1 point
Seems pointless considering the fire stop is made from something flammable.
1 point
Its purpose is to slow it down, not stop it. There would be a chimney effect where smoke rises out of the channel and fresh oxygen is allowed to come in from below. The blocks here prevent that from happening.
1 point
Oh, I’m not saying it’s not functional in stone capacity. I understand the physics and what is trying to be accomplished with it, but unless it’s done with pretty tight tolerance so any air leakage between the upper and lower spaces is as close to nil as possible, then it’s not going to be super effective.
2 points
Dude, this is standard framing that’s been done for ages and is in tons of houses in the US. It works, and it’s mandated by code for a reason.
