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Old 09-18-2012, 02:41 PM   #1
hobbsInVancouver
 
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charred garage rafters


Hi,

Last weekend I was up in the rafters installing an electrical outlet for an automatic garage door opener. I noticed most of the rafters and underside of the roofing planks are charred, to about a half inch depth in the worst spots. It gets pretty hot in the garage in the summer, there isn't a vent, but hot enough to scorch wood without a fire?

My question: is there any other reason besides a fire that the rafters in my garage are charred? I know the previous owner used the garage as a workroom...and only the very top of the inside of the roof is charred. The garage was built in 1962.

I plan on sistering a couple of the rafters to strengthen them to support the garage door opener, though I think they're probably fine as is. Thanks much.

c

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Old 09-18-2012, 03:15 PM   #2
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charred garage rafters


One of two things happened, There was a fire at one time in the attic or someone built that garage with recycled lumber.

No way did it get hot enough to catch on fire from just the heat in the attic.

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Old 09-18-2012, 03:24 PM   #3
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charred garage rafters


Yep, that's what I figured. Thanks much for the reply Joe. c.
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Old 09-18-2012, 05:04 PM   #4
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charred garage rafters


Quote:
Originally Posted by hobbs in vanvouver View Post

but hot enough to scorch wood without a fire?



Only if your loft-space reaches about 500 deg.F
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Old 09-18-2012, 05:10 PM   #5
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charred garage rafters


I'm in Canada...quick conversion to Celsius reveals...still not hot enough to scorch wood...
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Old 09-19-2012, 06:35 AM   #6
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charred garage rafters


Quote:
Originally Posted by hobbs in vanvouver View Post
I'm in Canada.
That explains it;I was wondering where Vanvouver was!
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Old 09-19-2012, 02:21 PM   #7
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charred garage rafters


Are you sure it is not black mold?
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Old 09-19-2012, 02:41 PM   #8
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charred garage rafters


Does it smell like char-coal?

Unless you have the extra time and money to spend to sister those joists, I would consider to exercise your time and money elsewhere. Equally, unless the joists are showing signs of fatigue and are about to collapse, I would consider doing other projects around the house.

Does it feel very moist in the area? (It is common for moisture to promote mold/mildew growth)

Do you have pictures to show us what you are seeing?

Lastly, I assume the roof is stick framed due to the age. Can this be confirmed?

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