A SOLUTION TO WATER INGRESS AND RISING DAMP IN CONCRETE SLAB

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8 March 2022 - 16:51, by , in Uncategorized, No comments

Remedial waterproofing solution to a damp issue in an annexe

 

Our client contacted us at Singapore Waterproofing for a remedial waterproofing solution to a water ingress problem in the annexe on their property in Brisbane.
Our inspector carried out a site inspection to identify the next step forward, which was to remove a section of the topping slab and the plastic underneath it next to 3 of the 4 walls. This was to enable access to the floor to wall joints in order to perform high-pressure leak sealing injections with hydrophilic polyurethane resin. Once completed, a reverse side waterproofing system was to be installed to the wall/floor junction and turned up the masonry wall after surface preparation.

Our onsite leak sealing specialists found rising damp through the concrete floor slab underneath the topping slab after removing a section of the topping slab. The researchers also discovered two concealed joints running through the concrete floor, which showed signs of moisture infiltration.

The topping slab covering the concrete floor had to be removed in order to treat the rising damp and joints in the floor. The joints in the floor were sealed with high-pressure leak sealing injections, creating a three-dimensional seal in the building element. The joints between the wall and the floor were sealed in the same way.

Before installing the reverse side water-borne epoxy (WBE) waterproofing system, walls and floor surfaces were ground smooth and vacuumed.

The WBE moisture barrier is susceptible to UV-light and abrasive damage caused by foot traffic and objects (including furniture) being dragged across its surface. Therefore, we suggest installing a flooring system (such as tiles or carpet) to protect the moisture barrier.

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