Damp Proofing Specialist
A damp proofing specialist diagnoses and treats damp problems in residential and commercial properties. From rising damp and penetrating damp to condensation issues, they identify the root cause and apply appropriate treatments to protect your property.
What does a damp proofing specialist do?
Damp proofing specialists diagnose and treat all forms of dampness, including:
- Rising damp diagnosis and treatment (DPC injection, physical DPC)
- Penetrating damp investigation and repair
- Condensation assessment and ventilation solutions
- Basement and cellar waterproofing (tanking systems)
- Timber surveys for wet rot and dry rot
- Dry rot treatment and structural timber repair
- Mould removal and prevention
- Damp-proof membrane installation
Do damp specialists need qualifications?
Damp proofing is not a legally regulated trade, but accurate diagnosis requires specialist knowledge. The Property Care Association (PCA) is the leading professional body, and PCA members must hold a Certificated Surveyor of Timber and Dampness (CSTDB) qualification or equivalent.
PCA members follow a code of practice and offer insurance-backed guarantees. Misdiagnosis of damp is common — particularly confusing condensation with rising damp — and leads to unnecessary and ineffective treatment. Independent surveyors with RICS or PCA qualifications can provide unbiased assessments.
What to look for when hiring a damp specialist
When choosing a damp proofing specialist, consider:
- PCA membership — PCA members are qualified, follow professional standards, and offer transferable guarantees.
- Accurate diagnosis — Insist on a proper diagnosis with moisture meter readings and investigation, not just a visual assessment. Beware of companies that diagnose rising damp without thorough testing.
- Independent survey option — For significant investment, consider getting an independent survey from a chartered building surveyor before committing to treatment.
- Insurance-backed guarantee — Damp treatment should come with a guarantee backed by an insurance scheme in case the company ceases trading.
- Cause not just symptom — Good specialists address the cause of damp, not just mask the symptoms with tanking or replastering.
Frequently Asked Questions
How much does damp proofing cost?
A professional damp survey costs £150–£350. Rising damp treatment (DPC injection) costs £50–£70 per linear metre of wall treated, so a typical room costs £2,000–£5,000 including replastering. Basement tanking costs £80–£150 per square metre. Dry rot treatment costs £1,000–£5,000+ depending on the extent of the outbreak.
How do I know if I have rising damp or condensation?
Rising damp creates a tide mark up to about 1 metre on ground floor walls, with staining and salt deposits. Condensation causes mould growth, typically in corners, behind furniture, and around windows, and is worst in winter. Condensation is far more common than rising damp. A professional surveyor with a calibrated moisture meter can distinguish between them — this is important because the treatments are completely different.