Blindside waterproofing membrane

The blindside thermowelded waterproofing membrane is a robust solution composed of modified bitumen and a composite reinforcement. Its surface is treated with sandblasting, while its underside is covered with a detachable silicone film. This membrane is specially designed for the vertical waterproofing of Berlin walls. To ensure complete waterproofing, the plastic film and transverse overlaps must be thermowelded, either with a propane torch or an electric hot-air torch. This system benefits from the exothermic reaction of concrete during curing, which strengthens the adhesion between the waterproofing membranes and the structural concrete through a superior chemical and mechanical bond.

Blindside liquid membrane

The blindside liquid membrane is an asphalt-based elastomeric coating designed for commercial waterproofing in applications such as deep roofs, buried roofs, raft foundations on clean slabs, Berlin walls, and complete tanking. Resistant to shotcrete applications, this liquid membrane stands out for its versatility and cold spray application, forming a durable and seamless membrane. Compatible with a wide range of surfaces, it excels in its exceptional ability to expand and contract, effectively resisting all weather conditions. Additionally, this membrane can be reinforced using a geotextile fabric, thus offering increased resistance.

Completed projects

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Leader in Building
Envelope Solutions

HIZO positions itself as a leader in the sectors of building envelope, foundation waterproofing and fireproofing, serving a diverse clientele in commercial, institutional, multi-dwelling, and residential areas.

Leveraging our advanced technical expertise, unwavering commitment to quality, and dynamic approach to innovation, our goal is to revolutionize the standards of the building envelope and insulation industry. With our three strategically located branches (Laval, South Shore of Montreal and Ottawa), we can provide comprehensive support to our clients across a broad geographic area. Our extensive network ensures optimal accessibility and responsiveness for all your projects.

Our values

Environmental Awareness




Our promise

Our commitment is to make each project a perfect example of energy efficiency, sustainability, and optimal comfort, while ensuring the complete satisfaction of our clients.


HIZO, founded by four partners each with over 20 years of experience in the insulation sector, benefits from the expertise of a robust and seasoned team. This team comprises representatives, estimators, project managers, and site personnel, all working collaboratively to provide exceptional service that exemplifies our commitment to our clients’ complete satisfaction. We are dedicated to completing your projects with precision, speed, and professionalism that distinctly stand out in our field.