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Johns Manville Fibreglass Insulation - R40 - 48-sq. ft. - Pack of 6 - Walls and Attics

Article #54835239 Model #90007265 Format 24x48x11.25"
This item is not currently available for immediate purchase, but can be ordered by visiting the selected store.
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Description

Fibreglass insulation, 11.25 x 24 x 48 inches. Covers up to 48 square feet. Thermal resistance of R40. Insulating wool is a flexible material made of fibreglass. It is used for the insulation of walls and attics and improves energy and acoustic efficiency. This product is made in Canada with more than 45% recycled materials. Plus, it's easy to install and fire and mildew resistant.
ECOLOGO  GREENGUARD 

Ecological Attributes

This insulating product is certified ECOLOGO®. It emits fewer VOCs and formaldehyde for better air quality, reduces heat loss for energy savings, and is made from at least 45% of recycled materials to reduce the use of raw materials. The use of recycled materials decreases the environmental impacts associated with extraction of raw materials and landfilling. Moreover, by reducing the level of harmful substances in your home, you improve the quality of air and decrease the adverse impacts on human health. This product is certified by GREENGUARD, attesting that it has less of an impact on indoor air quality. The concentrations of the total volatile organic compounds (VOCs) and formaldehyde are less than 0.5 mg/m3, reducing the impact on human health in the home.

Product specifications

Component
Fiberglass
Thickness
11,25"
Width
24"
Length
48"
Area
48 sq.ft.
Type
Fiberglass insulation
Thermal Resistance
R40

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With an R value of 3.5/inch, how do you get to 40R value on 2x6 framing? 3.5R x 5.5" = 19.25R.

Asked by: rwamoore
The thickness is listed as 287mm (about 11"). That gives you 3.5R/inchx11"=about 40R.
Answered by: ILYK9z
Date published: 2021-03-01

I can't sign in. I've been sent links but I always get an error message indicating that my password or email address is incorrect.

Asked by: kelly123456
Contact customet service ....! Lol
Answered by: GarageGod
Date published: 2019-05-30

Is this product good for the ceiling of an attic. I am finishing the attic so is this the right product to install.

Asked by: Murphalla
This product causes considerable itchiness on the skin and the eyes. We needed gloves, goggles, and face mask to install this white insulation. Much worse than the pink insulation from Owens-Corning.
Answered by: DaveBAC
Date published: 2021-08-28

How many sq feet per package

Asked by: blai
There are 48 square feet per bag. 6 pieces 24" x 48" 
Answered by: Finner
Date published: 2021-06-22

How many sq ft per bundle coverage

Asked by: Robn
in the description is states 48 sqft
Answered by: gros singe
Date published: 2018-12-05

What is the STC rating for this product?

Asked by: BashirAHMed
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Johns Manville Fibreglass Insulation - R40 - 48-sq. ft. - Pack of 6 - Walls and Attics is rated 4.6 out of 5 by 7.
Rated 5 out of 5 by from I used this to insulate my cathedral ceiling and it worked great. I found that it was a very clean insulation to install. The fibres when cutting were very minimal which was a plus.
Date published: 2019-01-14
Rated 5 out of 5 by from It's insulation, what can I say? Used it to put on top of existing insualtion in my attic. No surprise it works. I ordered it online and came in to pick it up at Lowes. It was quick and efficient.
Date published: 2018-07-03
Rated 5 out of 5 by from Great stuff Great stuff! Easy to work with. The website says the package comes with 10 pieces, but it's actually only 6 pieces. This threw my planning/budget off.
Date published: 2021-07-24
Rated 2 out of 5 by from Insulation good , lowes not so much Insulation is good , lowes has it miss printed , there are 6 peices in the bag not 10 ...
Date published: 2021-09-24
Rated 5 out of 5 by from SUPERB PRODUCT! Easy to install and handle! Very effective and reasonably priced.
Date published: 2018-12-20
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