Heat-bonded · Cement dams · Leak repair
Torch-on bitumen membranes for cement dams, canals and rigid reservoirs — bonded waterproofing where HDPE sheet lining is not the right fit.
TORCH-ON DAM LINING
Torch-on bitumen systems support waterproofing and lining work on prepared concrete, cement and selected water-retaining surfaces.
WHY IT MATTERS
Strong adhesion to prepared concrete and gunite
Effective for localized leak repair and full relines
3 mm and 4 mm membranes for depth and traffic loads
Heat-welded laps reduce seam failure risk
15–20 year typical service life on well-prepared substrates (conditions apply)
Suitable for canals, rigid tanks and cement dams
TECHNICAL DETAIL
MORE DETAIL
Earth dams with soil batters are lined with HDPE or PVC sheet geomembrane. Cement or gunite structures — including some farm dams, irrigation canals and process reservoirs — are better served by torch-on bitumen that bonds directly to the rigid surface. We inspect first and recommend the system that matches structure type, not habit.
MORE DETAIL
Torch-on work is carried out by trained technicians with fire precautions and hot-work planning around active farms and industrial yards. Surfaces are cleaned, primed and dried before membrane runs; overlaps and penetrations are torched to full bond. For roofs and foundations using the same technology, see our bitumen waterproofing service.
HOW IT WORKS
From your first enquiry to final handover, Damtech keeps the process clear, practical and hassle-free.
Tell us what you need, including dam linings, waterproofing, steel water tanks, maintenance or repair.
No obligation. No pressure.
We assess the application, site conditions and practical requirements for your project.
Thorough. Practical. Honest.
We recommend a suitable material, system and installation approach for your site.
Clear recommendations.
Our team delivers the agreed service with clear communication and practical workmanship.
On time. On standard.
OUR PROJECTS
Quality materials, expert installation and practical solutions for dam linings, waterproofing and water storage.
550 m² bitumen torch-on lining for cement / structured dam waterproofing.
Hoedspruit structured dam waterproofed with 550 m² bitumen torch-on lining for Lowveld water storage.
View project
Torch-on bitumen waterproofing for a round concrete dam with an 18 m diameter. Approximately 255 m² circular base footprint, calculated from the 18 m diameter. This is a geometric base-area estimate — not the measured installed membrane quantity. Installed membrane area is higher once walls are included — roughly +50 m² for a 2.3 m high wall all around, plus overlaps, detailing and waste.
Tzaneen round concrete dam waterproofed with torch-on bitumen — 18 m diameter, approximately 255 m² base footprint.
View project
Approximately 15,000 m²
An approximately 15,000 m² bitumen earth dam lining project in Worcester, Western Cape, for large-scale water storage.
View projectEXPLORE SERVICES
Compare all lining types on our dam linings overview.
FAQ
Often yes, after the substrate is assessed for soundness and moisture. Failed sections may be removed before new membrane is torched in place. Severely cracked structures may need structural repair first.
Large earth dams are usually lined with HDPE geomembrane. Torch-on is reserved for rigid concrete, gunite or canal surfaces where heat-bonded adhesion is required.
The same modified bitumen technology applies to flat roofs and dam walls. Our bitumen waterproofing team handles both — one point of contact for membranes on your property.
EXPLORE SERVICES
READY TO GET STARTED?
Describe your cement dam, canal or reservoir leak — we will advise on torch-on repair or reline options.