Rising damp is the most over-diagnosed and most over-charged damp problem in Cape Town, so it pays to know the real numbers. Here are 2026 prices for treating rising damp properly, the new chemical damp-proof course and the all-important re-plastering.
| Item | 2026 price | Notes |
|---|---|---|
| Chemical DPC injection only | R350 to R750 / linear m | The new barrier; doesn't include making good the wall. |
| Full treatment (injection + re-plaster) | R450 to R1,100 / linear m | The version that actually lasts. |
| Single room (indicative) | R6,000 to R15,000 | One room fully treated, including re-plaster. |
| Whole older home | R15,000 to R30,000+ | Several walls in a pre-DPC Southern Suburbs house. |
These are indicative Cape Town market ranges for 2026 to help you compare, not a quote.
The headline-cheap rising damp quote is usually injection only. But the salts already in the old plaster keep pulling moisture from the air, so the wall looks damp again within months even though the new barrier is working. The lasting fix removes the contaminated plaster and re-renders with a breathable, salt-resistant plaster, that's the price difference, and it's worth paying.
Linear metres of affected wall, the height the damp has risen (more wall to re-plaster), access and furniture, and whether external causes, high garden levels, leaking downpipes, also need fixing. A specialist quotes after measuring and metering the wall, not over the phone.
Genuine rising damp shows a clear tide-mark up to about a metre with salt deposits, on ground-floor walls. If your damp is high on the wall, in cold corners, or paired with window condensation, it may be condensation or penetrating damp, cheaper, different fixes. Don't pay for a DPC you don't need.
Expect R350 to R750 per linear metre for the chemical DPC injection alone, and R450 to R1,100 per linear metre for the full treatment including salt-plaster removal and breathable re-plastering, the version that lasts.
Yes. Injection-only is the most common reason damp 'comes back': the barrier works but the salty old plaster keeps drawing moisture. Paying for the re-plaster and the external fixes is what turns a temporary patch into a 20-year fix backed by a real guarantee.
Tell us about the problem and we'll connect you with one trusted local specialist for a free, no-obligation quote.