Project Details

Restek was contacted by the owner of this Victorian mid-terrace house to provide a solution to the problem of dampness. The damp was affecting several walls within the original ground floor addition kitchen and rear extension dining room. The dampness was caused by a combination of capillary rising damp in already saturated masonry in the base of the walls (this was due to a breakdown of the original slate damp proof course) and also a bridging of the damp proof course by the internal wall plaster. Also the original damp proof course had been installed in the wrong position in respect of the rear cavity wall extension.

Methodology

To deal with the capillary rising damp and damp course bridging problems, the contaminated wall plaster had to be removed to expose the brickwork and allowed to dry out in preparation for new waterproof render (Thoroseal PM) to be applied. The base of the original walls and rear cavity wall extension were drilled and then injected with a new generation damp proof course. This becomes water repellent after curing at the new and correct levels. The walls were then re-plastered using Thoroseal PM, incorporating a salt retardant and waterproofing additive. This was then finished with a 3mm skim coat plaster.

Results

The works were carried out immediately following the client’s builder’s stripping out phase.

This installation was finished very quickly to allow sufficient time for the new wall plaster to dry out.

Due to the short program for the project, the new kitchen base units were installed and redecorating was carried out on schedule.

Benefits

The client benefited from a 25-year insurance backed guarantee.

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