Roof waterproofing near me

Brown ceiling stains, damp patches that grow after rain, blistered or peeling paint on the ceiling, water pooling on a flat roof for more than a day and lifted or cracked membrane edges around parapets and outlets. Mould and a musty smell in a top-floor room are also common. Any of these means water is already getting through.

Often, yes. If the existing membrane is sound and only the laps, flashings or outlets have failed, patching and resealing those areas is enough. If the membrane is brittle, bubbling across large areas or has been patched many times, a full strip and reseal gives a far longer lasting result. A specialist should inspect the whole roof before quoting.

Torch-on is a bitumen sheet heat-welded to the roof and suits flat concrete roofs with standing water. Acrylic and liquid membranes are painted on in layers with a reinforcing fabric and suit tiled roofs, parapets, flashings and roofs with many details. Many roofs use both: torch-on on the deck and liquid on the upstands.

Most acrylic and liquid membranes need 24 to 48 hours of dry weather to cure, with each coat needing a few hours between applications. Torch-on membranes are sealed by heat and can take rain almost immediately once the laps are done. Plan the work for a clear weather window and ask the specialist to check the forecast.

Roof waterproofing in South Africa is usually priced per square metre, roughly R150 to R350 depending on the system and how much preparation is needed. Small leak repairs around a parapet or outlet often cost R1,500 to R4,000, while a full flat roof reseal can run R15,000 to R45,000. Ask for preparation, membrane and coats to be priced separately.