Closed-Cell Spray Foam Roofing in Kelowna & the Okanagan

Okanagan Insulation Services now offers closed-cell spray foam roofing for suitable flat and low-slope roofs. We use Elastochem Insulthane® 300R roofing foam for insulation and finish it with Henry® Pro-Grade® 988 silicone roof coating for weather and UV protection.

Spray foam follows the shape of the roof, creating continuous insulation across the surface and around roof details. Whether you’re planning new construction or considering an upgrade to an existing roof, we can review the project and recommend an appropriate approach.

Request a Roofing Foam Estimate

High R-value in a thin layer

Insulthane 300R is listed at R-6.4 per inch. At that value, 2 inches of foam provides approximately R-12.8, while 3 inches provides approximately R-19.2. This makes it an option when a project needs substantial insulation without a thick roof buildup.

The required thickness depends on the roof design and the building’s insulation requirements.

Continuous coverage across the roof

Traditional roofing insulation boards must be fitted together across the roof. Spray foam is applied in place, forming a continuous layer that can follow the surface and be worked around curbs, penetrations, and other details.

On a suitable roof assembly, the foam can be adhered without insulation fasteners passing through it. This helps reduce heat-loss paths associated with those fasteners. Roof edges, transitions, and penetrations still require careful detailing.

Insulation and weather protection working together

Once the Insulthane 300R foam is installed, we apply Henry Pro-Grade 988 silicone roof coating. The coating protects the foam from UV exposure and weather and provides the finished roof surface.

Together, the foam and coating provide an insulated roofing system with a seamless field of application. Proper drainage, substrate preparation, and detailing are essential to its performance.

	Spray foam roofing	Traditional insulated roofing
Insulation	Sprayed in place as a continuous layer	Typically installed as individual insulation boards
Roof details	Foam can be applied around curbs and penetrations	Boards must be cut and fitted around details
Fasteners	May be installed without fasteners through the insulation, depending on the assembly	Some systems use fasteners that pass through insulation layers
Weather protection	Requires a protective roof coating, such as Henry Pro-Grade 988	Uses a separate roofing membrane or other finished roof covering
Existing roofs	May be applied over some suitable existing roofs after preparation	Depending on the system and roof condition, replacement may require a tear-off

The best choice depends on the roof’s condition, drainage, use, design requirements, and budget. We can review your project and explain whether spray foam roofing offers a practical advantage.

An option for some existing roofs

Depending on the condition and type of existing roof, a spray foam system may be installed over it after the required preparation. When that is possible, the project may need less tear-off and generate less roofing waste.

We assess the existing surface, drainage, and roof details before recommending a retrofit. Some roofs will still require removal or repairs first.

Experienced insulation work, tailored to your roof

Roofing foam requires suitable installation conditions and careful application. Our team reviews the assembly, substrate, drainage, and project requirements before establishing the scope.

Okanagan Insulation Services has served Kelowna and the Okanagan since 1973. We bring that insulation experience, clear estimates, and coordination with other trades to every roofing foam project.

Have plans for a new roof or questions about an existing one? Send us the details, and we’ll discuss whether closed-cell spray foam roofing is a good fit.