Does mold on attic sheathing have to be removed.
Decking under attic furnace.
Decking in front of the hvac equipment must be at least 30x30 inches.
Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.
Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.
The presence of mold inside your home even if it.
Locate the rotted roof decking.
The following are attic furnace installation requirements based on 2009 irc and 2009 imc the codes refer to it as appliances in attics.
The decking material can be half inch plywood.
Attic furnace installation must comply with you local mechanical code or imc international mechanical code if such was adopted in your area.
Mcyr marcel cyr cmi july 5 2010 6 18pm 9.
Look up at the roof area.
Gain access to the attic to inspect the plywood or roof decking.
There must be a passageway at least 30 inches high and 22 inches wide and not more than 20 feet in length.
Verdict on having a furnace in the attic pros and cons.
Attic furnace passageway and service area electrical requirement.
Not only will it interfere with the efficiency ratings of your equipment but it can also cause damage to your unit that may go undiscovered for some time.
The pros and cons of placing a furnace in the attic indicate that this idea is not a good one under most circumstances.
A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic.
Attic furnace access passageway and platform.
Be sure to cut the ripped pieces to the proper length before taking them up into the attic.
However since very few attics have an opening that s wide enough to pass a full sheet of plywood through the four by eight sheets should be ripped lengthwise.
Note bad areas for removal.
I call it out when there is no decking on the passageway.