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Johns Manville Unfaced Rolls

Features

Made Without Formaldehyde

The EPA recommends limiting your exposure to formaldehyde. Choose Certified JM Formaldehyde-free™ insulation to promote a healthier home environment

Design

Lightweight unfaced fiber glass home insulation keeps your house quiet, comfortable and energy efficient

Size

Can be cut to fit any size wall cavity

Noise Reducing

Effective in controlling unwanted noise in internal walls

Fire-Resistant

Fire-resistant and noncombustible

Vapor Control Compliant

Suitable with additional vapor retarder or where no vapor retarder required

Energy Star® rated

Energy Star® rated – when installed properly with air sealing, insulation can lower your energy bills by up to 20%

Environmentally Smart

Certified as containing a minimum of 25% recycled content

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Installation

Roll insulation can be used anywhere in your home, although they are best for covering long unobstructed areas like attics and crawl spaces. Roll insulation can be cut to fit any size cavity. When choosing roll insulation, make sure you use the most appropriate R-value. For ceiling and attic spaces, use batts of R-30 or R-38. In exterior walls R-13 to R-21 is commonly used, while in interior walls where insulation is used for sound control, R-11-13 is used most frequently.


1.  Open the packages by cutting lengthwise through the side panel. Be careful to avoid cutting the product. The insulation will quickly expand to its full volume when the bag is opened.

2.  Rolls must be measured and cut to fit into wall cavities. Cut insulation about an inch wider than the space using a sharp utility knife against a safe backstop, such as an unfinished floor or other smooth, flat surface. Always cut on the unfaced side of the batt.

3.  Cut the insulation to fit properly. Don't double it over or compress it. Compression changes the R-value of the insulation.

4.  Gently push insulation into the cavity so that it sits all the way, especially at the corner and edges. Then, fluff it to its full expansion by pulling it forward to fill the depth of the cavity. The fit should be snug.

5.  Allow friction to hold the insulation in place.

6.  Secure floor insulation with wire fasteners, sometimes called "lightning rods." Press the fasteners so they bow up gently against the subflooring without compressing it. Space the fasteners at least six inches from each end of the roll and 12" - 24" apart.

7.  When installing rolls in an unfinished attic or other large open area, simply unroll the insulation in place.

8.  Wherever there are adjacent rolls, make sure they fit snugly together.

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Specs


JM Model #
Item Description
UPCA/Barcode
R Value
Dimensions
Sq. Ft. Per Bag
Best For...



B373
R-19 Unfaced Rolls
031979638727
19
6.5" D x 15" W x 39'2" L
48.96
16" on center exterior 2 x 6 wood stud walls; or adding insulation to attics


JM Model #
Item Description
UPCA/Barcode
R Value
Dimensions
Sq. Ft. Per Bag
Best For...



B374
R-19 Unfaced Rolls
031979638734
19
6.5" D x 23" W x 39'2" L
24" on center exterior 2 x 6 wood stud walls; or adding insulation to attics


JM Model #
Item Description
UPCA/Barcode
R Value
Dimensions
Sq. Ft. Per Bag
Best For...


B390
R-30 Unfaced Rolls
031979300044
30
9.25" D x 15" W x 25' L
31.25
attics and ceilings


JM Model #
Item Description

UPCA/Barcode
R Value
Dimensions
Sq. Ft. Per Bag
Best For...


B777CT
R-6.7 Unfaced Multi-Purpose Rolls
031979897438
6.7
16" W x 48" L
5.33
variety of projects

 

* Prior to installing any product, you should check with your local building codes

 

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