WATERPROOFING REPAIRS ON EXISTING STRUCTURES

One of the most common complaints (over 60%) in construction relates to waterproofing. There can be many reasons for this: material deterioration, improper building maintenance, incorrect technical solutions, and similar issues.

Repairing waterproofing on existing structures can involve any part of the building: roofing, wet areas (bathrooms), underground waterproofing, and more.

The complexity of the repair depends on the age of the building, accessibility to the existing waterproofing, and the condition of the waterproofing itself.

On open surfaces without complicated geometry, penetrations, or details, it is easier to identify the source of moisture or leakage. In practice, the situation is often more complex because the location inside the building where leakage appears is not necessarily where the water penetration occurs.

Therefore, the most important step before deciding on the type of material and technical solution is to precisely determine the location of the waterproofing failure.

From the perspective of inspection, accessibility, and identifying water penetration, roofing and above-ground parts of the building are simpler to repair than underground parts. In operational buildings, access to underground waterproofing is often impossible, so determining the source of water ingress is usually based on estimation.

In addition to the standard materials used in new construction (synthetic and bituminous membranes, polyurethane and polymer-cement coatings), injection resins based on epoxy, acrylic, and polyurethane are also used primarily for the repair of underground waterproofing.