Linseed oil on exterior wood

graywings123January 30, 2011

A well-known painting contractor in my area approached me regarding painting my 90 year old wood house. Part of his sales pitch was that he applies linseed oil to the exposed wood prior to applying latex paint. Can anyone tell me more about this?

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sombreuil_mongrel

If it's exactly as described, no; bad idea.
If he actually means a primer doctored with additional oil, well, ok maybe.
Sometimes I double prime: a doctored primer diluted with extra oil and turpentine, then a coat of regular oil primer, then acrylic finish. This can sometimes help paint stick to very dry wood, but the surest treatment is to sand off the weathering, then prime normally. Really deteriorated stuff has to be epoxy-treated or replaced. Sanding can help winnow out the worst spots. Surface treatments are not a cure-all.
Applying finish paint directly over wood that has been treated with pure linseed oil is not a recipe for success, IMO.
Casey

    Bookmark   January 31, 2011 at 12:20PM
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graywings123

Thanks for the explanation. This was a relatively brief front porch conversation, and he may have left some information out. I've been dabbing paint samples on the walls, which has made me very popular with the trades - LOL!

    Bookmark   February 1, 2011 at 3:39PM
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Faron79

Hey Gray!

Most Linseeds are VEEeeeeeeeeeeRRRRRYYY slow drying oils.

As Sombreuil gets at...if the wood is sketchy, SAND IT, and remove dust. NOW you've got a sound base that'll hold paint.
Double-priming can help a LOT.

How's the insulation-level and vapor-migration in your house?

Faron

    Bookmark   February 3, 2011 at 11:59AM
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graywings123

I don't know, Faron. There are plenty of air leaks in the house, but I don't get a sense it's through the walls. It's at the floor and around doors. I saw your other thread on this subject - lots of good info there. Thanks!

    Bookmark   February 4, 2011 at 8:50PM
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