Questions tagged [fireblocking]

For questions dealing with building materials or materials approved for use, and installed to resist the free passage of flame to other areas of the building through concealed spaces

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Fireblocking balloon framed interior/attic walls

Small 1960 ranch, roof trusses spaced 24" with a center sloped cathedral ceiling over the living room / kitchen, giving about 2-1/2 additional feet of height at the peak. The wall at either end ...
framistat's user avatar
13 votes
3 answers
7k views

Did I Make a Major Framing Mistake?

I am an absolute ameteur trying to frame my basement remodeling project by myself and I've learned a lot since the start of this project, but I am worried the parts I didn't know are going to come ...
senfo's user avatar
  • 429
3 votes
2 answers
371 views

How do you fireblock a huge cavity in the middle of a house?

Looking for an inventive way to fireblock in an unfinished part of a basement right under an upstairs tub (regular cast iron). I won't bother with a picture because too much going on. But the "...
DMoore's user avatar
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0 votes
2 answers
117 views

Improvements to consider when opening walls during remodel of 60s home

I'm remodeling a 60s cabin home with vertical and horizontal wood board siding. While I have the walls exposed, I wonder about possible improvements I should consider while I have access to the open ...
Matthew's user avatar
  • 135
0 votes
1 answer
3k views

How can I close a gap between ceiling drywall and a furnace flue?

My gas furnace is located in my laundry/utility and is normal(~80%?) efficiency with a Type B Flue. It goes up through the drywall ceiling into my attic(1 story) and out the roof and I verified that ...
redlude97's user avatar
  • 1,695
0 votes
1 answer
381 views

Can I notch the end of a piece of fire blocking to accommodate a wire?

I'm framing a partition wall and a lowered ceiling on one side of that wall. The space above the new, lower ceiling will essentially be attic space, so the inspector said I need fire blocking in the ...
John's user avatar
  • 169
1 vote
2 answers
636 views

How to fireblock irregular shaped hole in subfloor with pipes and electrical wires?

I've created an access hole in my subfloor for a couple pipes and a few electrical wires to get down into the crawlspace. It's coming up through the floor behind a chase wall, but the space is super ...
Sarah's user avatar
  • 175
1 vote
0 answers
1k views

Fire blocking basement, regarding unfinished closet

Currently framing a completely unfinished basement, I would like to leave the closets unfinished, for space primarily and to have access to ceiling above. I have 3 closets, one leading to under the ...
Hybrid's user avatar
  • 11
2 votes
1 answer
213 views

What can be used for CPVC firestops?

What materials to people use as a firestop for where CPVC lines penetrate through the wall/fireblocking? According to the manufacturer, apparently CPVC does not play well with certain materials. &...
2 Left Thumbs's user avatar
1 vote
2 answers
8k views

Balloon frame fire blocking

I've got a two-story balloon frame house that is gutted. I have to install fire blocking between studs in the wall cavity. Do I install the fire blocking wherever there is a floor, or wherever there ...
Mattzees's user avatar
  • 143
6 votes
2 answers
2k views

Does conduit terminated in backless gang boxes defeat the purpose of fireblocking?

My understanding for an ENT conduit (other than for future flexibility) was that it was fire-rated, to reduce the spread of fire/air-flow between floors. If the conduit went through fire-blocks or ...
Slav's user avatar
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