How do I know which type of damp I have?

Use the location, height, timing and relationship with rain or indoor moisture as clues. A visible patch alone rarely proves one cause.

Should I buy a treatment before finding the cause?

Usually no. DampDeck recommends narrowing the moisture source first so products or professional work match the actual problem.

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✓ Cause before treatment◎ Evidence-led guidance⌖ Local professional options£ Relevant product choices

Start here

Use the visible pattern, timing and room location to understand what is driving the moisture before choosing a repair, treatment or product.

DampDeck may earn commission from qualifying purchases or referrals. Commercial relationships do not change the diagnostic order of the site.

Next useful step

Use the symptom-led diagnosis or search for the professional service that fits the likely cause.