Blister & Crack Repairs That Last
Common Weak Spots
Surface Cracks
Roof Blisters
Edge & Joint Damage
Leak-Proof Crack Sealing
Blister Removal & Protection
How we work
1.
Quote
2.
Fix
3.
Guarantee
Roof Types We Repair
Crack & Blister Repair Methods
Built for Johannesburg Conditions
Our results speak for themselves
What our clients are saying
"I want to publicly thank the team at ITA CORP for the extremely professional and reliable work they did recently on our patio roof. We've struggled with leaks for years, and now, with ITA CORP on the job, I feel comfortable since Malvern is conscientious, eager to help, knowledgeable, and his communication and follow-up is amazing."
"Itacorp have provided excellent services and quality workmanship throughout the years. Any comeback is dealt with immediately/timeously.
Itacorp takes pride in their workmanship. Recommended."
"Itacorp has helped me a lot with dampness walls, slabs water proofing, as well as storm water drain system that has given me years of problem. knowledge and service is out of this world, thank you Malven Makura.😀"
"I want to extend a big thank you to ITA CORP for the outstanding work they did on my house. From start to finish, their professionalism, attention to detail, and quality of workmanship were exceptional. It’s rare to find a team that delivers exactly what they promise—and they certainly did. Highly recommended for anyone looking for reliable, top-notch service!"
"I have had the pleasure of several dealings with Melvern and his professional team where the work done has always been above & beyond expectations and have no hesitation in referring his company."
"We have had serious issues with water damage that was driving us insane. Malvern’s team waterproofed our bathroom and fixed what another contractors managed to damage."
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What Professional Crack and Blister Repair Really Involves
Crack and blister repair is not a surface level patch job. These failures are symptoms of deeper roof stress caused by heat expansion, trapped moisture, ageing membranes, or structural movement. If not addressed correctly, cracks widen and blisters continue to lift, allowing water to travel beneath waterproofing layers.
Professional repair involves identifying why the crack or blister formed, removing all compromised material, and rebuilding the waterproof barrier so it can flex and seal properly. This work is a core part of our specialist roof repair services, focused on stopping leaks at the source rather than masking damage.
Why Our Crack and Blister Repairs Last
Many crack repairs fail because the underlying movement or moisture was never resolved. We approach each repair as a structural and waterproofing problem, not just a visible defect.
Cracks are opened, stabilised, reinforced, and sealed using compatible systems. Blisters are fully cut out, dried, and rebuilt using coatings designed to withstand UV exposure and heat cycling. This ensures the repaired area integrates with the rest of the roof instead of becoming a weak point again.
Who Crack and Blister Repair Is Best Suited For
Crack and blister repairs are ideal for properties showing early or recurring roof damage. This service is commonly used for:
Homes with unexplained ceiling leaks
Flat and slab roofs showing surface cracking
Older waterproofing systems with blistering
Balconies and parapet walls under constant exposure
Commercial roofs requiring targeted repairs
Early intervention prevents widespread failure and avoids the cost of full roof replacement.
Problems Crack and Blister Repair Solves
Targeted crack and blister repair stops water ingress before it spreads across the roof system. It prevents moisture from travelling under membranes, protects ceilings and walls below, and reduces structural deterioration.
In many cases, repairs are combined with broader roof waterproofing solutions to reinforce surrounding areas and extend the life of the roof. This approach significantly reduces the risk of repeat leaks.
Benefits and Long-Term Outcomes
Homeowners and property managers benefit from leak free roofs, reduced maintenance costs, and improved roof reliability. Proper repairs also delay the need for major waterproofing projects by stabilising vulnerable areas early.
Roofs remain protected against heat expansion and heavy rainfall, while UV resistant finishes help prevent new cracks and blisters from forming.
How the Crack and Blister Repair Process Works
We begin with a roof inspection to locate cracks, blisters, and moisture affected areas. Damaged sections are opened, cleaned, and dried to remove trapped water.
Cracks are reinforced and sealed, blisters are patched with compatible waterproof layers, and the area is finished with protective coatings. Where required, repairs are integrated with liquid rubber waterproofing systems to ensure flexibility and long term performance.
Common Questions About Crack and Blister Repair
Can cracks be repaired without replacing the whole roof
Yes. When caught early, targeted repairs are highly effective.
Why do roof blisters keep coming back
Blisters return when trapped moisture or heat expansion is not addressed correctly.
How long do crack repairs last
With correct preparation and materials, repairs last for many years.
Is crack repair better than re waterproofing
It depends on roof condition. Localised damage can often be repaired without full replacement.
Ready to Repair Your Roof Before Damage Spreads
If your roof is showing cracks, blisters, or early signs of leakage, prompt repair can save you significant cost and disruption. Book a roof assessment today and get expert advice on the most effective repair solution for your roof and Johannesburg’s demanding conditions.
Service Areas
We provide professional flat roof waterproofing across Johannesburg, including:
Sandton, Midrand, Bryanston, Fourways, Bedfordview, Rosebank, Melrose, Hyde Park, Randburg, and surrounding suburbs.