Roof Waterproofing seals a roof with a membrane or coating so rain cannot get through, most often on flat concrete roofs, parapets and problem joins. It helps homes and buildings with damp ceilings, ponding or ageing membranes. Send one request and local waterproofing contractors come back with prices.
Describe the job once and get roof waterproofing quotes from local contractors.
Get Roofing QuotesSigns You Need Waterproofing
- Damp patches after rain. Especially under flat roofs and parapet walls.
- Ponding water. Water that lies on the roof for days after rain.
- Cracked or blistered membrane. Torch-on that has lifted at seams or edges.
- Peeling coatings. A sign the system has reached the end of its life.
What the Work Includes
- Cleaning and removing loose or failed material.
- Surface repairs, priming and screeding to fix ponding where needed.
- Applying the membrane or coating system.
- Detailing upstands, outlets and parapets.
- A final check of laps and edges.
Materials and Methods
- Torch-on membrane. Heat-applied bitumen sheets. See torch-on waterproofing.
- Liquid membrane. Brushed or rolled on, good around awkward details.
- Acrylic or bitumen coatings. Lower cost, suited to maintenance recoats.
- Polyurethane. A higher-end liquid system.
- Cementitious. Often used on concrete surfaces.
Patch or Redo?
Small failures can be patched. If the membrane is cracked, lifting or soaked across large areas, a full strip and re-waterproof usually lasts longer. For flat roofs see flat roof waterproofing.
Roof Waterproofing Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Acrylic or bitumen coating | R100 - R180 per m² |
| Cold-applied bitumen | R100 - R250 per m² |
| Liquid membrane | R150 - R350 per m² |
| Torch-on membrane | R250 - R500 per m² |
| Polyurethane | R350 - R500 per m² |
| Screed to fix ponding | R60 - R100 per m² |
| Parapet wall waterproofing | R3,000 - R8,000 |
Prices JUST UPDATED. Indicative ballpark figures in rand, rounded, based on typical South African market rates. They are not our prices or quotations, and no contractor is bound by them. Ask whether VAT is included, and check what each quotation covers, such as scaffolding, rubble removal and call-out fees.
For a fuller breakdown, see the Roof Waterproofing Cost guide.
Get prices for your roof rather than a range. Send one request, with no obligation.
Get Roofing QuotesWhat Affects the Price
- System chosen. Coatings cost less than torch-on or polyurethane. Two-layer systems roughly double the membrane cost.
- Surface condition. Repairs and priming add about R30 - R60 per m².
- Ponding. Screeding to create falls adds cost but stops water lying on the roof.
- Access. Multi-storey buildings may need scaffolding at R5,000 - R15,000.
How Getting Quotes Works
- Request. Tell us the work, your area and how to reach you. Photos help.
- Match. Your request goes to local roofing contractors suited to the job, with your permission.
- Quote. Contractors contact you, inspect if needed and give a written price.
- Compare. Check scope, materials, warranty and payment terms side by side, then hire one or nobody.
Roof Waterproofing FAQs
Which waterproofing system is right for my roof?
It depends on the surface, foot traffic and budget. Torch-on is common on flat concrete roofs, while liquid membranes handle complex details well.
Can waterproofing go over the old membrane?
Sometimes, if the old layer is well bonded. Lifted or soaked membranes should be removed first.
When is the right time to waterproof?
Dry weather is needed for most systems. Book before the rainy season where you live.
Does waterproofing fix ponding?
Not on its own. Ponding needs screed or a change in falls before the membrane goes on.
Related Services
Use Roof Repairs South Africa to send your waterproofing job once and compare what local specialists would charge.
Roof Repairs South Africa is a lead-generation and quote-comparison service. We do not carry out roofing work and we do not employ roofers. Work is quoted and carried out by independent contractors, and your agreement is with the one you choose. Get a written quotation, check insurance and workmanship warranties, and avoid paying the full amount upfront.
Roof Waterproofing. Describe what you need once and get the best quote, fast.
Get Roofing QuotesGet the Best Quote, Fast
Keep it brief. Say what needs doing, where the property is and how to reach you. Your enquiry is passed only to roofing contractors suited to the job, and you decide whether to go ahead.
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