Multi-Purpose Unfaced Fiberglass Roll Insulation, 16-in x 4-ft

Unfaced fiberglass roll insulation from Johns Manville for small projects and gap-filling in attics, basements, crawlspaces, ceilings and walls. Sized for 16-in on-center framing, this formaldehyde-free roll helps improve energy efficiency and sound control.

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Key Features:

• Multi-Purpose Use: Ideal for attics, basements, crawlspaces, ceilings and walls; great for filling gaps
• Easy Fit: 16-in width sized for 16-in on-center stud spacing; simple press-in installation
• Unfaced Design: No vapor barrier—can be added over existing insulation for extra coverage
• Health & Safety: Formaldehyde-free fiberglass; GREENGUARD Gold and SCS certified for indoor air quality
• Durable Performance: Will not rot, mildew or deteriorate; noncorrosive to pipes, wiring and metal studs

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Specifications Table:

Specification	Details
Series Name	Multi-Purpose
Bag Dimensions (L x W x D)	16 x 5 x 4.5 in
Coverage Area (Sq. Feet)	5.33
Length (Feet)	4
Thickness (Inches)	2
Width (Inches)	16
Faced/Unfaced	Unfaced
Fits 2 x 4 Walls	Yes
Fits 2 x 6 Walls	No
For Use in Attics	Yes
For Use in Basements	Yes
For Use in Ceilings	Yes
For Use in Crawlspaces	Yes
For Use in Doors	No
For Use in Duct	No
For Use in Electrical	No
For Use in Floors	No
For Use in Garage Doors	No
For Use in Masonry	No
For Use in Plumbing	No
For Use in Vents	No
For Use in Walls	Yes
For Use in Windows	No
Formaldehyde Free	Yes
Framing Type	Steel studs
Insulation Type	Fiberglass
Maximum R-Value	0
Package Count	40
Package Type	Multi-pack
R-Value per Inch	0
Reflective	No
Sound Barrier	No
Stud Spacing (Inches)	16
Total Package Quantity	40
Vapor Retardant	No
CA Residents: Prop 65 Warning(s)	No
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
UNSPSC	30141500

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Frequently Asked Questions (FAQ):

Q: Can this be used with existing insulation?
A: Yes. As an unfaced roll, it can be added on top of existing insulation where no vapor barrier is needed.

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Q: What framing does it fit?
A: It’s designed for 16-in on-center stud spacing and fits 2x4 walls.

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Q: Is a vapor barrier included?
A: No. This product is unfaced and does not include a vapor barrier.

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Q: Where can I install it?
A: Suitable for attics, basements, crawlspaces, ceilings and walls; not intended for floors, doors, or windows.

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Q: Is it formaldehyde-free and certified?
A: Yes. It is formaldehyde-free and GREENGUARD Gold and SCS certified for indoor air quality.

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Quiet, Cozy Comfort in a Clean, Minimal Roll

This slim, unfaced fiberglass roll brings understated utility to spaces that crave calm and comfort. Its 16-inch width slips neatly between studs, perfect for quick upgrades without visual clutter. Layer in attics or basements to soften acoustics and stabilize temperatures, then finish with crisp drywall for a polished envelope. A small yet essential touch that elevates everyday living with efficient, healthy insulation.

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Upgrade your home’s comfort and efficiency today with this easy-fit Johns Manville multi-purpose roll insulation.