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Budget around R180 to R350 per m² for a liquid membrane and R250 to R450 per m² for torch-on in Bellville, with materials included. The price climbs if old waterproofing has to be stripped or the screed needs falls built in. Ask for the labour, materials and guarantee period on the quote.

Many older Bellville blocks have flat concrete roofs whose original waterproofing is decades old and worn through by sun and winter rain. Blocked outlets and cracked parapets add to it. A full strip and new membrane is often more cost-effective than ongoing patching.

Look for blistering, cracking or lifting membrane, ponding water that never drains, and damp patches or peeling paint on ceilings and walls below. Moss or plants growing on a flat roof are another sign. Catching it early usually means a repair rather than a full redo.

Parapets are where most flat-roof leaks start, because the membrane changes direction and the wall cap often cracks. The fix is a proper upstand on the wall, a sealed or capped top and a correctly finished joint. Patching only the roof surface will not solve it.