Civil Method Statement For Wet Area Water Proofing Works

Following equipment and tools may be used as required during Wet Area Water Proofing works.

• Wire Brushes
• Soft Brushes
• Air Compressor
• Empty containers / drums
• Stirrer / Rod
• Paint Brushes
• Paint rollers
• Wheel barrow
• Spatula
• Other hand tools

• Waterproof 360 PU (Liquid applied Polyurethane Waterproofing Membrane)

WATER PROOFING PROCEDURE

Storage and Handling of Materials:

• Materials shall be stored in a cool & dry place and avoid putting in direct sun light.
• Materials shall be placed in a way to avoid the direct contact with ground soil.
• Materials shall not be exposed to the fire or naked flames in any circumstances.
• Material Safety Data Sheet (MSDS) shall be followed for safety and handling recommendations.
• Material may store for 12 months from the date of manufacturing, in a fresh and dry area in unopened original packaging.
• Only a limited required quantity of Waterproof material shall be brought to the site.

Surface Preparation Before Water Proofing:

• Surface / substrate preparation is the most important for Liquid Applied Polyurethane Waterproofing membrane before application.
• The concrete surface / substrate shall be clean and free from contamination such as dust, oil, grease, organic growth and release agents etc.
• All loosely adhering particles such as rust, mortar and cement laitance shall be removed.
• The surface would be cleaned by wire/stiff brushing and finally soft brushing or compressed air.
• The surface shall be free from standing water.
• Maximum up to 5% moisture contents are acceptable in the substrate.
• Pipes/ Sleeves, conduits, drains or any other penetrations shall be in place and protected with cement sand mortar, prior to the application, chamfer shall be made on corners.
• All cracks and joints shall be sealed as per manufacturer recommendations, at least two days before application.
• The surface shall be prepared in such a way to allow mechanical key and to achieve a maximum adhesion of the coating to the substrate.
• Application of water proofing system shall be done by experienced personnel and as per manufacturer recommendations.

Prime Coating:

• The concrete age should be at least 28 days to start waterproofing.
• Brittle substrate shall be primed with Waterproof 310 PU PRIMER.
• On stable, sound and well prepared concrete surfaces, Waterproof 360 PU, diluted 5% with Xylene may be used as primer.
• Prime coat shall be applied with brush or roller in a continuous uniform coating. Allow drying time for minimum 3 hours to proceed for next coat.

Coating Application:

• Two coats of Liquid Applied Polyurethane Waterproofing membrane shall be done.
• The first coat of Liquid Applied Polyurethane Waterproofing membrane shall be applied with brushes or rollers in a continuous uniform coating.
• The theoretical film thickness shall be around 0.5mm, as per manufacturer’s recommendations.
• At least 12 but not more than 36 hours drying time shall be allowed between the coats.
• Second coat shall be applied at right angle to the first coat.
• Each layer should not be more than 0.50 mm thick.
• Waterproofing shall be extended up vertical surfaces minimum 100 mm or as indicated in the shop drawings.
• After proper curing and before installation of mortar and ceramic tiles, a 100 microns polyethylene sheet shall be placed on top of waterproofing, as per specifications.

Inspection and Testing:

Water shall be provided for flood test for minimum 24 hour for all waterproofed floor areas.

 Cleaning:

Clean all tools and equipment immediately before polymerization with Xylene.