Nordic Damp Proofing recently completed a penetrating damp treatment to a first-floor bedroom in Portsmouth after signs of moisture damage were identified on an external wall.
Following our damp survey, we recommended a cavity drainage membrane system to permanently isolate the affected masonry from the internal finishes, preventing further moisture damage while allowing the wall to continue drying naturally.
The completed treatment provides the homeowner with a long-term solution, leaving the wall fully prepared for redecoration.
Identifying the Cause of the Damp
The property had developed penetrating damp affecting one corner of the first-floor external wall. Moisture had caused the internal plaster to deteriorate, resulting in visible staining and damage to the decorative finish.
Rather than simply repairing the surface, it was important to remove the affected plaster and install a specialist damp-proofing system that would prevent moisture from affecting the new finish in the future.
Our survey ensured the correct treatment was recommended based on the condition of the wall.
Removing the Damaged Plaster
The first stage of the project involved carefully removing all deteriorated plaster from the affected section of wall.
This exposed the original masonry and allowed us to prepare the surface correctly before installing the damp-proofing system.
Removing contaminated plaster is an essential part of the process, ensuring that damaged materials are not trapped behind the new finish.
Installing the Damp Proof Mesh Membrane
With the masonry prepared, we mechanically fixed a specialist cavity mesh membrane across the affected wall.
This membrane creates a permanent barrier between the wall and the new plaster finish, preventing residual moisture from migrating into the internal decoration while still allowing the wall behind to breathe naturally.
Benefits of the membrane system include:
- Prevents moisture reaching internal finishes
- Isolates contaminated masonry
- Creates a stable base for replastering
- Provides a long-term damp-proof solution
- Reduces the risk of recurring damp patches
Professional Replastering
Once the membrane system had been installed, the wall was professionally replastered to provide a smooth finish ready for painting or decorating.
The completed repair blends neatly with the surrounding wall while providing permanent protection behind the surface.
By treating the cause of the problem rather than simply covering it up, the homeowner can redecorate with confidence knowing the damp issue has been properly resolved.
Why Use a Mesh Membrane System?
Traditional replastering alone will not prevent moisture from returning if damp remains within the masonry.
A cavity drainage membrane system physically separates the damp wall from the internal finish, preventing moisture transfer while allowing the structure to dry naturally.
This makes it one of the most effective long-term solutions for treating penetrating damp where internal finishes have already been affected.
Damp Proofing Specialists Across Portsmouth
Whether your property is suffering from penetrating damp, rising damp, condensation or salt contamination, Nordic Damp Proofing provides professional surveys and long-lasting remedial solutions throughout Portsmouth and the surrounding areas.
Every recommendation is based on a thorough inspection, ensuring the correct treatment is installed for each individual property.
