Urethane Waterproofing
Urethane waterproofing uses flexible membranes that bridge cracks and movement in concrete and masonry. When cured, these membranes form seamless barriers that resist water intrusion and vapor diffusion. Choosing the right resin system—one-component moisture curing or two-component spray membranes—depends on project size, temperature, and substrate condition. Proper surface preparation is essential for long lasting performance.
Substrate must be clean, dry, and properly primed for optimal adhesion. For interior spaces, low odor formulations help maintain indoor air quality during cure. Exterior installations require UV-stable coatings and abrasion resistance to withstand weathering.
Installation methods include spray applied membranes and cold applied trowel coatings. Cracks, joints, and penetrations should be treated with compatible sealants and detailing to prevent edge lift. Curing conditions and ventilation influence final adhesion and durability.
Rooftop Applications
Rooftop decks face thermal cycling, standing water, and direct sun, making continuous urethane membranes an attractive option. A seamless layer reduces maintenance points where punctures or microcracks can start, protecting substrate from corrosion. Prior to application, ensure substrate flatness and proper slope toward drains. Apply primers on porous surfaces and use edge details at penetrations.
Rooftop details also require careful jointing around HVAC penetrations and parapets. Use spray membranes for large areas and prefabricated corners to ensure continuity. In high traffic zones, consider protective topcoats to extend service life.
Consider drainage and ballast strategies to prevent ponding; inspect after heavy rains. UV exposure requires stabilized topcoats to maintain color and performance. Routine inspection and timely repairs prevent costly replacements.
Exterior Wall Coatings
Exterior wall coatings using urethane membranes provide weather resistance while accommodating substrate movement. A good system forms a continuous barrier that resists rain intrusion and dampness behind cladding. Choosing a high-build urethane with UV stabilization extends colorfastness and reduces maintenance. Surface prep and sealant compatibility are critical to prevent edge peel.
Detail joints with compatible sealants and keep expansion joints clear to allow movement. Apply color topcoats that resist fading and chalking under sun exposure. Always verify substrate compatibility and bond strength before full color application. In retrofit projects, match thermal expansion properties to existing walls to avoid delamination.
Regular inspections help catch micro cracks and moisture paths early. Wash surfaces periodically to remove dirt that traps moisture. Recoat intervals depend on climate and traffic. Schedule maintenance checks after severe weather.
Bathroom and Wet Areas
Bathroom and other wet areas benefit from seamless urethane membranes that minimize grout joints and mold growth. In showers and wet rooms, uninterrupted film reduces water wicking behind tiles. Pay attention to corners, drains, and penetrations where sealant performance matters. Proper surface prep and compatible primers are essential for long service life.
Ventilation remains crucial in laundry rooms and bathrooms to control humidity. Poor air exchange accelerates mold and substrate deterioration. Plan for exhaust fans and cross-ventilation during curing. Consider moisture meters to verify dryness before coating.
Maintenance describes routine cleaning and timely topcoat renewals. In spaces near appliances, include a washing machine cleaning service for preventive moisture control. Such services help reduce residue buildup that can compromise adhesion and ventilation. Advances in self-healing and UV-stable membranes offer longer intervals between renewals.