Cracking 4x6 redwood posts

Old 05-02-11, 07:46 PM
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Cracking 4x6 redwood posts


I recently had a new redwood fence installed with 4x6 pressure treated posts. A few months after installation we stained the fence with messners dark walnut stain (both sides). It's been about a month since the staining and I'm noticing a number of the posts have deep (1/2"- 1") long cracks running through them (see pics below).

A few questions

A. Is the cracking normal?

B. If not, should the posts be replaced

C. What caused the cracking? Stain, warmer weather? Home is in the bay area


Old 05-03-11, 01:51 AM
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It's called checking.
And yes it's normal, and no, the post do not need to be replaced.
I do question why all the gouges in the wood, it looks like they ran it through emboser to make all those ugly marks, What that will do is compress some of the wood fibers in the area where the marks are and not the others. I would think that would promote uneven drying causing more, not less checking.
Old 05-03-11, 06:02 AM
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I believe all the PT posts out here West of Ole Muddy have those marks...believe its to supposedly help it absorb the treatment solution. Don't remember if the East coast had the same....

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