Flat roof waterproofing in Johannesburg's northern suburbs
- Fixed price upfront
- Booked within 7 days
Get your starting price
Pick Waterproofing on the instant price form, choose Flat roof and your suburb.
WhatsApp us on 081 372 4079
Torch-on flat roof waterproofing is priced from R420 per m². A flat-roof section starts at R9,500 and a full flat roof at R42,000. Oaks waterproofs flat roofs in Bryanston, Sandton, Fourways, Randburg, Midrand and Rosebank, and the work carries a 5-year warranty on waterproofing.
What does flat roof waterproofing cover?
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The roof surface
Torch-on waterproofing, priced from R420 per m².
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Box gutters
Priced from R190 per m.
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Cracks and joints
Priced from R150 per m.
How much does flat roof waterproofing cost in Johannesburg?
These are Oaks' list prices for the northern suburbs, in South African rand. They are starting prices. The final price is confirmed on a free quote.
| Job | Price |
|---|---|
| Flat roof, torch-on | from R420 per m² |
| Waterproofing, flat-roof section | from R9,500 |
| Waterproofing, full flat roof | from R42,000 |
| Box gutters, per metre | from R190 |
| Crack and joint, per metre | from R150 |
| Leak repair and reseal | from R2,200 |
Our list prices are for the northern suburbs. Outside them, we confirm a price for your area.
What is included?
- 5-year warranty on waterproofing
- A fixed price upfront
- A photo report on completion
- A workmanship guarantee
Why do flat roofs leak?
A flat roof has almost no slope, so rain drains slowly and can sit in low spots. Water finds the weak points: joints, edges, and the places where the roof meets a wall, a skylight or a pipe.
Torch-on is a bitumen membrane that is heated and bonded to the roof to seal those joints and surfaces.
How many m² is my flat roof?
Multiply the length of the roof by its width. A rough number is enough for a starting price, and the form has a Not sure button. If you do not know, the free quote confirms the size.
Roof size also points to the project price. A section suits a leak in one area, and a full flat roof suits the whole surface.
What does a finished flat roof look like?
The photos below show a flat roof fully coated silver-blue with solar panels and a skylight, a grey sealed flat roof with a skylight and a foil duct beside a brick wall, and a roof drain set in the grey membrane. One photo shows a roof half coated, with the paint tin and brush still on the roof.
How do I get a flat roof waterproofing price?
- Open the instant price form and pick Waterproofing, then Flat roof.
- Give the roof size in m², or tap Not sure.
- Say whether it is leaking now.
- Choose your suburb and drop the pin on your home.
- Add your mobile number to see your starting price. A free quote confirms the final price.
Every job
- Fixed price upfront
- Booked within 7 days
- Photo report on completion
- Workmanship guarantee
- 5-year warranty on waterproofing
- 50% deposit before work starts, balance on completion
- Extra work gets a new quote
- Your quote is valid for 14 days
Flat roof waterproofing by Oaks
Questions and answers
How much does it cost to waterproof a flat roof per m²?
Torch-on flat roof waterproofing is priced from R420 per m². This is a starting price for the northern suburbs, confirmed on a free quote.
How much does a full flat roof cost?
A full flat roof is priced from R42,000. A flat-roof section is from R9,500.
What warranty do I get?
A 5-year warranty on waterproofing.
Can you just fix one leak?
Yes. Leak repair and reseal starts at R2,200.
Do you also do the box gutters?
Yes. Box gutters are priced from R190 per m.
Related pages
Ready to get a price for your flat roof?
Pick Waterproofing on the instant price form, choose Flat roof and your suburb.
Last updated: 29 October 2026
Why Choose Oaks Coatings & Finishes?
Fixed price upfront
You see a starting price first, then we confirm your price. Work that is not on your quote gets its own quote first.
Booked within 7 days
Your job is booked within 7 days.
Photo report on completion
When the job is done, you get a photo report.
Workmanship guarantee
We guarantee our workmanship.
Ready For A Price?
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Our Prices
Prices come from our own price list. You see a starting price before you commit.
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Our Promise
Booked within 7 days, a photo report when the job is done, and a workmanship guarantee.
Get your starting price
Answer a few questions and see a starting price from our price list. You do not have to accept.
Or WhatsApp us: 081 372 4079