Q&A Forums

Rooftop ductwork Post New Topic | Post Reply

Author Comments
Posted: Jun 03, 2017 02:57 PM
Rooftop ductwork
I want to sprayfoam ductwork for a rooftop HVAC system. I want to use closed cell spray foam and coat it with Bayseal Bayblock II acrylic coating.

According to the International Mechanical Code, all ductwork must have a flame spread index of <25 and a smoke developed index of <50.

Does anyone have any experience with spray foam insulation on ductwork?

Can a fire lock product be applied in conjunction with the Bayblock II coating to achieve the lower fire protection numbers needed?

You need to login to reply to this topic. Please click here to login.