Tokai sits below the forest on a mix of sandy and clay soils, with newer estate homes alongside older houses. Winter runoff off the mountainside and the Steenberg slopes loads gutters and retaining walls, and the damp valley air keeps north-facing rooms prone to condensation and mould.
Rising damp is groundwater climbing your walls because the original moisture barrier has failed or was never there. It needs a new barrier, not another coat of paint. DryCape matches Tokai homeowners with one vetted local specialist, not a queue of cold callers, for a free, no-obligation quote.
Rising damp occurs when groundwater is drawn up through the porous brick and mortar of a wall by capillary action, because the original damp-proof course (DPC) has broken down, been bridged, or, in older Cape Town homes, was never installed. It carries ground salts up with it, which is why the plaster blisters and a white crust forms.
The standard, lasting treatment is to install a new chemical DPC: the specialist drills a line of holes into the mortar course near the base of the wall and injects a water-repellent silicone cream or fluid that spreads and forms a continuous new barrier. The old salt-contaminated plaster is then hacked off above the tide-line and replaced with a breathable, salt-resistant render.
Skipping the re-plaster is the classic shortcut that makes rising damp 'come back': the wall is now protected, but the salts already in the old plaster keep drawing moisture from the air. A complete treatment addresses the barrier, the salts and the external causes (high soil levels, leaking downpipes) together.
Rising damp treatment is priced per linear metre of wall, including injection and re-plastering. It's the most involved damp treatment, so it sits at the upper end. Use these indicative Cape Town ranges to set expectations, your Tokai specialist quotes on the actual job after seeing it.
| Item | Indicative 2026 price |
|---|---|
| Chemical DPC injection only | R350 to R750 / linear m |
| Full treatment incl. re-plaster & salt removal | R450 to R1,100 / linear m |
| Single affected room (indicative) | R6,000 to R15,000 |
| Whole-home older-house treatment | R15,000 to R30,000+ |
General 2026 guidance, not a quote. More detail in our Cape Town cost guides.
A properly injected chemical damp-proof course typically lasts 20+ years and is usually guaranteed for 10 to 20 years by the installer. The barrier itself is durable; what shortens lifespan is poor installation or leaving the salt-contaminated plaster in place, so insist on the full treatment.
Not if the job is done completely. Return cases almost always trace to one of three skipped steps: the old salty plaster wasn't removed, the external cause (high ground level, broken gutter) wasn't fixed, or the injection was uneven. A thorough specialist handles all three, which is why the guarantee is meaningful.
New salt-resistant plaster needs to dry, roughly one month per coat / per 25mm of thickness as a rule of thumb, before painting with a breathable paint. Painting too soon traps residual moisture and undoes the work. Your specialist will give you a firm date for your wall.
Yes. Tokai is one of our core Southern Suburbs service areas. When you submit an enquiry we match it to a vetted specialist who works in Tokai and handles rising damp treatment, and they contact you directly with a free, no-obligation quote, you are the only homeowner they get for that enquiry.
Tell us about the problem and we'll connect you with one trusted local specialist for a free, no-obligation quote.