Q1: What does damp proofing mean?
A1: Damp proofing is a general term for treatments that address moisture issues like rising damp, penetrating damp, and condensation. Typically, it involves installing a damp proof course (DPC) to prevent damp problems, often through damp proof injections.
Q2: What is a damp proof course?
A2: A damp proof course is a barrier that prevents water from rising into walls, protecting the building from damp damage. Most UK properties built after the 1920s include a DPC, but these can deteriorate over time, leading to moisture issues.
Q3: Is damp proofing covered by building insurance?
A3: Most home or contents insurance policies do not cover damp-related issues.
Q4: What causes damp?
A4: Damp can be caused by rising damp, penetrating damp, or condensation. Damp in basements or cellars may result from hydrostatic pressure and often requires specialized waterproofing services.
Q5: What’s the difference between damp proofing and waterproofing?
A5: Damp proofing protects against ground moisture above ground, while waterproofing prevents all water ingress, including underground or below-ground damp and flooding.
Q6: Can you DIY damp proofing?
A6: Simple fixes, like sealing cracks or improving ventilation, can be DIY. However, rising damp requires professional treatment, so consulting an expert is recommended.
Q7: When can I redecorate after damp proofing?
A7: Wait until the plaster is fully dry before redecorating. Use water-based paint initially, as walls may continue to dry out for up to 6 months (for 150mm walls) after treatment.
Q8: What is a damp proof membrane?
A8: A damp proof membrane (DPM) is installed beneath floors or on the internal side of external walls to prevent ground moisture from reaching surfaces. External walls should also be water-resistant to prevent moisture penetration.
Q9: Does my property have rising damp?
A9: Rising damp is uncommon; not all moisture issues are due to rising damp. A professional damp survey is recommended to accurately diagnose and treat the issue.
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