Wood swelling #1: Exteior Redwood

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Blog entry by NapaMike posted 10-27-2007 05:54 AM 823 reads 1 time favorited 4 comments Add to Favorites Watch
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I am building redwood gates with floating, half lap rabbit overlaps in the vertical slats within dado slots in a rigid frame (glued) in Northern California where we get a significant change in humiditiy from dry summer & fall to wet winter. How deep do I need to make the rabbits in the vertical slats to compensate for swell from wet to dry seasons to prevent splitting the rigid gate frame?


4 comments so far

View Todd A. Clippinger's profile

Todd A. Clippinger

8901 posts in 4065 days

#1 posted 10-27-2007 06:24 AM

Man that is a good question. There is a LJ listed as “john” on the second page of the jocks listing. He has an outdoor structure as his icon and is from Cranbrook, Ontario. He might have a good idea. I don’t know how to “link” you so I hope you can find him. He has a lot of outdoor structure experience.

Most of mine is interior, but I would make a guess that if you did a 1/2” wide rabbet and overlapped half of that in the dry season it would allow room for swelling in the wet. That would also depend on the width of the boards. What area you using 1×4’s or 1×6’s?

-- Todd A. Clippinger, Montana,

View WayneC's profile


13753 posts in 4063 days

#2 posted 10-27-2007 06:26 AM

Here is a link to John’s profile

-- We must guard our enthusiasm as we would our life - James Krenov

View Karson's profile


35111 posts in 4366 days

#3 posted 10-27-2007 06:29 AM

Here is a blog that I posted on wood movement

-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware soon moving to Virginia †

View Thos. Angle's profile

Thos. Angle

4444 posts in 3928 days

#4 posted 10-27-2007 02:01 PM

Karson’s got ya covered.

-- Thos. Angle, Jordan Valley, Oregon

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