DC315 Coating
DC315 Thermal Barrier Coating — Applied Professionally in Muskoka
DC315 is a water-based intumescent coating applied directly over spray polyurethane foam insulation. It creates a thermal barrier that helps meet building code requirements for exposed spray foam — without the need for drywall in many applications.

What Is DC315
What Is DC315?
DC315 is a specially formulated intumescent coating designed for application over spray polyurethane foam (SPF) insulation. When exposed to heat, it expands to form a protective char layer — acting as a thermal barrier between the foam and the occupied space.
In most building scenarios, exposed spray foam insulation must be covered with a thermal barrier to meet code requirements. DC315 is a recognized solution that achieves this without requiring drywall or other coverings in many applications.
It's regularly used in basements, garages, crawlspaces, attics, and cottages where spray foam is exposed and a compliant thermal barrier is needed.
Why It's Used
Why Is a Thermal Barrier Required?
Building codes in most jurisdictions require spray foam insulation to be protected with a thermal barrier when it's exposed in occupied or accessible spaces. This is a fire safety requirement — not optional.
DC315 is applied as a spray-on coating directly over the foam, making it a practical solution when drywall or other physical coverings aren't ideal or feasible.
Proper application matters. Hiring a specialist ensures the coating is applied at the right thickness, with the right technique, to achieve a compliant and professional finish.
Applications
Where DC315 Is Applied
DC315 is suitable for a wide range of residential, cottage, and light commercial applications.
Basements
Garages
Crawlspaces
Cottages
New Builds
Renovation Projects
Clients
Who We Work With
Expertise
Why Use a Specialist
Helpful Resources
Do You Need DC315 Over Spray Foam in Ontario?
When is DC315 required under Ontario building code, and what happens if you skip it?
Read ArticleHow to Pass a Spray Foam Inspection in Muskoka
Common reasons spray foam inspections fail — and exactly how to fix each one.
Read ArticleDC315: What It Is, How It Works, and When You Need It
A complete breakdown of DC315 intumescent coating — the product, the process, and the standard.
Read ArticleService Areas
DC315 Application Across Muskoka & Central Ontario
Based in Muskoka, we primarily serve the region's homeowners, builders, and contractors — and travel throughout Central Ontario for suitable residential, commercial, and contractor projects.
