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Waterproofing: What Went Wrong?
Hydrostop expert Marek Mularczyk discusses a case study based on a photo of a completed waterproofing project in the latest episode of "Sanier Waterproofing Studio."
Are you considering waterproofing but unsure which materials to choose?
Together with Hydrostop expert Marek Mularczyk, we have prepared a short series on waterproofing. Here, you will find answers to essential questions:
What is waterproofing?
How to properly apply waterproofing?
Is foundation waterproofing necessary?
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Waterproofing: What Went Wrong?
At the end of this series on waterproofing and potential mistakes, we present a photo of a completed waterproofing project with one question:
Is there anything done correctly in this image?
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Only one correct element is visible in this image: the sealing tapes designed for waterproofing the construction joint are positioned along the centerline of the wall. However, neither the left tape nor the right tape has been installed correctly.
- On the left tape, the lower part appears matte, which is the section that should have been embedded in the concrete slab. This indicates that the tape was placed too high or was lifted during concreting.
- On the right tape, too much of the tape is submerged in concrete—at least twice as much should be exposed.
- Additionally, the right tape still has transport film attached, which should have been removed before concreting.
Most importantly, the two tapes have not been connected. The left tape was not welded to the right tape, meaning there is no proper waterproof seal at the junction between the bottom slab and the walls.
How Can This Be Fixed?
- The first step is to cut out and remove the incorrectly installed tapes.
- Then, an injection hose must be placed and the walls must be concreted.
- Finally, an injection sealing process is required.
This means that instead of a relatively low cost of a few dozen złoty per meter for properly installing the tapes, the cost now rises to 200-300 zł per meter for sealing through injection.
This example highlights why proper waterproofing—from planning to execution—is critical. Even the smallest mistake can lead to significant additional costs.
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Want to Learn More About Waterproofing?
Read our guides → CLICK HERE
For additional questions about waterproofing, contact our specialist at (+48) 533 343 595.
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