Tile Roof Ridge Waterproofing in Melville

Location: Melville, Johannesburg
Service: Tile Roof Ridge Waterproofing & Maintenance

When a concrete tile roof starts leaking, the problem is almost never the tiles themselves. It is the ridges, hips and valleys where the old cement bedding has cracked, crumbled and pulled away from the tiles. In this case study, a home with a concrete tile roof had exactly that: ridge lines cracked and missing filling across large sections of the roof, blocked valleys, and loose tiles letting water track underneath. A SealPro-approved applicator was called in to strip the failed ridges back and rebuild them into a properly sealed, watertight system.

The problem

Years of sun exposure, thermal movement and weather had taken their toll on the original ridge cement. The mortar had shrunk and split, leaving open cracks running the length of the ridges and gaps where whole sections of filling had simply fallen out. Loose and broken tiles added to the risk, and the blocked valleys meant rainwater had nowhere clean to run. Left as it was, every storm would push more water into the roof structure and eventually into the ceilings below.

The solution

Working as an approved SealPro applicator, the team rebuilt the ridge lines with a full remedial system rather than a quick patch:

  1. Rake out and clean. All the loose, cracked cement was raked out of the ridges and the valleys were cleared so the substrate was sound and open.
  2. Re-bed and fill. Broken tiles were replaced or reseated, and the ridges were re-filled with a fibre-reinforced screed to restore a solid, continuous base.
  3. Prime the substrate. A penetrating primer was worked into the prepared ridge line to lock down the surface and give the waterproofing layer something to grip.
  4. Waterproof with the StretchSeal system. A flexible membrane was reinforced over the ridge joints and coated with the StretchSeal waterproofing system, creating a seamless, elastic skin that moves with the roof instead of cracking against it.
  5. Colour code the ridges. Finally, the finished ridges were colour coded to blend cleanly with the existing tile, so the repair looks like part of the roof, not a scar across it.

The result

The roof now has crisp, uniform ridge lines that are fully sealed from end to end. The cracks and open gaps are gone, the valleys drain freely, and the flexible StretchSeal coating flexes with the daily heat-and-cool cycle instead of splitting apart. The homeowner gets a watertight roof and years of protection, without the cost and disruption of replacing tiles that were never really the problem.

Prime Seal Spray is an approved SealPro applicator serving Melville and the greater Johannesburg North area. If your tile roof has cracked ridges, blocked valleys or signs of water tracking under the tiles, the same remedial system can restore it to a fully sealed, watertight finish.

Related Prime Seal Spray services: roof waterproofing · roof painting · waterproofing & painting across Johannesburg North.

Contact Prime Seal Spray for a free inspection and quote: 064 879 3553 · primesealspray.co.za

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