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Professional Damp Proofing Services in Randburg & Johannesburg

DON’T WAIT – Damp Problems Get Worse and More Expensive Every Week.

Damp King specialises in permanent damp proofing solutions for rising damp and lateral damp. With 30+ years of experience and a 15-year written guarantee, we solve damp problems that other companies can’t fix.

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  • FREE on-site damp assessment
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  • 15-year written guarantee
If you own property in Randburg, you’ve likely noticed how our weather patterns create ideal conditions for damp problems. The summer rains, combined with the area’s clay-heavy soil, mean water doesn’t drain away as quickly as it should. That moisture finds its way into walls, and before you know it, you’re dealing with peeling paint, crumbling plaster, or that distinctive musty smell that never quite goes away.
 
I’ve been working with damp proofing in Randburg and the surrounding areas since 1994, and I’ve seen how quickly a small patch of dampness can turn into a major headache. What starts as a dark stain near the skirting board can become structural damage, costing thousands to repair. The frustrating part? Most people don’t realise they have a problem until the damage is already visible.
 
Wall damp proofing in Randburg is more than just fixing what you see on the surface. The real solution is to find out where the moisture is coming from and stop it at the source. We use moisture meters and thermal imaging cameras to pinpoint the problem, whether it’s rising damp from the ground, moisture from retaining walls, or water getting in because of poor drainage. After that, we use the right treatment for your situation, like chemical DPC injection, tanking, or drainage solutions.
The best part is that when damp proofing is done right, it lasts for years. We offer a 10-year guarantee on our work because we trust our methods.
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Professional Damp Proofing Services

Rising Damp Treatment

Professional treatment for rising damp using chemical injection and specialised plastering. 15-year guarantee.

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Lateral Damp Solutions

Expert solutions for walls affected by external moisture and soil retention. Complete waterproofing systems.

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Professional Equipment

Electronic moisture meters and thermal imaging cameras for accurate diagnosis and effective treatment.

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rising damp
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Rising Damp Treatment in Randburg

Rising damp happens when moisture from the ground moves up through your walls by capillary action. In Randburg, this is particularly common in older properties where the original damp-proof course has failed or was never installed properly. You’ll typically notice it as a tide mark on your walls, usually up to a metre high, with paint bubbling or plaster crumbling away.
We begin each job by carefully assessing the area with electronic moisture meters and thermal imaging cameras. This is not guesswork; we need to determine exactly how far the damp has spread and inspect for any underlying issues. Once we understand the problem, we remove the damaged plaster down to the bare brick, inject a chemical damp-proof course using specialised equipment, apply a latex slurry to the exposed wall, and then replaster with damp-proof plaster to keep moisture out.
 
The chemical injection creates a new barrier that stops ground moisture from rising through your walls. It’s permanent when done correctly, which is why we can offer a 10-year guarantee on the work.
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Lateral Damp Solutions

Lateral damp works differently. It happens when a wall holds back soil, such as in a retaining or basement wall, and moisture pushes in from the side instead of coming up from the ground. Homes in Sandton and Midrand with sloped gardens often face this problem, especially when the garden is higher than the floor inside.
 
The treatment process is similar to rising damp, but the diagnosis is different. We need to determine whether the problem is solely due to moisture penetration or if there’s actually water pressure building up behind the wall. Sometimes the issue is a combination of poor drainage and failed waterproofing. (Top five causes of waterproofing failures, n.d.) In those cases, we address both the damp proofing and install drainage solutions to redirect water away from the structure.
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Chemical DPC Injection Process

Our chemical damp proof course injection starts by drilling holes at set intervals along the wall. We then inject a silicone-based cream or liquid, which spreads through the brickwork to create a solid moisture barrier. Getting the spacing and depth right is important. If the holes are too far apart, the barrier will have gaps. If they are too shallow, the treatment will not be effective.
 
We have been making our own damp proofing products since 1997, so we know what works best in Johannesburg. Our products are made for the local soil and moisture conditions. After the injection, we allow enough time for the treatment to cure before we replaster. Skipping this step is the main reason damp proofing can fail.
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Tanking and Damp Proof Plaster

Tanking is used when you need full waterproofing, not just moisture control. This method is often required in basements or rooms below ground, where a watertight space is created. We installed a tanking membrane on the walls and sometimes the floor to prevent water from entering.
 
Damp-proof plaster is not the same as regular plaster. It has special additives that help it resist moisture and salt damage. After we treat damp areas, we always use damp-proof plaster when replastering. If you use standard plaster on a wet wall, it will likely fail again in a few months.
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Drainage Solutions for Water Seepage

Sometimes the problem is not just damp brickwork, but water accumulating where it shouldn’t. For example, water may collect against your foundations after rain or penetrate up through the floor. Homes in Roodepoort built on certain types of soil often experience this issue during the rainy season.
 
We provide drainage solutions ranging from basic surface channels to direct water away from your home to more advanced subsurface systems. If water rises through your floor, we may need to install subfloor pipes, which requires lifting the floor, adding drainage, fitting a damp-proof membrane, and re-screeding. This process is disruptive but offers the most reliable long-term solution.
 
We also install sump pumps where necessary, especially in basements where gravity drainage is not feasible.

Local Experience That Matters

We've been solving damp problems in Randburg, Sandton, Roodepoort, and Midrand since 1994. With 31 years of experience, we know how damp affects each area, whether it's the clay soils in parts of Randburg that trap moisture or the drainage issues on Sandton's hillsides. Because we understand these local challenges, we can quickly find the cause and suggest solutions that last.

Professional Assessment Tools

We do more than just check for damp. We use calibrated moisture meters to measure the moisture content in your walls. Thermal imaging cameras detect temperature changes, indicating where moisture is moving. With this technology, we find problems before you can see them. We often catch issues early and help you avoid expensive repairs.

Qualified and Accredited

We belong to the main industry bodies, and our technicians are well trained in damp proofing. We also make our own products, so we can guarantee their quality and know exactly what goes into your walls. This means we do not depend on outside suppliers or use products that are not made for South African conditions.

Results from Local Properties

Our Randburg clients often tell us two things: we arrive when we promise, and the damp stays gone. That second point is the real difference. Many contractors just cover your walls with sealant and leave. We take the time to remove damaged plaster, fix the source, and rebuild the right way. That’s how we make sure the problem doesn’t return.

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Get Your Free Roof Assessment

We offer free roof assessments in Randburg, Sandton, Roodepoort, and Midrand. If you have storm damage or want to prepare for the rainy season, we’ll check your roof, explain what needs to be done, and give you clear pricing. Costs range from R250 to R500 per square metre, depending on your roof’s type and condition. Emergency waterproofing services are available during business hours. Insurance claims assistance is included with all major repairs.

Contact Damp King today:

  • Call us for immediate assistance
  • Request a free assessment online
  • All damp proofing work comes with a 10-year guarantee

We’re based in Randburg and cover all surrounding areas. If you’ve got damp walls, peeling plaster, or that musty smell that won’t go away, we can help.

the best roofing service in Randburg

Founded in 1994 as damp proofing specialists, we’ve spent three decades solving the roof leaks, waterproofing failures, and moisture problems that keep Randburg property owners awake at night. No disappearing mid-job. No surprise costs. Just honest work that actually lasts.
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Contact info
  • Unit 38 Graphite Park, Fabriek Street, Strijdom Park, Randburg
  • 011 792 6575
  • 0861 111 958
  • quotes@dampking.co.za
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