Painting over mould
- Mould paint may improve the surface temporarily
- Persistent humidity, cold bridging or inadequate ventilation can allow growth to return
- The moisture load and air movement should be reviewed first
Home / Why Damp Treatments Fail
Diagnosis before productsWhy damp treatments fail.
A product can be installed correctly and still be the wrong answer. Durable remedial work starts with the moisture route, the construction and the intended use of the space.
Cause before treatmentSymptoms can have several sources
Compatible materialsPlaster and finishes matter
Water managementDrainage and pressure considered
AftercareDrying and ventilation guidance
Injecting a DPC without confirming rising damp
- Low-level damp can also relate to leaks, external levels, salts or condensation
- Wall construction and accessible evidence should support the diagnosis
- Associated plaster and ground-level defects may need their own scope
Using incompatible plaster
- Salt-contaminated walls can damage unsuitable finishes
- Dense or impermeable layers may trap moisture in some constructions
- The plaster, primer and decoration system should suit the substrate and treatment
Ignoring ground levels and drainage
- Bridged damp-proof courses and poor falls can keep masonry wet
- Defective gutters, downpipes and gullies can concentrate water beside the building
- External defects should be coordinated with internal repairs
Reducing ventilation
- Blocking vents can increase internal humidity
- Extract systems need suitable capacity, positioning and maintenance
- Heating, occupancy and drying loads affect the result
Waterproofing without water management
- Below-ground water pressure and junctions require a system-led design
- Maintainable drainage and pumps may be relevant to cavity-drain systems
- The written scope should state access, maintenance and limitations
Assessment & quotation
Request an assessment.
Send the postcode, property type, photographs and a brief description. We will help identify the most useful next step.
Free quotations are available for clearly defined remedial works. A Professional Damp Survey & Written Report is £220 + VAT and includes findings, photographic evidence and written recommendations.
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