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Johns Manville provides the outstanding product consistency and efficient construction process required for manufactured housing projects. It's part of our goal — to make your job easier and help build your reputation as an industry leader by delivering every time.

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Manufactured Housing

FSK-25 Batts

Combining fire resistance with a vapor barrier, Johns Manville FSK-25 batts are designed with a foil facer that can be left exposed where codes permit.

Data Sheet

SDS

Product Guide

Johns Manville Formaldehyde-free™ FSK-25 thermal and acoustical fiberglass insulation is available in R-Values up to R-30, and is offered in precut batts to fit standard wall cavities. FSK-25 faced batts combine fire resistance with excellent vapor resistance, and can be used in a wide variety of wood frame, engineered wood and steel frame construction applications, including new construction and retrofit. FSK-25 batts are designed with a foil facer that can be left exposed where codes permit.

FSK Faced_Batts_Rev_White Background 190x122

Note: Color of product may differ based on the manufacturing location.

Advantages

Thermally Efficient: Effective resistance to heat transfer, with R-values up to R-30.
Formaldehyde-free: Will not off-gas formaldehyde in the indoor environment.
Sound Control: Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
Fire-Resistant: Flame Spread of 25 or less and Smoke Developed of 50 or less. Can be left exposed where building codes permit.
Resilient Inorganic Glass: No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
Superior Performance: Stable bonded glass fibers will not slump, settle or break down during normal applications.

ASTM Standards	ASTM C665	Type III, Class A, Category I
Flame Spread	ASTM E84	≤ 25
Smoke Development	ASTM E84	≤ 50
Water Vapor Permeance Facing	ASTM E96	0.05 Perms (3 ng/Pa-s-m²)
Water Vapor Sorption	ASTM C1104	5% or less by weight
Odor Emission	ASTM C1304	Pass
Corrosiveness	ASTM 665	Pass
Fungi Resistance	ASTM C1388	Pass

JM Overview Video

JM Fiberglass Video

Insulating Your Crawl Space Video

Installating in Your Attic Video

Insulating Around Objects Video

Insulating Floors or Ceilings Video

Installing Wall Insulation Video

Available Documents

Kraft Faced Fiberglass

For thermal and acoustical performance that lasts, Johns Manville Kraft-faced Formaldehyde-free™ fiberglass insulation is paper-faced to help control moisture in concealed applications.

Data Sheet

SDS

Product Guide

Johns Manville Formaldehyde-free™ Kraft-faced thermal and acoustical insulation offers R-Values up to R-49, and is offered in precut batts to fit standard wall cavities or rolls for custom installation in any size cavity. Kraft-faced insulation is ideal for moisture control in exterior walls, reduces sound transmission through walls, ceilings and floors, and can be used in a variety of wood-framed, engineered wood and steel frame construction applications, including new construction and retrofit.

Note: Color of product may differ based on the manufacturing location.

Advantages

Thermally Efficient: Effective resistance to heat transfer, with R-values up to R-49.
Formaldehyde-free: Will not off-gas formaldehyde in the indoor environment.
Sound Control: Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
Resilient Inorganic Glass: No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
Superior Performance: Stable bonded glass fibers will not slump within the wall cavity, settle or break down during normal applications.

ASTM Standards	ASTM C665	Type II, Class C, Category 1
Water Vapor Permeance Facing	ASTM E96	1.0 Perms (57 ng/Pa-s-m²)
Water Vapor Sorption	ASTM C1104	5% or less by weight
Odor Emission	ASTM C1304	Pass
Corrosiveness	ASTM 665	Pass
Fungi Resistance	ASTM C1388	Pass

Data Sheet

Kraft Faced Fiberglass Data Sheet

SDS

Kraft Faced Fiberglass SDS
Kraft Faced Fiberglass SDS (ES)

Certifications and Specifications

Fiberglass
Fiberglass Batts EDP

Installation Instructions

Fiberglass Installation Instructions
Fiberglass Installation Instructions (ES)

Literature

Product Selector Guide

Warranties

Limited Warranty

JM Fiberglass Video

JM Overview Video

Insulating Your Crawl Space Video

Installating in Your Attic Video

Insulating Around Objects Video

Insulating Floors or Ceilings Video

Installing Wall Insulation Video

Available Documents

Unfaced Fiberglass

For effective management of heat flow and unwanted noise, Johns Manville Unfaced batts and rolls provide heat control from the exterior while effectively controlling noise in interior walls.

Data Sheet

SDS

Product Guide

JM Unfaced Formaldehyde-Free Fiberglass Insulation HPD

Johns Manville Formaldehyde-free™ Unfaced thermal and acoustical insulation offers R-Values of up to R-49, and is offered in precut batts to fit standard wall cavities or rolls for custom installation in any size cavity. Unfaced insulation reduces sound transmission through walls, ceilings and floors, and can be used in a variety of wood frame, engineered wood and steel frame construction applications, including new construction and retrofit.

Advantages

Thermally Efficient: Effective resistance to heat transfer, with R-values up to R-49.
Formaldehyde-free: Will not off-gas formaldehyde in the indoor environment.
Sound Control: Reduces sound transmission through exterior and interior walls, floor and ceiling assemblies.
Fire-Resistant: Flame Spread of 25 or less and Smoke Developed of 50 or less.
Resilient Inorganic Glass: No rotting, mildew or deterioration. Also noncorrosive to pipes, wiring and metal studs.
Superior Performance: Stable bonded glass fibers will not slump within the wall cavity, settle or break down during normal applications.

ASTM Standards	ASTM C665	Type I
Flame Spread	ASTM E84	≤ 25
Smoke Development	ASTM E84	≤ 50
Water Vapor Sorption	ASTM C1104	5% or less by weight
Odor Emission	ASTM C1304	Pass
Corrosiveness	ASTM 665	Pass
Fungi Resistance	ASTM C1388	Pass
Combustion Characteristics	ASTM E136	Pass