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Home > Our Brands > Roxul Insulation - FAQ

Roxul Insulation - FAQ

Roxul® The Better Insulation. What it's made of makes all the difference. Roxul® The Better Insulation. What it's made of makes all the difference.

Frequently Asked Questions

What is Mineral Wool (Stone Wool) and what are its benefits?

Mineral wool (stone wool) is an environmentally friendly insulation, created using a unique combination of stone and recycled slag - a by-product of steel production that would otherwise go to landfill. Its non-directional fibre structure, consistently high R-value, and higher density give it better dimensional stability and make it an effective barrier against noise. This superior product provides many valuable feature and benefits such as:

Fire Resistant: ROXUL stone wool insulation is fire resistant and non-combustible with melting point of approx. 1177°C (2150°F). It does not contribute either to the development and spread of fire or the release of toxic gases.

Water Repellent: Our insulation repels water, so R-value is not affected. It is also completely resistant to rot, mildew, mold, and bacterial growth - contributing to a safer indoor environment in your home. ROXUL insulation is also GREENGUARD® certified, receiving the highest designation for indoor air quality.

Sound Absorbent: The unique non-directional structure of ROXUL stone wool insulation content is denser than traditional insulations. It effectively reduces airflow and sound transmissions and it's higher air flow resistivity means better sound attenuation.

Better Fit: The higher density of ROXUL insulation provides superior sag resistance and fit. Once installed, our insulation holds its shape without sagging or slumping in the wall cavity to provide continuous fire protection and thermal performance over time.

Ease of Use: Working with ROXUL insulation is a breeze. Simply cut with a serrated knife for quick and easy installation between studs, around electrical boxes, pipes, wiring, ductwork and between studs and joists with non-standard widths.

What is the difference between ROXUL COMFORTBATT® and ROXUL SAFE'n'SOUND®?

The difference between COMFORTBATT® and SAFE'n'SOUND® is density (weight) and batt size. SAFE'n'SOUND® is denser than COMFORTBATT® and is manufactured to an approximate 3 inch thickness.

Can ROXUL SAFE'n'SOUND be used for thermal applications?

SAFE'n'SOUND® is intended for acoustical and added fire resistance in interior wall applications. Interior walls have no R-value requirements so R-value information is not tracked or published for SAFE'n'SOUND®. We recommend ROXUL COMFORTBATT® to be used in applications requiring thermal value.

Will ROXUL insulation products pass building code inspections?

Yes, the insulation will pass building code inspections as ROXUL tests to CAN/ULC S-702 Standard For Mineral Fibre Thermal Insulation For Buildings and ASTM C665 Standard Specification for Mineral-Fibre Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing as required by the NBCC (National Building Code of Canada), the ICC (International Code Council) and IBC (International Building Code). In addition, there are CCMC numbers on the ROXUL COMFORTBATT® product. As a result, ROXUL has met all the criteria needed for Canadian and United States residential codes.

Can I use ROXUL COMFORTBATT® in my attic?

Yes, COMFORTBATT® is designed for your exterior walls and attics. Code requirements for attic R-value will vary from province to province, although, R-40 is quite common. To achieve R-40 in your attic using COMFORTBATT®, it is recommended to use two layers of R-22 for a total of R-44. Lay the first batt between the roof trusses, then the second layer perpendicular to the first to cover up the roof trusses.

How much clearance is needed when insulating around pot/recessed lights?

Insulating around pot lights can vary by manufacturer, as well as the type of pot light and it may be covered under your local building codes. ROXUL has no set requirements for insulating around pot lights and would always recommend following the manufacturer's recommendations and/or your local building codes.

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