Nordic Damp Proofing recently completed a comprehensive damp proofing project within a conservatory in Warminster, addressing elevated moisture levels and hygroscopic salt contamination affecting the original external wall of the property.
Following a detailed damp survey, we identified that the original external wall, which now sits within the conservatory structure, was suffering from ongoing moisture ingress and salt contamination. Left untreated, these salts would continue attracting moisture from the atmosphere, causing recurring damp patches, decoration failure, and deterioration of future plaster finishes.
To provide a long-term solution, we carried out a full damp proof course injection and mesh membrane isolation treatment throughout the affected areas of the conservatory.
Our Initial Damp Assessment
During our survey, elevated moisture readings were detected throughout the original external masonry wall. Testing also revealed hygroscopic salt contamination within the brickwork.
These salts naturally attract moisture from the air and can continue causing damp symptoms even after the original source of moisture has been addressed.
The conservatory is directly connected to the kitchen area of the property, with plans for underfloor heating being considered by the homeowner. This made it particularly important to install a suitable isolation system that would prevent future moisture and salt transfer through new finishes.
Issues Identified
• Elevated moisture readings within masonry walls
• Hygroscopic salt contamination present
• Historic moisture ingress through external brickwork
• Exposure to driving wind and rain
• Elevated external ground levels contributing to moisture retention
• Risk of future decorative failure if untreated
Understanding the Cause of the Damp
The original external wall faces south-west and is heavily exposed to prevailing weather conditions.
Over many years, wind-driven rain had been absorbed into the brickwork, allowing moisture to track through the structure. The wall also showed signs of historic moisture penetration around the original masonry and roof line junctions.
During the survey, we also discussed elevated external ground levels with the homeowner. As part of the overall solution, drainage improvements and ground levelling works were planned to ensure there would be no future bridging of the damp proof course.
By addressing both the cause and the symptoms of the damp issue, we were able to provide a permanent solution rather than simply covering over the problem.
Drill & Injection Damp Proof Course Installation
To protect the masonry from future rising moisture, we installed a specialist drill and injection damp proof course system throughout the affected brickwork.
This creates a new moisture barrier within the masonry, preventing water from travelling upwards through the structure.
Benefits include:
• Stops rising damp within brickwork
• Creates a new damp-proof barrier
• Suitable for older properties and extensions
• Long-lasting protection
• Works alongside membrane systems for complete damp management
Mesh Membrane Isolation System Installation
Due to the extent of the salt contamination identified during our survey, we recommended a full mesh membrane isolation treatment across all visible brickwork within the conservatory.
The membrane system isolates the contaminated masonry from future plaster finishes, preventing moisture and salts from migrating through to decorative surfaces.
The treatment included:
• Mechanical fixing of specialist mesh membrane system
• Full isolation of affected walls
• Treatment around window reveals and openings
• Isolation of lower wall sections throughout the conservatory
• Preparation ready for the homeowner’s chosen finish
The membrane system provides a robust barrier that allows the masonry behind to remain isolated while preventing future damp-related issues internally.
Ready for the Homeowner’s Finishing Touches
Once the damp proofing works were completed, the conservatory was left ready for the homeowner to carry out their preferred finishing works.
This allows complete flexibility over:
• Plaster finishes
• Insulated boarding systems
• Decorative wall finishes
• Flooring installations
• Underfloor heating installations
The damp proofing system remains fully protected behind the finished surfaces.
Long-Term Damp Protection with Warranty
The completed system provides long-term protection against moisture ingress, salt contamination and future decorative failure.
The homeowner now has peace of mind knowing that the original damp issues have been correctly diagnosed and professionally treated.
The installation was completed with warranty protection and designed to ensure the conservatory remains dry and protected for many years to come.
Why Conservatories Often Develop Damp Problems
Many conservatories are built around what was once an external wall of the property. These walls have often spent years exposed to weather conditions before becoming enclosed.
Common issues include:
• Salt contamination from historic moisture ingress
• Rising damp within older brickwork
• Wind-driven rain penetration
• Bridged damp proof courses
• Condensation caused by temperature differences
• Ground level issues around extensions
A professional survey is essential to identify the true cause before any treatment is recommended.
