
Deterioration of plaster, paint and wallpaper
As moisture evaporates, plaster crumbles, paint flakes and wallpaper peels away or bubbles.
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Consequences
Untreated moisture does not remain a cosmetic problem: it can damage coverings, encourage mould and complicate a sale or works project.
Short answer
The consequences of moisture first affect coverings and comfort, then the clarity of a property. They must be distinguished from the causes: to limit them sustainably, the source of the moisture has to be treated before cosmetic work.

As moisture evaporates, plaster crumbles, paint flakes and wallpaper peels away or bubbles.
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Overly humid indoor air encourages mould growth.
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Excess moisture can aggravate asthma, respiratory and pulmonary illnesses, joint rheumatism and the spread of disease.
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Excess moisture encourages bad odours, visible damage and a feeling of cold, creating discomfort and higher energy use as heating is turned up.
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Visible, unexplained damage can complicate a sale, a works project or an insurance claim.
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Hiding the effects without treating the source often means doing the same work again. Treating the cause first makes decorative work last.
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Request a diagnosis. Describe the issues you have noticed and the construction period.