Knauf R-38 Kraft Faced Fiberglass Batt Insulation 16 in x 48 in (58.67 sq-ft) - B18E

Regular price $99.80

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R-38 Kraft-Faced Fiberglass Batt Insulation

Knauf R-38 kraft-faced fiberglass batt insulation helps improve thermal performance in framed cavities while the kraft facing provides an integral vapor retarder. Sized at 16 in x 48 in, it’s designed for straightforward fit and coverage in typical residential construction applications.


Key Features:

  • High Thermal Resistance: R-38 batt helps reduce heat loss and improve energy efficiency.
  • Kraft-Faced Vapor Retarder: Integrated facing supports moisture management when installed correctly for the assembly.
  • Sized for Standard Framing: 16 in x 48 in batt dimensions suit common stud/joist spacing applications.
  • Fiberglass Batt Construction: Lightweight, compressible insulation designed to fit within cavities.
  • Jobsite Coverage Clarity: Pack covers 58.67 sq-ft for easier estimating and takeoffs.

Specifications Table:

Specification Details
Brand Knauf®
Product type / category Batt Insulation
Material Fiberglass
R-Value R-38
Facing Kraft faced
Width 16 in
Length 48 in
Coverage 58.67 sq-ft
Model / Part number B18E

Frequently Asked Questions (FAQ):

Q: What size area does this package cover?
A: One package covers 58.67 sq-ft.


Q: What does “kraft faced” mean?
A: It indicates the fiberglass batt includes a kraft paper facing that serves as an integrated vapor retarder in many wall/ceiling assemblies when installed per code and manufacturer guidance.


Q: What cavity size is this batt intended for?
A: The batt is 16 in x 48 in, commonly used to fit standard framed cavities that match the nominal width and length.


Q: Is this insulation fiberglass?
A: Yes—this is fiberglass batt insulation.


Quiet Luxury Starts Behind the Walls

True comfort is an invisible layer of luxury—and this R-38 fiberglass batt is exactly that kind of quiet upgrade. The kraft-faced finish brings a practical, built-in vapor retarder that supports the longevity of a beautifully finished space. Use it to elevate top-floor bedrooms or vaulted ceilings where warmth and hush matter most. It’s the behind-the-scenes essential that lets every surface, texture, and detail feel more refined.


Upgrade your home’s comfort and efficiency with Knauf R-38 kraft-faced fiberglass batts sized for easy coverage and dependable thermal performance.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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