The Atlantic Seaboard coastline below the Twelve Apostles at sunset

Waterproofing Cape Town

Most waterproofing in Cape Town fails at the details, not in the middle of the roof. We inspect before we quote, specify for the roof in front of us, and put the preparation on the quote where you can see it.

  • 18 years in trade
  • Two-year written guarantee
  • Free inspection
  • Written quote before work starts

Why Waterproofing Fails in Cape Town

Almost never in the middle of the sheet. Walk any failed roof and the field is usually intact. The water is coming in at an upstand that was terminated short, a lap that was only partially bonded, an outlet the membrane was run up to rather than into, or a penetration nobody detailed.

The local weather explains why. Roughly 70% of Cape Town rain falls between June and September, and it arrives on north-westerly cold fronts at 50 to 65kph. That is rain moving sideways, and sideways rain tests verticals. Parapets, upstands, flashings and terminations take water that vertical rain never reaches.

The summer south-easter does the preparation work. It is dry, so it causes no leaks at all, but it lifts anything poorly bonded and abrades exposed edges. Everything it loosens in December leaks in June. Which is why we would rather look at your roof in March than attend it at 9pm in July.

Leak detection comes before waterproofing, because covering an active leak traps water underneath it. And on coastal buildings the concrete comes before the membrane, because a perfect membrane on a spalling slab lifts with the slab.

How It Works

  1. 1

    Free site inspection

    We get on the roof or into the roof void and establish what is actually wrong, rather than pricing what you have already noticed.

  2. 2

    Written quote before work starts

    Preparation and substrate repair itemised separately from the waterproofing, so you can see what each part costs.

  3. 3

    Work carried out

    System specified for the roof in front of us, with every lap, upstand, outlet and penetration detailed by hand.

  4. 4

    Guarantee and follow-up

    Two-year written guarantee on our workmanship, plus a check after the first winter.

Why Choose Us

  • We inspect before we quote

    Nobody prices a roof from a photograph or a phone call. We get on the roof or into the roof void, establish what is actually wrong, and quote from that.

  • Preparation is quoted separately

    Substrate repair, falls correction and strip-off appear as their own line items. That is the part that determines whether the work lasts, and the part most quotes hide.

  • We say when repair is the cheaper answer

    Plenty of roofs quoted for replacement need a day of repairs. We tell you which yours is, including when it means a smaller invoice for us.

  • Two-year written guarantee, in writing

    Minimum two years on our workmanship, with the scope set out on the quote before you sign. We check the work again after the first winter.

Cape Town, Suburb by Suburb

Exposure is not even across this city. Bishopscourt takes considerably more rain than Sea Point. Sea Point has a chloride problem in the concrete that Constantia does not. The specification follows the conditions.

Waterproofing in Cape Town FAQs

How much does waterproofing cost in Cape Town?

It depends on the roof, the system specified, the substrate condition and access. The membrane is usually the smaller part of a quote. We inspect first and quote in writing with preparation costed separately, because that is the part that determines whether the work lasts.

Do you charge for the inspection?

No. The site inspection and the written quote are free, and there is no obligation to go ahead. Leak detection on a difficult building is quoted separately, because that is investigation work rather than a quote visit.

When is the best time of year to have waterproofing done?

March and April. Roughly 70% of Cape Town rain falls between June and September, and most waterproofing systems need a dry substrate. Repairs and emergency work happen year round, but full installations belong in the dry months.

What does the guarantee cover?

Two years minimum, in writing, on our workmanship. The scope is set out on the quote before you sign, and we come back to check the work after the first winter.

Which areas of Cape Town do you cover?

Most of the metro, from the Atlantic Seaboard through the City Bowl and southern suburbs to the West Coast. If your suburb is not listed, ask us.

My roof only leaks in a storm. Is that still worth fixing?

Yes, and it is usually a small repair at that stage. Cape Town winter rain arrives sideways at 50 to 65kph, so a fault that needs wind behind the rain to leak is often minor. It gets worse if it is left.

Free inspection, written quote, no obligation

We come out, establish what is actually wrong, and put it in writing with preparation costed separately from the waterproofing.

  • We inspect before we quote, on the roof or in the roof void
  • Preparation and substrate work itemised separately
  • Two-year written guarantee
  • A check after the first winter
068 890 3548

Request a quote

Tell us what is happening and we will arrange the inspection.

No charge for the inspection, and no obligation.

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