Q: What are the surface burning characteristics of the various JM building insulation facings?
A:
|
Facing |
ASTM E84 Flame |
ASTM E84 Smoke |
Can Be Left Exposed? |
| Unfaced |
<25 |
<50 |
Per local code official |
| Kraft |
Not Rated |
Not Rated |
NEVER |
| ComfortTherm® |
<25 |
<50 |
Per local code official |
| Foil |
75 |
150 |
NEVER |
| PSK |
<25 |
<50 |
Per local code official |
| FSK |
<25 |
<50 |
Per local code official |
| Coated Black |
<25 |
<50 |
Per local code official |
| Black |
<25 |
<50 |
Per local code official |
| Theatre-SHIELD™ Plus |
<25 |
<50 |
Per local code official |
Local building code officials typically have the final say in approving the use of various products for exposed applications, but they commonly accept products with an ASTM E 84 rating of 25/50. Unfaced fiber glass products are rated as noncombustible per ASTM E 136.
Can Johns Manville's ComfortTherm® insulation be left exposed?
