Building Code and Building Construction - Questions and Answers
Or when you want to know how construction is supposed to be done.

|
AskCodeMan.com
|

Custom Search

Exposed Ceiling Insulation

Exposed Ceiling Insulation

New postby mtCDCcb on Tue Mar 26, 2019 6:05 pm

I have a municipal maintenance garage with a mixed occupancy classification of S1 and B. It is going to be sprinklered and unseparated. They are proposing an unfinished ceiling with exposed batt insulation. My question is can they leave this batt insulation exposed? THanks.
mtCDCcb
 
Posts: 84
Joined: Thu May 26, 2011 11:59 am

Re: Exposed Ceiling Insulation

New postby Jerry Peck - Codeman on Tue Mar 26, 2019 8:25 pm

Faced or unfaced batts?

Faced batts typically all have warnings not to leave the facing exposed, that the facing must be in contact with gypsum board or other approved material.

Unfaced batts may have limited or reduced R-value with nothing to restrict the movement of air through the batt insulation, check with the manufacturer's installation instructions. Most codes also require the insulation to be in contact with the ceiling (or floor) unless designed not to be required to be (such as spray foam insulation). Unfaced batts also require a method of keeping the insulation up in place, and that method may need to be addressed (by you and the Fire Marshall).

Also check with the Fire Marshall as to their acceptance with regard to fire and the fiberglass insulation not being covered.
Jerry Peck - CodeMan
AskCodeMan.com
Construction Litigation Consultant - Retired
Construction and Code Consultant - Semi Retired
User avatar
Jerry Peck - Codeman
Site Admin
 
Posts: 1199
Joined: Fri Dec 12, 2008 12:06 pm


Return to Insulation and structural ventilation (crawlspaces and attics)



Who is online

Users browsing this forum: No registered users and 2 guests