Torch On Waterproofing

Torch-on waterproofing is a premier method that employs polymer-modified bitumen membrane sheets to create an impermeable barrier against water ingress. Reinforced with tough non-woven polyester carrier sheets, it offers extreme resistance to physical tearing, structural shifts, and hydrostatic pressure, making it the industry standard for flat concrete roofs, decks, and balconies.

Our bituminous membranes are specifically selected for the South African climate, featuring Atactic Polypropylene (APP) modification. This increases the material's heat resistance up to 150�C, ensuring it does not flow or degrade under the intense Gauteng sun, while maintaining excellent cold flexibility during winter nights.

Only experienced, certified applicators should install torch-on membranes, as the safety and success of the system depend on perfect thermal fusion. Our process ensures a leak-free bond:

• 1. Preparation: Concrete surfaces are cleaned, cracks are sealed, and a high-penetration bituminous primer is applied to ensure maximum adhesion.
• 2. Alignment: Membrane rolls are laid out and aligned with a minimum 100mm side lap and 150mm end lap to eliminate water pathways.
• 3. Torching: A propane gas torch is used to heat the under-surface bitumen to its melting point while rolling the sheet forward, fuse-bonding it directly to the primed concrete.
• 4. Detailing & Testing: Upstands, outlets, and flashing are detailed carefully, followed by a seam-welding inspection and quality sign-off.