Practical guides on cost, system life, membrane types, leaks and storm preparation, written for Johannesburg roofs.
These guides explain roof waterproofing decisions in plain language: what moves a quote, how long a system lasts, the difference between a torch-on and a liquid membrane, why a roof leaks in the rainy season, and how to prepare a roof before the storms. They are written for Johannesburg conditions.
We do not publish prices or limits we cannot source. Where a figure would matter, we explain the factors behind it, or point you to the published source.
Waterproofing is priced by area, but the area is the least interesting number in the quote. This guide explains what actually drives the price, and how to compare two quotes that look nothing alike.
There is no single answer to how long waterproofing lasts, and any contractor who quotes a number without seeing the roof is guessing. The life of a system depends on the system, the surface under it and how the roof is looked after.
These are the two systems most Johannesburg contractors discuss for a flat or low-slope roof. Neither is better in the abstract; each fits a different roof, and the difference comes down to shape, detail and how the deck behaves.
Gauteng's rainy season runs from October, and that is when roofs that were quiet all winter start to leak. This guide explains the faults that fail when it rains, and why the wet patch on the ceiling is usually not above the entry.
The dry months before the storms are the best time to look at a roof, because waterproofing needs a dry surface and because a fault found now is cheaper than one found in a downpour. This is a practical checklist.
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