Prime both sides of new siding?

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Old 12-27-08, 12:00 PM
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Prime both sides of new siding?

I am having the exterior of my house painted in a couple of weeks and before they get here there is some trim and some wood siding I want to replace. My question is, do I need to prime both sides of the trim/siding before I put it up to protect the wood from the weather? Or can I just put it up and then prime what is showing so he can paint it? FWIW, I live in Southern California, so the weather isn't very severe, if that matters. Thanks in advance for any opinions.
 
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Old 12-27-08, 12:10 PM
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Yes, I'm not a painter, but everything I've ever seen says you should prime all sides and cut ends at a minimum. Some people even recommend putting one topcoat on the backside.
 
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Old 12-27-08, 04:55 PM
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It never hurts to back prime siding especially if they are pieces near the ground or otherwise apt to get moisture forced behind. Why do you need to replace some of the siding/trim? If it was rotten or moisture damaged - PRIME IT!!
 
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Old 12-27-08, 08:46 PM
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Your recommendation is just primer on the back?
 
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Old 12-27-08, 10:40 PM
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Good point Mark. I'm replacing it because it is a bit warped and I am also doing all the trim on the house. If I leave the siding I am talking about up, the new trim won't sit right. So, I guess if it is warped, it needs to be primed, although the siding is 30 years old, so I would say it has done it's duty.
 
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Old 12-28-08, 05:15 AM
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[I] "Your recommendation is just primer on the back" [I]

An oil base wood primer is normally sufficent and although a coat of finish wouldn't hurt IMO it's not needed.
 
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