Can dry lining be used on damp walls?

Short answer: Dry lining should not be used simply to hide an active damp problem. Covering a damp wall without treating the cause can trap moisture behind the plasterboard, leading to mould, unpleasant smells, damaged finishes and deterioration of the underlying structure. Before installation, the source of the damp should be identified. Common causes include leaking pipes, defective gutters, damaged pointing, rising damp, penetrating rainwater and poor ventilation. Once repairs have been completed and the wall has dried sufficiently, an appropriate dry lining system may be installed. Moisture-resistant plasterboard can help in humid rooms such as kitchens and bathrooms, but it is not a cure for water entering the building. In some situations, a ventilated cavity, membrane system or specialist damp treatment may be required before the plasterboard is fitted.

Helpful context

The key is to choose the right board and build-up for moisture, ventilation, and insulation, so you avoid hidden problems later.

For a proper quote, we will look at wall condition, moisture, access, insulation, and the finish you want. That keeps the price accurate and avoids surprises later.