Description

Application Method

It is essential to create a sound and solid substrate to eliminate movement during the concrete pour.
Substrates must be regular and smooth with no gaps. Grout around all penetrations such as utility conduits, etc., for stability.

HORIZONTAL BLINDING

The substrate must be free of loose aggregate and sharp protrusions. Avoid curved or rounded substrates.
The surface does not need to be dry, but standing water must be removed.

VERTICAL SHEET PILING

Use concrete, plywood, insulation or other approved facing to sheet piling to provide support for the membrane.
Board systems such as timber lagging must be closely butted to provide support and not more than the recommended mm out of alignment.

MEMBRANE INSTALLATION

Place the membrane HDPE film side to the substrate with particulate layer side up, facing the concrete pour.
End laps should be staggered to avoid build-up of layers.

Accurately position succeeding sheets to overlap the previous sheet by 75 mm along the marked selvedge.
Ensure the underside of the succeeding sheet is clean, dry and free from contamination before attempting to overlap.

Ensure a continuous bond is achieved without creases and roll firmly with a heavy roller.
Any initial tack will quickly disappear.

Overlap all roll ends and cut edges by a minimum of 75 mm and ensure the area is clean and free from contamination, wiping with a damp cloth if necessary.
Remove all floating particles from the surface of the waterproofing membrane by brush.

Apply HDPE Tape by peeling off release paper and fix the adhesive on the substrate.
Roll firmly to ensure complete adhesion without creases or voids.

Peel off the other layer of release paper and apply another piece of membrane to the adhesive tape.

POURING OF CONCRETE

The concrete must be poured within the recommended days of application of the membrane.
During pouring, take care when vibrating concrete to avoid damaging the waterproofing materials.

CORNERS

Internal and external corners should be formed as shown in diagrams, returning the membrane a minimum of recommended mm and sealing with HDPE bonding tape.
Ensure the apex of the corner is covered and sealed with tape and roll firmly.
Crease and fold the membrane to ensure a close fit to the substrate profile and avoid hollows.