Welcome back! You are now signed in.
You have been logged out due to inactivity
Please enter the email address you used to create the account. We'll send you a link that lets you create a new password.
Please check your email. Click the link in the email to create a new password.
Success! Your password has been updated.
Success! Your password has been updated.
There are designs that require Thermafiber insulation to achieve the fire rating. Check the UL Fire Resistance Directory for the specific design requirements. In other assemblies, the Thermafiber insulation is used to increase the STC. Fiberglass insulation cannot be substituted for Thermafiber insulation.