An introduction to cementitious tanking slurry, its role in waterproofing, and why the source of moisture must be understood first.
Find the source of moisture
Tanking slurry is a cementitious waterproofing coating used in specified situations such as below-ground spaces. Damp can have several causes; the source of water and the suitability of the proposed system need assessment before any coating is applied.
What the material is for
Materials are selected for a particular background and purpose. A finishing coat, a backing plaster, a render and a waterproofing system do different jobs. Check compatibility with the substrate rather than treating them as interchangeable.
Preparation and application
The surface must be assessed and prepared in line with the chosen system. Thickness, mixing, timing and environmental conditions can affect the result. Follow the manufacturer’s current instructions and seek professional assessment where moisture or structural movement is involved.
What happens afterwards
Allow the applied system to cure or dry as specified before adding paint or other finishes. Check whether additional primers, protective coats or maintenance are required.
Diagnose moisture before choosing a coating
Water can enter from outside, arise from plumbing, form through condensation or appear where ground levels and ventilation create problems. A coating chosen before the cause is understood can conceal evidence without solving it.
For a proposed tanking system, ask which surfaces are included, how joints and penetrations will be treated, and what the manufacturer requires of the background and follow-on finishes. Seek an appropriate survey where the source remains uncertain.
Before you book
How do I request a quote?
Send your postcode, photographs of the whole area and close-ups of any damage. Explain what finish you want and whether other work is planned.
Will tanking slurry cure every damp wall?
No. It is a system for specific conditions. The source of moisture, substrate and detailing need assessment before any treatment is specified.
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