About Green Shield Bio-Tech | Eco-Friendly Roofing in Calgary

As Calgary’s trusted experts, we protect your home from 2,405 hours of UV, snow, and hail with eco-friendly soft washing and rejuvenation for asphalt and cedar shingles, ceramic tile roofs, siding, solar panels, and more. Our 99% bio-based asphalt rejuvenator and cedar oil treatments prevent ~3 tons of landfill waste per roof. From gutter cleaning to deck washing, we’re your one-stop shop. Get a FREE inspection and estimate with our 5-year rejuvenation warranty!

Green Shield Bio-Tech, a division of Boaz Holdings Inc., is a Calgary-based leader in bio-based roof rejuvenation. Led by David Isaak, we’re passionate about extending asphalt shingle life with eco-friendly, 99% bio-based solutions. In 2025, we’re scaling in Calgary, with plans to serve Canada by 2026.

Our mission: sustainable roof rejuvenation and advanced bio-coatings that protects your home and the planet.