Spray foam is only as good as the person applying it, which is why Canada regulates the installer, not just the product. Before you hire anyone, it helps to know the three things a legitimate closed-cell job is measured against - and to ask to see them.
CAN/ULC-S705.1 and S705.2
These are the governing Canadian standards for medium-density closed-cell SPF. S705.1 covers the material - what the foam itself must be. S705.2 covers the installation - how it must be applied. A quote that references S705 is a quote from someone who knows the job has a standard; one that doesn't is worth a second look.
CUFCA quality assurance
The Certified Urethane Foam Contractors Association runs an ISO-9000-based quality-assurance program for spray foam in Canada. Under it, closed-cell must meet CAN/ULC-S705 and be applied by a certified installer who carries a photo ID renewed yearly and recertifies every five years. Open-cell (low-density) is covered by its own CAN/ULC standard. This is the paperwork that separates a trained applicator from someone who bought a rig.
The thermal barrier rule
Cured foam in occupied space has to be covered with a code-required thermal barrier (commonly drywall, or an approved coating). It's a fire-safety requirement, not an upsell - and a sign of an installer who builds to code rather than to whatever's fastest.
How this applies here
Before we introduce you to an installer, we check for these credentials and confirm they're current. We don't claim the tickets ourselves - the certified installer does, and you should always be shown them, not just told about them.
Ready to move? Get a free quote from a vetted, certified installer.