The detail determines the system.
Roofs, balconies, box gutters, showers, planters and water-retaining structures are exposed in different ways. The appropriate waterproofing solution depends on the substrate and the failure mechanism.
More than one membrane. More than one method.
Rainier currently lists multiple specialist waterproofing systems rather than a one-product approach.
4 mm torch-on
Bituminous sheet membrane used on suitable concrete roofs, slabs and related details where specified.
Polyurethane
Flexible liquid-applied waterproofing for selected exposed surfaces and detail-rich areas.
Acrylic systems
Liquid-applied systems suited to selected roofs and weather-exposed building elements.
Liquid plastic
Published as one of Rainier’s available long-lasting waterproofing technologies.
Cementitious systems
Useful for selected concrete, masonry and water-retaining applications depending on conditions.
Liquid bitumen systems
Flexible bituminous coatings for suitable waterproofing and detailing applications.
Where failure often starts.
Roof slabs
Exposed concrete roofs, upstands, penetrations, outlets and junctions.
Balconies
Waterproofing beneath finishes, at thresholds, edges and drainage points.
Gutters & valleys
Box gutters, flashings, valleys, ridges and other roof-water collection points.
Wet areas
Showers, planters and water-retaining structures where detail continuity is critical.
A good waterproofing job starts before the membrane.
Find visible damage, joints, drainage issues and previous repairs.
Clean, repair and ready the substrate for the selected system.
Treat penetrations, flashings, parapets, outlets and movement joints carefully.
Install the approved system and provide the required protective finish.