Interior Damp Proofing Johannesburg

What Interior Damp Proofing Really Involves in Johannesburg

Interior damp is more than a cosmetic issue. It is a sign that moisture has already penetrated the walls, often through exterior cracks, failed damp courses, poor ventilation, or water trapped in plaster. Treating it properly means stopping the moisture at its entry point, removing contaminated materials, and installing a long-term damp barrier that keeps the wall dry from the inside out.

We assess both internal symptoms and external moisture sources to ensure your home does not experience repeat damp problems.

If the damp is rising from the ground upwards, you may need our rising damp treatment instead of or in addition to interior treatment.

Why Our Interior Damp Proofing Approach Works

Many damp problems return because only the surface is treated. Simply repainting or applying generic coatings does not stop moisture movement through the wall.

Our methods use high performance damp proof coatings, chemical injection where needed, and moisture blocking plasters that form a complete barrier. We remove weakened or salt contaminated plaster and rebuild the surface with products designed to resist Johannesburg’s humidity and summer rainfall.

This ensures lasting results, not short term patches.

For walls affected by exterior water penetration, our exterior wall waterproofing may also be required to stop moisture at the source.

Who Our Interior Damp Solutions Are Ideal For

We work with homeowners and property managers dealing with:

• Black mould forming on walls
• Damp patches that keep returning after painting
• Plaster that bubbles, softens, or crumbles
• Rooms that smell musty or feel humid
• Older buildings with poor ventilation or failing damp courses
• Apartments exposed to external wall damp or rising moisture

If your walls feel cold, damp, or show recurring marks, interior damp proofing is essential before the problem spreads.

Problems Interior Damp Causes if Left Untreated

Interior damp can spread faster than expected and affect your health, comfort, and property value. Our treatments prevent:

• Mould growth and allergens
• Peeling and blistered paint
• Salt contamination in plaster
• Wall discolouration
• Deterioration of interior finishes
• Moisture buildup that spreads to adjacent rooms

Stopping damp early protects both your home and your wellbeing.

Benefits and Outcomes of Proper Interior Damp Proofing

Once your walls are treated correctly, you can expect:

• Dry, clean, and healthy interior spaces
• Strong plaster layers that resist moisture
• Long lasting coatings that prevent mould
• Improved indoor air quality
• Reduced need for repeat painting
• A smooth, neat finish that stays dry year round

Clients notice an immediate improvement in both appearance and comfort once moisture is eliminated.

How Our Interior Damp Proofing Process Works

Our process is tailored to ensure moisture is stopped at the source and the wall is fully restored.

Full inspection to identify moisture sources
Moisture measurement and damp mapping
Removal of damaged or salt contaminated plaster
Application of damp proof barrier or chemical DPC
Replastering with damp resistant materials
Application of anti mould and waterproof coatings
Repainting and final finishing

This complete method ensures the damp does not return after treatment.

For areas receiving excess water from outside, improving water flow with stormwater drainage systems may also be necessary.

Common Questions About Interior Damp Proofing

Do you need to treat the exterior wall as well?
If the moisture comes from outside, we may treat both sides to ensure a permanent solution.

Can mould return after treatment?
Not if the moisture source is blocked. We use anti mould systems that prevent regrowth.

How long before we can repaint?
Most walls can be finished soon after treatment depending on drying conditions.

Is chemical DPC always required?
Only if rising damp is contributing to the problem. We assess this during inspection.

Will the damp come back?
Our treatments are designed for long term protection and include guaranteed results.

Take the Next Step

If your interior walls are showing damp marks, mould, or peeling paint, it is best to stop the problem before it spreads. Contact us for a free estimate and we will recommend the right damp proofing solution for your home.

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Service Areas

We provide professional flat roof waterproofing across Johannesburg, including:
Sandton, Midrand, Bryanston, Fourways, Bedfordview, Rosebank, Melrose, Hyde Park, Randburg, and surrounding suburbs.