Roof Slab Waterproofing in Elarduspark, Pretoria

Location: Elarduspark, Pretoria
Service: Roof slab maintenance and waterproofing (SealPro ArmTec system)

This flat concrete roof slab in Elarduspark, Pretoria had reached the end of its waterproofing life. The old membrane was cracked and delaminating, and years of harsh Highveld sun had broken down its UV protection to the point where it could no longer keep water out. The homeowner called in Eco Seal Coating Specialists for professional concrete slab waterproofing — stripping back the failed coating, reinforcing every crack and joint, and installing a full ArmTec system over the 34 m² slab.

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

The problem: delaminated waterproofing and failed UV protection

The existing waterproofing on this slab had delaminated from the substrate in several areas and cracked along its joints. UV exposure over the years had broken down the membrane’s protective layer, leaving it brittle and no longer able to flex with the concrete beneath it. Around the roof’s plumbing collars and edges, these open cracks and lifted joints were direct entry points for water. Left unaddressed, a slab in this condition lets moisture track into the ceilings and structure below.

The Eco Seal solution: the SealPro ArmTec system

Our waterproofing team worked through the proven SealPro sequence for this concrete slab:

1. Prep and prime the substrate — the full slab was cleaned and prepared, then primed to bind the concrete and ensure the new system adheres properly across every square metre.
2. Reinforce cracks and delaminated joints — every crack and failed joint was strengthened with a StretchSeal membrane, bridging the weak points before the main system went down.
3. Install the ArmTec waterproofing system — a full ArmTec membrane was applied over the entire slab, sealing the roof’s plumbing collars, edges and open field areas into one continuous, seamless waterproof layer.

The result: a fully re-waterproofed, seamless roof slab

The slab now carries a single, continuous ArmTec membrane with no exposed cracks and no delaminated joints. The reinforced system is built to flex with the concrete rather than fight it, giving this Elarduspark home reliable protection against Pretoria’s summer storms — the same waterproofing we carry out across Pretoria East, backed by our workmanship guarantee.

Contact Eco Seal for a free inspection and quote: 083 309 8164 · www.ecoseal.co.za

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