Door waterproofing & leak repair Cape Town covers water coming in at floor level: sliding door tracks, level thresholds onto terraces, and entrances where the outside sits too close to the inside.
This is where modern architecture and Cape Town's driven rain disagree most sharply. Terraces are covered under terrace & patio waterproofing, and services 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 QuoteWhy Thresholds Leak
- Level thresholds. No step between outside and inside, so nothing holds water back.
- Blocked sliding door tracks. The track is a channel that must drain. Blocked, it fills and overflows inwards.
- Membrane terminating too low. On a terrace, the membrane stopping below the level driven rain reaches.
- No drainage channel. Nothing to intercept water before it reaches the threshold.
- Failed frame sealant. Perished seal at the frame perimeter.
- Reverse falls. External paving falling towards the door rather than away from it.
What Actually Fixes It
| Measure | Where it applies |
|---|---|
| Clear and maintain track drainage | First check on any sliding door. Often the whole problem. |
| Drainage channel outside | A slot or channel drain across the threshold, taking water away before it arrives. |
| Raise the membrane upstand | Carrying the terrace membrane up behind the frame to a workable height. |
| Correct external falls | So paving drains away from the door rather than towards it. |
| Fit or replace seals | Brush and compression seals on sliding units. |
| Add a step | Where the design allows it, the simplest and most reliable answer. |
Door Waterproofing & Leak Repair Cape Town Prices
| Job | Indicative range | What moves it |
|---|---|---|
| Resealing around openings | R120 – R280 per linear metre | Sealant type. |
| Screed to correct falls | R250 – R600 per m² | Where water is ponding. |
| New or relocated roof outlet | R1,800 – R4,500 each | Including membrane detailing. |
| Balcony or terrace membrane | R450 – R900 per m² | Excluding tiling and screed. |
| Leak trace and inspection | R750 – R2,500 | Area, access and testing time. |
| Single-defect leak repair | R800 – R5,000 | Flashing, lap or penetration. |
| Surface preparation | R20 – R100 per m² | Cleaning, crack filling, priming. |
| Call-out and assessment | R450 – R950 | Often credited against the work. |
| Crack repair | R150 – R450 per linear metre | Width, depth and reinforcement. |
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 QuotesLevel Thresholds and Local Rain
A flush threshold works where rain falls vertically and drains away. In a Cape Town winter front rain arrives horizontally, driven against the elevation, and a level threshold has nothing to resist it.
Where the architecture requires a flush transition, a drainage channel immediately outside the door is usually the only detail that holds. Sealant along the frame is not a substitute for it.
Related Services
Frequently Asked Questions
Water comes in under my sliding door in heavy rain. Why?
Usually the track drainage is blocked. A sliding door track is a channel that has to drain outwards; once it fills with dust and debris the water overflows inwards. Clearing it resolves a large share of these.
Can a level threshold be made watertight?
It can be made to work, but usually only with a drainage channel immediately outside taking water away before it reaches the door. Sealant along the frame is not a substitute in driven rain.
What should the quote specify?
The measured area, the system and product by name, the number of coats or layers, the preparation included, how upstands and outlets are detailed, access equipment, the guarantee term and the exclusions.
Do I need the leak found before the work is quoted?
If there is an active leak, yes. Water enters at one point and shows at another, so coating the stained area often misses the entry point entirely.
Is this covered by insurance?
Insurers generally cover sudden damage rather than gradual failure. A system at the end of its life is normally treated as wear and tear, and storm damage is a separate question your policy wording decides.
How many quotes should I get?
Three or more, on the same written brief. Rates vary widely because scope varies widely, and a spread of quotes shows quickly which contractor has actually inspected the job.
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