Waterproofing

Waterproofing is Engineering, Not Just Painting

South Africa has one of the highest UV indexes in the world. Standard hardware-store waterproofing paint breaks down within 24 months under this radiation, leading to a cycle of constant leaking and patching. At Construction Joburg, we break this cycle.

We don't just apply product; we engineer a watertight envelope for your building using industrial-grade materials designed for the Highveld's thermal shock (hot days, freezing nights).

1. Flat Roof Specialist (The Danger Zone)

Concrete flat roofs are the most common source of leaks in commercial and modern residential buildings. Water pooling + sun exposure = rapid failure of inferior coatings.

Our Solution: Heat-Fused Bitumen Torch-On

• The Spec: We use a 4mm SABS-approved bitumen membrane, not the thin 3mm DIY versions.
• The Process: We don't just stick it on. We prime the surface with a bituminous primer for deep adhesion, then heat-fuse the membrane to the substrate, creating a seamless, rubberized skin that moves with your building.
• The Result: A system that lasts 10+ years, not 2.

2. Tiled Roof Rehabilitation

Tiles rarely leak; the structure holding them does. Thermal expansion causes the cement mortar on ridges and valleys to crack.

Our Solution: Fiber-Reinforced Systems Instead of just re-cementing (which will crack again), we apply a fiber-embedded pure acrylic membrane. This acts as a flexible bandage that stretches during thermal expansion, keeping your ridges sealed even when the building moves.

3. Diagnosis & Preparation (The 80% Rule)

Most waterproofing failures happen because the applicator didn't clean the surface.

• Moisture Mapping: We use thermal cameras and moisture meters to find the source, which is often meters away from the ceiling stain.
• Aggressive Prep: We high-pressure clean, strip old failing layers, and grind concrete where necessary. We never waterproof over dirt.

"Water is the most patient enemy your building has. It only needs a 1mm gap. We don't leave that gap."

Why Trust Us?

• Certified Applicators: Our teams are trained by the manufacturers (e.g., ABE, Sika, Derbigum).
• Flood Testing: On flat roofs, we plug the drains and flood the roof for 24 hours to prove it seals before we sign off.
• Guarantee: We offer back-to-back guarantees on product and workmanship.