Roof Slab Maintenance & Waterproofing in Boardwalk Meander Estate, Pretoria

Location: Boardwalk Meander Estate, Pretoria
Service: Roof Slab Maintenance & Waterproofing

This double-storey home in Boardwalk Meander Estate combines pitched tile roofing with several flat concrete slab sections — over the main living areas, the garage, the kitchen, and a balcony housing the outdoor unit. Those flat slabs had reached the end of their waterproofing life, and the tile roof’s ridges and flashings needed attention too. Eco Seal was brought in for a full concrete slab waterproofing renewal from the slab up.

The problem holding this roof back

On inspection, the existing waterproofing across the main slab, the front-left and front-right sections, and the garage and kitchen slabs was delaminated, cracked, and pulling away at the joints. UV exposure had taken its toll — the membrane had failed and lost its protective top layer, leaving the concrete underneath exposed to the elements. In several spots the deterioration had progressed all the way through to holes in the substrate, with plumbing and fixings exposed to weather. Up on the tile roof, the ridge caps were cracked and due for a maintenance top coat, and the flashings around the parapets and valleys weren’t sealing properly, letting water track in where the roof meets the walls.

The Eco Seal solution

Eco Seal’s team worked through the property systematically, treating each slab section and the tile roof ridges as a distinct zone. As an approved SealPro applicator, Eco Seal used the ArmTec HyperFlex system for the flat slab areas and a stretch-seal membrane for the ridges and flashings:

1. Prep and prime every slab section — main roof, front-left, front-right, and the garage/kitchen area — stripping back failed membrane and preparing a clean substrate for the new system.
2. Strengthen cracks and delaminated joints with a stretch-seal membrane reinforcement before the main waterproofing layer goes down, so movement in the joints doesn’t reopen the problem.
3. Install the ArmTec waterproofing system across all slab areas, building up a reinforced, seamless membrane that renews and waterproofs the roof slab as a single monolithic layer.
4. Lift and reinstall the geyser and heat pump units where they sat directly on the slab, so the waterproofing runs continuously underneath them rather than stopping short.
5. Top-coat and reseal the tile roof ridges with a fresh UV-stable coating, and prep, prime, and waterproof the flashings with the stretch-seal system to close off the leak points where roof meets wall.
6. Colour-code the ridges and flashings on completion, tying the tile roof detailing back into the home’s existing roof colour.

The result

The flat slab sections are now covered in a single, continuous ArmTec waterproofing membrane with no more delaminated joints or exposed substrate — the geyser and heat pump sit back on a fully sealed surface. Up on the tile roof, the ridges are freshly UV-coated and the flashings are properly sealed against the parapets, closing off the paths water was finding into the structure. The whole roof system, pitched and flat alike, is now protected as one unit — combining slab waterproofing with the tile roof waterproofing we install across Pretoria.

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

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