Concrete Roof Slab Waterproofing in Meyerton

Location: Meyerton, Gauteng
Service: Concrete Roof Slab Waterproofing (ArmTec HyperFlex System)

Flat concrete roof slabs are common on homes, blocks of flats and commercial buildings around Meyerton, and every one of them eventually reaches the end of its waterproofing life. In this case study, the roof slab had cracked along shrinkage joints, the surface coating had delaminated and worn away, and the building below was no longer protected from water. The owner brought in SealAll Roof Contractors to strip the roof back, repair every movement point and install a full reinforced waterproofing membrane over the entire slab.

As an approved SealPro applicator, SealAll Roof Contractors installs the complete SealPro ArmTec HyperFlex waterproofing system — the correct primer, crack reinforcement, embedded mesh and topcoat, applied in the correct sequence, so the finished membrane bridges movement instead of splitting open again.

The problem: a cracked, delaminated concrete roof slab

Flat concrete roofs live or die on their ability to move without cracking. On slabs like this one, the concrete opens up along shrinkage cracks and construction joints over time, and the original surface coating delaminates and weathers away. Debris and standing water collect on the roof, and every crack becomes a direct path for water into the ceilings and structure below. Left untreated, a failed slab leads to damp, spalling concrete, rusting reinforcement and ongoing interior damage.

The solution: the SealPro ArmTec reinforced membrane system

Our waterproofing team worked through the proven SealPro ArmTec sequence for concrete slabs:

1. Clean and prepare — the full slab was cleared of debris, loose material and standing water, then cleaned back to a sound, stable surface.
2. Prime — the slab was primed with Penetrar, SealPro’s deep-penetrating primer, to bind the concrete and lock down porosity before any waterproofing layer went on.
3. Reinforce the cracks and joints — every crack, delaminated joint and movement point was treated with Flex and StretchSeal membrane, sealing and bridging the roof’s weakest points first.
4. ArmTec mesh membrane — a coat of HyperFlex was applied and ArmTec reinforcing mesh was rolled into it across the full surface, then encapsulated with a second HyperFlex coat, creating one continuous reinforced membrane that flexes with the slab instead of cracking with it.
5. Topcoat — the system was finished with HydroSeal HF waterproof topcoat, delivering a clean, seamless, UV-resistant surface across the entire roof.

The result: a fully sealed, seamless flat roof

The finished slab is now a single, continuous waterproof membrane — no exposed cracks, no open joints and a clean, uniform finish from edge to edge. The building is protected against Highveld summer storms, and the reinforced ArmTec system is built to move with the structure for the long term. Every SealAll Roof Contractors project is backed by our workmanship guarantee and a warranty certificate on completion.

SealAll Roof Contractors is an approved SealPro applicator serving Vereeniging, Meyerton and the greater Vaal region, installing genuine SealPro ArmTec waterproofing systems for concrete roof slabs, flat roofs and crack repair.

Related SealAll Roof Contractors services: concrete slab waterproofing · roof waterproofing · torch-on alternative waterproofing across the Vaal Triangle.

Contact SealAll Roof Contractors for a free inspection and quote: 072 694 9243 · roofcontractors.co.za

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