Sheet waterproofing 101
Sheet waterproofing relies on pre-fabricated membranes that create a continuous barrier against water intrusion. Peel-and-stick and bonded sheet types offer different installation approaches for rooftops. Thorough substrate preparation, including cleaning and level adjustments, ensures reliable adhesion.
On rooftops, choose membranes with durability against UV exposure and temperature shifts. Consider thickness and puncture resistance to withstand foot traffic and debris. Proper detailing at penetrations and seams prevents leaks and simplifies future maintenance.
Protecting exterior walls
Exterior walls require a seamless layer that accommodates irregular substrates and moisture movement. Sheet membranes paired with water vapor permeable backings help manage interior humidity. Repair cracks and clean surfaces before adhesive application to ensure bond strength.
Seal joints with compatible tapes and overlaminates to prevent weak points. For masonry surfaces, verify compatibility with silicone sealants and masonry coatings. A topcoat, such as a transparent waterproof coating, can add UV protection and simplify inspections.
Bathroom sheet sealing
Bathrooms demand movement accommodation due to thermal cycling and humidity. Install sheet membranes around showers, bathtubs, and vanities to create a continuous barrier. Use pre-fabricated corners and liquid-applied membranes for tight joints.
Select materials with high water resistance and robust vapor diffusion properties, noting waterproof paint for small touch-ups. Integrate with existing fixtures using compatible flashing and corner beads. Avoid gaps behind cabinets by routing membranes into concealed areas when possible.
Laying outdoor membranes
Outdoor installations face sun, wind, and temperature changes that stress joints. Rooftop sections require proper slope to promote drainage and prevent standing water. Flashings around penetrations must be integrated with the sheet system for long-term performance.
Regular inspections help identify uplifted seams and micro-cracks before leaks form. Clean surfaces before maintenance to preserve adhesion and extend service life. Follow safety standards and ensure ventilation when dealing with solvent-based products and painters fumes.