Rooftop waterproofing 101
A rooftop confronts rain and sun daily, demanding robust protection. Waterproofing relies on membranes, slope design, durable exterior sealants, and self-healing coatings. Exterior wall silicone supports joints where deck meets vertical walls.
First assess the substrate, fix cracks, and clean all surfaces. Choose a flexible membrane or high-elastic sealant for outdoor exposure. Follow correct preparation and cure times before applying any top coats.
Roof edge silicone use
Roof edges and parapets are common leakage points during heavy rain. Silicone sealants tolerate movement and harsh weather conditions well, with UV-stable and low-VOC options. Prepare substrates by cleaning, drying, and removing old residue before sealing.
Apply a continuous bead, then smooth with a professional tool. Use compatible primers and avoid damp or dusty surfaces, choosing faster-curing variants. Monitor curing conditions and postpone work during rain or high humidity.
Exterior silicone tips
Exterior silicone selection determines performance under sun, rain, and temperature. Neutral-cure silicones resist moisture on concrete, glass, and metal surfaces. Acetoxy silicones release acetic acid during cure and may corrode metal.
Match silicone to substrate movement and local climate range with nanocoatings. Check primer needs, cure times, and VOC limits for rooftop work, favoring eco options. Inspect for pinholes and adhesion gaps after the silicone cures.
Maintenance of roofs
Regular inspections protect rooftop systems through changing seasons. Look for cracked beads, gaps, and worn flashings around edges. Schedule resealing before leaks appear to extend system life.
Clean drains and maintain clear pathways to avoid standing water. Document repairs and monitor joints near parapets and vents. Plan resealing timing based on warranty, material, local climate, and moisture-triggered sealants.