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post #1 of 6 Old 02-13-2012, 08:22 AM Thread Starter
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Douglas Fir

I remodel a lot of homes built from the 1940's thru 1970's and I keep finding occasions where Douglas Fir is failing. I recently had a home where the floor joists in a house were breaking when they were only spaning 6'. The fir was mixed with pine and spruce and only the Douglas Fir boards were failing. They felt as if they were is a state of dry rot. I'm beginning draw the conclusion that fir ages twice as fast as other woods. Is anyone else having this experience?
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post #2 of 6 Old 02-13-2012, 08:31 AM
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Quote:
Originally Posted by Steve Neul View Post
I remodel a lot of homes built from the 1940's thru 1970's and I keep finding occasions where Douglas Fir is failing. I recently had a home where the floor joists in a house were breaking when they were only spaning 6'. The fir was mixed with pine and spruce and only the Douglas Fir boards were failing. They felt as if they were is a state of dry rot. I'm beginning draw the conclusion that fir ages twice as fast as other woods. Is anyone else having this experience?
It's possible that it is coincidental. I haven't found that one species is more prone to failure due to age over another. The conditions at those sites or the wood used may play into the problem.




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post #3 of 6 Old 02-13-2012, 08:41 AM
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Originally Posted by Steve Neul View Post
I remodel a lot of homes built from the 1940's thru 1970's and I keep finding occasions where Douglas Fir is failing. I recently had a home where the floor joists in a house were breaking when they were only spaning 6'. The fir was mixed with pine and spruce and only the Douglas Fir boards were failing. They felt as if they were is a state of dry rot. I'm beginning draw the conclusion that fir ages twice as fast as other woods. Is anyone else having this experience?
What was the size of these joists that were breaking?

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post #4 of 6 Old 02-13-2012, 08:50 AM
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Quote:
Originally Posted by Steve Neul
I remodel a lot of homes built from the 1940's thru 1970's and I keep finding occasions where Douglas Fir is failing. I recently had a home where the floor joists in a house were breaking when they were only spaning 6'. The fir was mixed with pine and spruce and only the Douglas Fir boards were failing. They felt as if they were is a state of dry rot. I'm beginning draw the conclusion that fir ages twice as fast as other woods. Is anyone else having this experience?
Dry rot has nothing to do with the age of the wood. Dry rot starts by the board getting wet and conditions allow for fungus to grow. After the fungi has been allowed to take hold it eats.... Something in the wood which makes it brittle after said something has been consumed.
Or you have a termite/beetle problem. Either way I'd say you have an outside influence that just likes the taste better.

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post #5 of 6 Old 02-13-2012, 06:46 PM Thread Starter
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The joists were 2x6's on 16" centers, doubled where there was a wall above and there was no evidence of insects. I had been seeing Fir fail in many different houses within a 50 mile radius built in different time periods. This house was the only one that had three different species of wood under the same conditions. There was about 20 boards that were failing and all Douglas Fir. The pine and spruce joists were unaffected.
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post #6 of 6 Old 02-14-2012, 12:55 PM
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I'd cut them open and see if you can find any honeycombing or anything.

Then I'd figure out a way to capitalize off it.
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