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Waterproofing Piled Foundations

The waterproofing of concrete-piled foundations presents a problem for many waterproofing systems – particularly those based on sheet membranes. The majority of these systems cannot be used over pile heads and pile caps because they do not have the bearing capacity to support the applied load.

A diagram showing how to waterproof piled foundations.

Waterproofing Piled Foundations

Drybase Crystalline Active Slurry offers a solution to this problem. Because it penetrates into the concrete pile head or pile cap rather than forming a waterproof layer on top, the waterproofing material can support the loads from subsequently poured ground beams or foundation slabs.

An example of a typical application is shown below, however, because piled foundations vary widely in their configuration it is strongly recommended that our technical department are consulted early in the design process. To contact our technical department, please call 01403 210204 or submit an enquiry.

Example 1 – Waterproofing of Pile Head and Ground Beam

The schematic of a pile head ground beam.
  1. Slurry coat the piles with Drybase Crystalline Active Slurry. 1.5 kg/m2 applied in two coats.
  2. Dry sprinkle Drybase Crystalline Active Slurry at the rate of 1.2 kg/m2 to the blinding concrete prior to the concrete pour.
  3. Apply Drybase Quellmax Plus Waterbar circular around the piles in the middle of the slab.
  4. After pouring the concrete slab dry sprinkle Drybase Crystalline Active Slurry at the rate of 1.2 kg/m2 on top of the raft foundation when the concrete reaches initial set. Trowel in until coverage is uniform and the specific finish is achieved. Alternatively slurry coat the horizontal surface with Drybase Crystalline Active Slurry 1.2 kg/m2 in one coat.

Get it Done

Drybase Crystalline Active Slurry 25kg bag
Drybase Crystalline Active Slurry (25Kg)A cementitious, ready mixed in-depth waterproofer for concrete surfaces only.
£75.99
£75.99
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