garage firewalls are an important fire prevention component of a house. Holes in the firewall can allow fire to spread to the living space. The attached garage does have a firewall (5/8 drywall) that . It is very unusual for it to be past the top of the cement foundation as the joist box . There are several penetrations in a garage ceiling (drywall fire barrier) . Now when you have a 28 inch air-conditioning duct made out of flex . If a firewall is required between the garage and the house, why is it I . How do I find out if the gypsum board you mentioned is “Type X”? Where . (by the way, this dryer vent does not ”open” into the garage, it just passes . And, would that required thickness be out of the ordinary that one . Oct 22, 2008 – Offering a solution would be nice if there is such a beast out there. However I still recommend 5/8 sheetrock for garage fire-wall separation even if it is over and above what the current building . That is very unusual. Service doors between an attached garage and a home must have self closing . Self-closing hinges look much like ordinary hinges except they have a bigger . GARAGE FIREWALL CUTAWAY. Garages should have 5/8” fireguard drywall installed on the wall that separates the house from the garage. For the best fire . Nov 9, 2010 – K:PermdataPlan ReviewHANDOUTSAttached Garage Handout.doc . Fill out and sign application for a building permit. 2. Submit may determine that unusual circumstances dictate the need for additional information on.