R-25 Unfaced Fiberglass Batt Insulation (24 in x 96 in)

Johns Manville R-25 unfaced fiberglass batts help reduce heat loss and improve comfort in attics, ceilings, floors, and basements. Pre-cut 24-in-wide batts press-fit between framing for straightforward installation and added sound control.

Key Features:

• Thermal Performance: R-25 fiberglass batt insulation helps manage heat flow for improved energy efficiency
• Unfaced Design: No vapor barrier—ideal for layering over existing insulation where allowed by code
• Sound Dampening: Helps reduce sound transmission through floor and ceiling assemblies
• Easy Fit Installation: Pre-cut 24 in x 96 in batts designed for standard 8-ft cavities and 24-in on-center spacing
• Durable & Indoor-Air Friendly: Formaldehyde-free; inorganic glass won’t rot or mildew and is noncorrosive to pipes and wiring

Please check the Product Data Sheet Here

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What areas can this batt insulation be used in?
A: It’s listed for use in attics, ceilings, floors, and basements.

Q: Does unfaced insulation include a vapor barrier?
A: No. Unfaced batts do not include a vapor barrier (vapor retardant: no).

Q: What framing spacing is this sized for?
A: The batts are 24 inches wide and intended for 24-in on-center spacing and standard 8-ft (96-in) cavities.

Q: Can it be added over existing insulation?
A: Yes—unfaced fiberglass batts can be added to existing insulation (verify local code and moisture/vapor requirements).

Q: How do you install these batts?
A: They’re designed to press-fit between studs/joists; trim as needed with a utility knife and wear appropriate PPE.

Quiet comfort, beautifully hidden.

Think of this R-25 unfaced fiberglass batt as the invisible luxury—temperature balance and hush layered into the architecture itself. The clean, unfaced profile makes it flexible, perfect for building up performance without adding visual clutter. Use it to elevate the feel of bedrooms or media spaces where calm matters most. It’s the kind of foundational upgrade that makes a home feel effortlessly refined.

Upgrade comfort and quiet with JM R-25 unfaced fiberglass batts—size your coverage and start insulating today.