it from destroying decorative features.

Recommend Method for Salt Retardant Plasting

Recommend Method for Salt Retardant Plasting

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