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Any hope for my cupping post caps?

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Forum topic by bdresch posted 08-28-2014 02:55 AM 887 views 0 times favorited 11 replies Add to Favorites Watch
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bdresch

121 posts in 1073 days


08-28-2014 02:55 AM

I made and installed these new post caps this weekend and after 1 rain and then sunny day they are cupping and pulling apart. The cap is 3/4” cedar, the skirting is 3/4” cedar cove. I assembled the cove to the top with SS 18ga brads with no glue. The reason I didn’t use glue was because the bottom side of the cap was already primed and painted (these were house trim boards that I didn’t end up using. Is there any way to save these? Maybe pull them apart, sand off the paint, leave them crown up in the sun to hopefully they straighten back out? Then u would use glue and prime/paint before installing. I’m hoping I don’t have to start from scratch because I’m out of cedar and there are 16 total.


11 replies so far

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Minorhero

372 posts in 2070 days


#1 posted 08-28-2014 10:56 AM

That is a very shallow cut on the post cap itself. Usuaully when I see something that shallow and thin it is made of metal.

If you are lucky they will flatten back out as the weather changes. That being said, I think you are probably SOL. I would consider metal alternatives.

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mahdee

3553 posts in 1233 days


#2 posted 08-28-2014 12:18 PM

When you purchase cedar it is usually wet. You can pull them out, let them dry on both side and nail them back to the post.

-- earthartandfoods.com

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bdresch

121 posts in 1073 days


#3 posted 08-28-2014 01:04 PM

This cedar was in my garage for years so it’s pretty dry. I’ll try that though.

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johnstoneb

2146 posts in 1638 days


#4 posted 08-28-2014 01:44 PM

That cedar was flat sawn and nothing you can do will stop it from cupping.

-- Bruce, Boise, ID

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crank49

3981 posts in 2436 days


#5 posted 08-28-2014 02:42 PM

I was taught to always have the end grain smiling at me when I look at the end of a stair tread or cap or shelf. That way when it cups the water will shed off instead of sitting in a bowl.
Your end grain is frowning. :^(
Also, with the grain turned over so that it wants to hump up in the middle you can put a fastener in the middle to try to hold it down and it will still allow for expansion and contraction without splitting.

When, or if, you get these straight be sure the finish is the same on both sides. That might help equalize the cupping forces.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

View BinghamtonEd's profile

BinghamtonEd

2281 posts in 1835 days


#6 posted 08-28-2014 03:25 PM

I know I’m about to get chastised for this, but I’m going to suggest it anyways…

Vinyl post caps, white, at HD for $2.67 a pop. White looks like it would contrast well and match your existing door/window trim. Zero maintenance, pop them on and forget about it.

(Now ducking with my hands over my head for the negative comments I’m sure to receive)

-- - The mightiest oak in the forest is just a little nut that held its ground.

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TheWoodenOyster

1275 posts in 1400 days


#7 posted 08-28-2014 03:32 PM

Um I’ll stand with Ed on the firing line. $2.67 a pop is hard to beat.

-- The Wood Is Your Oyster

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BinghamtonEd

2281 posts in 1835 days


#8 posted 08-28-2014 03:43 PM



Um I ll stand with Ed on the firing line. $2.67 a pop is hard to beat.

- TheWoodenOyster

Care to stand in front of me?

-- - The mightiest oak in the forest is just a little nut that held its ground.

View Yonak's profile

Yonak

979 posts in 986 days


#9 posted 08-28-2014 06:18 PM



I know I m about to get chastised for this, but I m going to suggest it anyways…

- BinghamtonEd

You shouldn’t get any backlash, Ed. Haven’t you been reading the thread about how everyone here is so nice compared to other sites .. no one is made to feel uncomfortable or challenged ?

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BinghamtonEd

2281 posts in 1835 days


#10 posted 08-28-2014 06:21 PM

Oh, I always feel challenged…just not by other people.

-- - The mightiest oak in the forest is just a little nut that held its ground.

View BurlyBob's profile

BurlyBob

3692 posts in 1731 days


#11 posted 08-28-2014 10:14 PM

I tend to agree with Johnstoneb. If you could somehow finagle quartersawn cedar you might have a better chance or work with the cupping and positioning the arc in the cup so it is on the top. A dear friend and expert carpenter showed that trick and numerous other to me years ago. It might be the only way you can use that cedar. In my small experience with cedar, it moves alot, all the time, all seasons. It’s not one of my favorite woods to work with.

Best of luck.

Burly Bob

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