 Fire Safety
Many competitors argue that because cellulose insulation is made from paper, it’s naturally more flammable than other forms of insulation. In fact, cellulose fire resistant insulation is treated with all natural fire retardants, giving cellulose wall assembly an effective 1-hour fire rating.
Cellulose also meets all Federal regulations and ASTM standards for fire safety, in accordance with UL 723 and ASTM C-739-05b characteristics.
Flame Spread and Smoke Developed are two key metrics regarding how insulation will perform in a fire.
Fire Spread refers to the speed at which flames spread along the surface of the insulating material. Smoke Developed refers to the amount of smoke that is produced while the product burns. In most house fires, it’s not the flames that cause injury or death, but rather smoke inhalation. Smoke also creates confusion and can obscure fire exits.
In one study, the ratings show that cellulose fire resistant insulation outperforms the competition on these two key metrics. On smoke developed, less than 400 is a passing score. In order to pass, Open Cell Foam needs an additional component to meet the requirements, such as Ure-k, a true 15 minute thermal barrier.
| Insulation Type |
Flame Spread |
Smoke Developed |
| Celbar Fire Resistant Insulation |
15 |
0 |
| Fiberglass |
0-5 |
<50 |
| Open Cell Foam |
25 |
<450 |
Celbar fire resistant insulation has the highest Underwriters Laboratories (UL)-Rating attainable for building insulation materials. It actually creates a barrier that resists penetration by fire. A specially formulated borate compound gives Celbar fire resistant insulation a Class 1 fire rating.
Underwriters Laboratories; Reference #R-5499.
- ICBO-Approval Number 2262
- Southern Building Code-Approval Number 9566
- HUD-FHA-VA-Permits the use of in projects
they finance-based on ’s compliance with UMB-80
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