FSK-25 Faced

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