Just wow...

[iwire]

Not quite that simple, you need to tell us how thick the drywall needs to be and/or how long you want it to last in that fire before it becomes compromised enough it would let the fire spread beyond a boundary made from the drywall.

As said the paper will burn off, the gypsum will withstand the fire for some time, how long will depend on how hot the fire is and how thick the gypsum is, for fire resistance in construction this is more for allowing occupants egress time then it is for preventing fire from consuming the structure. But it also does help slow down the consumption of the structure in hopes that either fire sprinklers have a chance to lessen the fire or the fire department gets there soon enough to start slowing the fire down. A brick, block or concrete wall will not necessarily stop fire from spreading either, but will slow down the rate that it spreads.

Wow


I will stick with there is no plastic electrical box made that will tolerate a fire longer than the thinnest drywall would.

 

[david]

Wow


I will stick with there is no plastic electrical box made that will tolerate a fire longer than the thinnest drywall would.

In the op picture is that foam installation (small round peace's) in front of the rec. and in the block wall. Would it be desirable to have a box to separate the foam from the rec.

 

[david]

In the op picture is that foam installation (small round peace's) in front of the rec. and in the block wall. Would it be desirable to have a box to separate the foam from the rec.

insulation