I have my electrical and framing inspection coming up and want to be sure I got the fireblocking down.

I used 3 inches of xps on the basement walls to get away without using any other insulation inside them. I then framed out a 2x4 wall in front of this xps insulation. I used scrap pieces of xps to cut into wedges to shim between the framing and xps to snug the loose sections of xps against the concrete.
Before I stood up up the framed walls I put 1/2 in sheetrock up. This is snug to the houses bottom plate and extends out farther that the new basement wall. (so the area behind the basement wall does not go into the floor cavities above.)

I used fire foam and sealed at least every other stud bay with the foam. Sealed all gaps behind the top plate with the foam. I also used the fire foam to seal every stud hole fdrilled for electrical runs and every hole in top plates that were drilled for electrical.

For areas over the top plate that I could not use the sheetrock (drain pipes running down behind framing)I used roxul and stuffed these top areas pretty good. I also used roxul to stuff into gaps in stud bays (behind studs in framing sections that were too large for the fire foam. They are staning off the wall by 2 inches for the drain lines).

Does this all seem ok...did I miss anything?
Thanks

 

That all sounds good! The only thing you didn't mention were vertical firestops. Some areas require interrupting the foam at least every 10 feet with a fire stop that goes all the way to the foundation wall. Did you check to see if this is required in your area?

 

No I did not go all the way to foundation every ten feet. The way I read that section was that the studs had to be tight to the foam at least every ten feet....not to the actual foundation concrete.

Can I cut a notch in the xps and fill this with roxul behind one of the original verical studs as an easy fix?

 

Yes, but I wouldn't do it unless inspector insists. From what I've read, the way you did it is often accepted.

 

If you have any soffits or ducts below the joists, they require blocking to prevent fire from jumping from wall to soffit to floor joists.