Roxul insulation is a rock-based mineral fiber
insulation comprised of Basalt rock and Recycled Slag. Basalt is a volcanic
rock which is abundant in the earth, and slag is a by-product of the steel and
copper industry. The minerals are melted and spun into fibers.
What happens if Roxul insulation gets wet?
Roxul insulation is moisture resistant yet vapor
permeable. In the event the insulation becomes damp or wet, the insulation,
when thoroughly dried, will maintain the original performance characteristics.
Are Roxul products mold resistant?
Roxul products are inorganic which provide no food
source for mold to grow. Roxul products are tested to ASTM C1338 – Standard
Test for Determining Fungi Resistance – and pass with zero fungal growth.
Are Roxul products rodent resistant?
There is no test method to determine whether or not
any product is rodent resistant. Roxul’s reputation as a rodent resistant
insulation is mainly based on word of mouth and lack of negative feedback from
numerous customers who use our products in “cottage country”. The majority of
these applications are exposed floors, which are mainly above grade allowing
rodents easy access to the insulation. As Roxul insulation has a higher
density than other insulations and a multi-directional fiber orientation,
rodents tend to avoid burrowing and nesting in Roxul insulation.
Does Roxul make blowing wool insulation?
Roxul insulation is only manufactured in batt, board
and pipe forms.
Can Roxul soundproof my walls or ceilings?
Roxul products can help to reduce airborne sound
within your home when installed in both walls and ceilings. Possible sources
of sound transfer can occur between adjoining floors, walls, ceilings and
through electrical receptacles and furnace vents. Most sound in the home is
airborne sound generated by music, voices, ambient noise, etc. Impact sound is
the result of foot traffic or falling objects. If reducing impact sound is the
primary concern, additional measures such as the addition of resilient
channels or a sound absorbing layer between the sub floor and the joists are
recommended. If you require a specific STC (Sound Transmission Class) Rating
then you can contact us for for more information.
What is an STC Rating?
A STC (Sound Transmission Class) rating is a number
rating of an assembly’s ability to withstand airborne sound transfer at
different frequencies. Generally, a higher STC rating will block more noise
from transmitting through a partition wall or ceiling. If you require an STC
rating, please contact us.
To reduce sound transmission is it better to double up
on the Roxul Safe ‘n’ Sound or keep the air space (non-bridging gap)?
Doubling the insulation will not double the STC
value as an STC rated assembly incorporates all components of the structure
with the insulation being one component of that system. Doubling the
insulation will increase the STC rating somewhat and to determine by how much
please contact us.
Can Roxul insulation go around the pipe of a gas
fireplace where the pipe meets the exterior wall?
Although Roxul is a non-combustible material, which
has a melting point of 2150 ºF, Roxul does not have any approvals for this
application. We recommend that you contact the manufacturer and/or follow
local codes for this application.
What is the fire rating of a Roxul product?
A fire rating is determined by testing a complete
system, such as a wall with all its components, and not the insulation alone.
Roxul products are non-combustible and have an approximate melting temperature
of 2150ºF but cannot hold a fire rating by itself, as is the case with any
other insulation. If you require a specific fire rating, please contact us.
Environmental - Health & Safety
Is there any "off-gassing" from Roxul products?
No, “off-gassing” is a term that was started when
blowing agents were utilized in insulation materials and Roxul does not
incorporate blowing agents in their products. The organic binders that are
used in the manufacturing process are introduced to a high temperature curing
phase, virtually eliminating volatile components.
What is the difference between ComfortBatt® and Roxul
Safe ‘n’ Sound™?
The difference between ComfortBatt® and Roxul Safe
‘n’ Sound™ is density (weight) and batt size. Roxul Safe ‘n’ Sound™ is denser
than ComfotBatt® and is manufactured to an approximate 3 inch thickness.
Can Roxul Safe ‘n’ Sound™ be used for thermal
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 ComfortBatt® and RoxulPlus® be used in applications
requiring thermal value.
Is a vapor barrier required on all applications using
mineral wool insulation?
A vapor barrier is only required when the
application involves an exterior wall. A vapor barrier is meant to block water
vapor transfer from the warm side and condense on the cold side of the wall. A
vapor barrier is always attached to the warm side.
Will Roxul insulation products pass building code
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-Fiber
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 ComfortBatt® and Roxul Plus® products.
As a result, Roxul has met all the criteria needed for Canadian and United
States residential codes.
Can I use 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 so as to cover up the roof trusses.
How much clearance is needed when insulating around
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 manufacturers
recommendations and/or your local building codes.
What is the Specific Heat for Roxul products?
The heat capacity of Roxul products at 50ºC is
0.8kJ/kgºK (0.191 BTU/lbºF).
Will Roxul corrode metals?
No. Roxul products have been tested and conform to
the stainless steel stress corrosion specification as per the ASTM test
methods C871 and C692.