Damp Proofing & Moisture Remediation Suppliers in Thohoyandou

Winter damp on the Highveld is usually condensation, not rising damp — cold internal surfaces meet moisture-laden indoor air (cooking, showers, breathing) and water condenses on the wall. The fix is ventilation and a small temperature lift, not a chemical injection. A DPSA-listed specialist will rule this in or out with a moisture meter on arrival, which is why a proper diagnosis matters before anyone starts hacking off plaster.

Rising damp climbs up to about 1m from floor level and shows a clear tide-mark with salt efflorescence. Lateral damp follows a horizontal line where an external feature (planter, paving, abutting wall) is breaching the wall. Condensation appears highest on cold surfaces (corners, behind wardrobes) and is usually accompanied by black mould rather than salts. SANS 10400-K is the relevant standard for wall waterproofing.

Chemical DPC injection works when the diagnosis is correct and the surface is properly prepared. Failure usually traces back to a misdiagnosis (it was lateral damp or a pipe leak, not rising damp) or a brick course that wasn't fully saturated with the injection cream. DPSA contractors typically warranty their work for 10 years against recurrence — refuse a quote that won't underwrite the workmanship.

Most acrylic and polyurethane membranes need ambient temperatures above 15°C and at least 7–10 days of dry weather to cure to full strength — that's why a Cape Town survey should be booked before the May rain peak. Emergency winter remediation is possible but typically costs 30–50% more, carries a shorter warranty, and the membrane underperforms its rated life if it cured at 8°C overnight.