Roof flashing repair & waterproofing Cape Town covers the junctions where a roof meets something else: a wall, a chimney, a parapet or another roof plane. It is the single most common roof leak source.
Flashings fail because they sit exactly where two elements move independently. Roof coverings are under roof repairs, and systems under Waterproofing Cape Town.
Send the area involved and photos of the surface as it stands. That is usually enough to price it.
Get a QuoteWhere Flashings Are and Why They Fail
- Wall abutments. Where a roof meets a rising wall, including extensions joined to a house.
- Chimneys. Four sides, each needing its own detail. See chimney waterproofing.
- Parapets. Where roof and parapet meet, and the membrane upstand terminates.
- Roof plane junctions. Where two roofs of different pitch or height meet.
- Around penetrations. Vents, pipes and roof lights.
- Sealant-only detailing. Where someone has run silicone along a junction instead of fitting a flashing.
A Proper Flashing Versus a Smear of Sealant
A flashing is a physical piece let into the wall, either chased into a mortar joint or tucked under a counter-flashing, so that water running down the wall is directed out onto the roof.
Sealant run along the junction is not a flashing. It relies on adhesion to two moving surfaces and perishes with UV, which is why it splits within a season or two and why so many flashing leaks are repeat visits.
Roof Flashing Repair & Waterproofing Cape Town Prices
| Job | Indicative range | What moves it |
|---|---|---|
| Flashing replacement | R250 – R600 per linear metre | Material and detailing. |
| Resealing around openings | R120 – R280 per linear metre | Sealant type. |
| Leak trace and inspection | R750 – R2,500 | Area, access and testing time. |
| Single-defect leak repair | R800 – R5,000 | Flashing, lap or penetration. |
| Re-pointing brickwork | R180 – R400 per m² | Raking out and re-jointing. |
| Torch-on membrane, single layer | R300 – R400 per m² | Flat and low-slope roofs. |
| Call-out and assessment | R450 – R950 | Often credited against the work. |
| Access equipment | R2,500 – R15,000 | Height, duration and permits. |
| Surface preparation | R20 – R100 per m² | Cleaning, crack filling, priming. |
These are indicative market ranges, not a quotation. They are compiled from published South African waterproofing and roofing pricing to give you a starting point for budgeting. They are not the rate card of any company on this platform.
Compare quotes on the system specified, the number of coats, what preparation is included and what the guarantee covers. A rate per square metre means nothing until you know what the rate covers.
Compare quotes on what is included, not on the total alone.
Request QuotesWind-Driven Rain Makes This Worse Locally
In a Cape Town front, water is pushed sideways and upwards into the junction rather than running down it. A flashing that copes with vertical rain can leak in a north-wester.
That is why flashing leaks are so often reported as intermittent, and why the wind direction at the time is worth noting when reporting one. It tells a contractor which elevation to look at first.
Related Services
Frequently Asked Questions
What is roof flashing?
A physical strip let into the wall at a junction, directing water running down the wall out onto the roof surface. It is not the same as sealant run along the joint, which relies on adhesion and perishes.
Why does my roof only leak in certain winds?
Because driven rain is pushed sideways and upwards into a flashing or lap rather than running down it. That points at a junction detail rather than a hole, and it will not be found by inspecting on a still day.
How long does the work take?
A domestic-scale job is often two to four days including preparation and curing. Larger or multi-section work runs one to three weeks. Rain stops work entirely.
How long does waterproofing last?
A correctly installed torch-on system generally gives 10 to 15 years. Liquid acrylic runs shorter, often 5 to 8. Both assume outlets are kept clear and the surface is checked once a year.
When should waterproofing be booked in Cape Town?
Late summer or autumn. Membranes and coatings need a dry substrate and a dry curing window, and contractors fill up as soon as the first winter fronts arrive.
Can waterproofing be applied over the existing coating?
Only where the existing layer is sound, dry and compatible. Coating over a blistered or delaminating membrane traps moisture underneath and the new work fails early.
Request a Waterproofing Quote
Describe the job and get quotes back from companies in your area.
Free to use, no obligation. Your request goes to LEADERR APPROVED waterproofing companies covering your area, who quote you directly.
Client Reviews
Powered by leaderr
