Torch On Waterproofing Repairs in South Africa fix damaged bitumen membranes before water gets into the slab. Send one request and independent local waterproofing contractors reply with prices.
Describe the damage and roof size, and get torch-on repair quotes.
Get Waterproofing QuotesCommon Torch-On Problems
- Blisters. Trapped moisture or air lifts the membrane in bubbles.
- Lifted laps. Overlaps peel open and let water under.
- Split seams and cracks. Movement or age splits the membrane.
- Failed upstands. Membrane pulls away from parapets and walls.
- Bare membrane. Silver coat has worn off and the bitumen is cracking.
- Ponding. Water sits on the roof and speeds up wear.
Repair Options
- Patch repair. Damaged areas are cut out and new membrane torched over. Suits isolated damage.
- Lap and seam resealing. Open laps are heated, pressed and sealed.
- Upstand rework. New membrane strips and flashings at walls and parapets.
- Overlay. A new membrane over the old one where it is still well bonded.
- Strip and redo. Full removal when damage is widespread or the layer is wet.
- Recoat. A fresh silver or reflective coat once repairs are done.
Which option fits depends on how much of the membrane has failed and whether water is trapped below it.
Torch On Waterproofing Repairs Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Patch repair, small area | R1,500 - R6,000 |
| Reseal laps and seams | R60 - R150 per metre |
| Silver reflective recoat | R25 - R60 per m² |
| Overlay with new 4 mm membrane | R250 - R450 per m² |
| Strip old membrane | R40 - R90 per m² |
| Scaffolding or access | R5,000 - R15,000 |
Prices JUST UPDATED. Indicative ballpark figures in rand, rounded, including labour unless stated. They are not our prices or quotations, and no contractor is bound by them. Confirm VAT, access costs, the product system and what each quotation includes.
Get prices for your property rather than a range. Send one request and see who replies.
Get Waterproofing QuotesWhat Affects the Quote
- Extent of damage. A few patches costs far less than a re-roof.
- Trapped water. Wet areas must be opened and dried first.
- Upstands and outlets. Detail work takes longer than open roof.
- Access. Height and scaffolding add cost.
How a Repair Is Assessed
- Inspection. The contractor walks the roof and checks laps, upstands, outlets and finish.
- Leak tracing. Inside stains are matched to the roof above, as water can travel.
- Recommendation. Patch, overlay or full replacement, with reasons.
- Repair. Damaged areas are cut, dried, primed and re-torched.
- Recoat. A reflective coat protects the repairs.
Preparation and Disruption
- Weather. Repairs need a dry roof and dry days.
- Access. Clear a path to the roof for gas bottles and rolls.
- Disruption. Small repairs often take a day. Expect burner noise and some bitumen smell.
Questions to Ask
- Is a repair enough, or is the membrane near the end of its life?
- What causes the blisters or lifted laps?
- Will you fix ponding as part of the repair?
- Is the repair covered by a warranty?
Torch On Waterproofing Repairs FAQs
Should blisters be cut open?
Small dry blisters are often left alone. Large or soft blisters are usually cut, dried and patched.
Is patching worth it on an old roof?
If damage is local and the rest is sound, yes. If failures keep appearing, budget for an overlay or replacement.
How often should the silver coat be redone?
Every few years, or when the bitumen starts showing through.
Can I repair torch-on myself?
Small cold-applied patches can hold short term. Torching needs training and fire precautions.
Related Services
Use Waterproofing South Africa to get repair quotes and see whether contractors agree on patching or replacing.
Waterproofing South Africa is a quote and referral service. We do not carry out waterproofing work and we do not employ contractors. Work is quoted and carried out by independent local contractors, and your agreement is with the one you choose. The right system depends on an inspection and the cause of the water ingress. Ask for a written quotation, the product system and the guarantee terms before you pay a deposit.
Torch On Waterproofing Repairs. Describe what you need once and get the best quote, fast.
Get Waterproofing QuotesGet the Best Quote, Fast
Keep it brief. Say what is leaking or damp, the type of surface and your suburb. Your enquiry is passed only to contractors suited to the job, and you decide whether to go ahead.
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