R-13 FSK faced fiberglass batt insulation

Johns Manville R-13 FSK-25 faced fiberglass batts deliver dependable thermal and sound performance for framed wall, floor, and ceiling cavities. The foil-scrim-kraft facing adds vapor resistance and can be left exposed where building codes permit.

Key Features:

FSK-25 Vapor-Retarder Facing: Foil facing provides excellent vapor resistance and may be left exposed where codes permit.
Precut for Standard Cavities: Sized for 16 in on-center framing and 8-ft wall heights to speed installation.
Thermal + Acoustic Performance: Helps reduce heat transfer while also reducing sound transmission through assemblies.
Fire-Resistant Facing: Rated for Flame Spread 25 or less and Smoke Developed 50 or less (per listed product data).
Indoor Air Quality Focus: Formaldehyde-free and listed with GREENGUARD Gold/SCS indoor air quality certifications (per listed product data).

Please check the Product Data Sheet Here

Specifications Table:

Specification	Details
Brand	Johns Manville (JM)
R-Value	R-13
Insulation Type	Batt insulation
Material	Fiberglass
Facing	FSK-25 faced (foil-scrim-kraft)
Batt Width	16 in
Batt Length	96 in (8 ft)
Thickness	3 1/2 in
Coverage	117.33 sq ft per bag
Formaldehyde-Free	Yes
Fire Rating (Facing)	Flame Spread 25 or less; Smoke Developed 50 or less
Sound Control	Reduces sound transmission through wall, floor, and ceiling assemblies
Vapor Retarder	FSK-25 facing serves as a vapor retarder; may be left exposed where codes permit
Fit/Framing	Precut batts to fit standard wall cavities; designed for standard 8-ft walls with 16-in on-center stud spacing
Certifications/Programs	SCS Recycled Content certification; GREENGUARD Gold Certified (office indoor air quality); SCS Certified (home indoor air quality); ENERGY STAR Seal and Insulate partner
Master Pack Quantity	5 per master pack

Frequently Asked Questions (FAQ):

Q: What framing size does a 16 in x 96 in batt fit?
A: Its precut for 16 in on-center stud/joist cavities and 8-ft spans (96 in length).

Q: Can the foil (FSK) facing be left exposed?
A: The FSK-25 facing may be left exposed where local building codes permit, and it also functions as a vapor retarder.

Q: What is the coverage per bag?
A: This package covers 117.33 sq ft per bag.

Q: Is this insulation formaldehyde-free?
A: Yesthis Johns Manville product is listed as formaldehyde-free in the provided web product data.

Q: Where is it typically used?
A: Its intended for wall, floor, and ceiling cavity applications in wood/engineered wood/steel framing (new construction or retrofit) per the provided product descriptions.

A quiet layer of luxuryperformance wrapped in polished foil

Theres something undeniably refined about a home that feels calmtemperature steady, sound softened, comfort effortless. This FSK-faced fiberglass batt brings that elevated ease with a sleek foil finish that adds vapor resistance while supporting a cleaner, quieter interior. Use it behind walls and ceilings to create rooms that feel composed and cocooned, letting finishes and furnishings shine without drafts or noise. Its the kind of behind-the-scenes essential that makes everyday living feel intentionally luxurious.

Upgrade your build with Johns Manville R-13 FSK-faced batts for efficient comfort, sound control, and code-friendly vapor resistance.

Add a Review

Your email address will not be published. Required fields are marked *