Installing vinyl siding over existing wood

Old 04-16-09, 06:51 AM
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Smile Installing vinyl siding over existing wood

I have a 13 year old home and the entire house has vinyl siding, except for the bay window, which was put in after the fact (they forgot to put it in). Now the wood is starting to split and rot (cheap wood of course). I'm thinking of putting vinyl siding on it and was wondering if it was okay to put the siding over the existing wood or should I rip off the old wood and install the weatherproofing material and then the siding?

Old 04-16-09, 07:08 PM
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Welcome to the forums! Applying vinyl over an extisting siding will cause elevation problems when you get to your brick mold on the window and on the corner molding. It will protrude past it, and look funky. It would be best to remove the old siding, install OSB if it already isn't there, and apply Tyvek and siding over that.
Old 04-16-09, 07:58 PM
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The old siding may not look the same as the new because of fading and "planned obsolesence".

You always need a moisture barrier under the siding because it really not a waterproof barrier (it only sheds normal rain, except at the vertical joints and the channels at openings).

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