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Old 12-24-2010, 10:25 AM   #1
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Cypress Siding


Some of the cypress siding on my dormers is curling up.It seems to be most prevalent on the sides that are exposed to the sun. Is this because the siding is not mailed properly or is the rain water splashing up after hitting the underside of the siding and then getting zapped by the sun?

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Old 12-24-2010, 12:03 PM   #2
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could be both,they are curling because the face is drying out faster than the back

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Old 12-25-2010, 11:12 AM   #3
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Cypress Siding


Is there foam board underneath?

Is there an air-space behind it?

Is it back-primed?

Is it blind (hidden) nailed or face (exposed) nailed?

Gary
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Old 12-25-2010, 12:12 PM   #4
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Quote:
Originally Posted by GBR in WA View Post
Is there foam board underneath?

Is there an air-space behind it?

Is it back-primed?

Is it blind (hidden) nailed or face (exposed) nailed?

Gary
It's face-nailed directly to OSB sheathing (covered in tyvek), so there's really no air space. It's only primed on the exposed portions.
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Old 12-25-2010, 12:21 PM   #5
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really your only going to be able to try to nail down the curling and try to maintain a good paint finish,its doing what it naturally does if there's a difference in drying from front to back and the grain is running in the right direction

you may be better off replacing the badly curled areas

are these clapboards? if so they should be nailed to the studs

Last edited by Tom Struble; 12-25-2010 at 12:34 PM.
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Old 12-26-2010, 09:53 AM   #6
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Yes, they are clapboards. The framer installed them and I don't know if he hailed them tot he studs or not.

I plan on replacing the all of the siding on the Southern sides of the dormers. But this time I want to make sure I do it right. Some say the curling is due to poor nailing while other say it is becasue the backside was not stained. On reno contractor told me he sees the same thing on every dormer. I('m not sure what to believe.
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Old 12-26-2010, 11:14 AM   #7
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well educate yourself then

http://www.fpl.fs.fed.us/search/sear...ubyearend=2010
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Old 12-29-2010, 06:36 PM   #8
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What sort of nails would you use on this type of siding? I think that may be one of the problems. I looked at the siding more carefully earlier this week and the framer only used brad nails. I imagine some sort of galv ring shank would be appropriate. Any thoughts?
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Old 12-29-2010, 07:29 PM   #9
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the premium nail for any face nailed siding is a ring shank stainless steel siding nail,lenght depend on thickness of the siding and sheathing but you need a 11/4''stud penetration

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