Replies

1. 
   Guest_ | May 22, 1999 04:53am | #1

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   Sounds like the posts hadn't adapted to its new environment by the time you painted them. When you get the new ones, let them sit outside (but not in the rain) for a few weeks. Then mix some wood glue 1:1 with water and spread this over the end grain on the butt ends. This will seal better than paint alone. Then prime with an oil-based primer, like KILZ or something. Then apply another coat or two of final paint (oil or latex). If that doesn't do the trick, I don't know what will.

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   Guest_ | Jun 11, 1999 11:58am | #2

   *If they were defective, they were defective (perhaps the wood wasn't seasoned before manufacture?). On the oil paint, I've heard conflicting advice -- painting is like voodoo. I've heard and noticed that oil primer is less flexible, for example on caulk it cracks easily, and so is not the best choice for outside. But oil primer definitely excludes water better, which can be good on something like a glued joint but bad on something like siding, which must release moisture or fail.Finally, what's the difference between conventional oil primer and Kilz? Am trying my first batch of Kilz and like it, especially the fast dry time.

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   Guest_ | Jun 11, 1999 05:38pm | #3

   *Just a note on oil primers. I always like to thin that first coat of oil paint with thinner (1part thinner & 2 parts oil paint). It works just as well as primer if not better. It really gives you maximum penetration into the wood for a great bond and leaves a "rougher" finish for better second coat adhesion. Just be certain that you allow for complete drying between coats. Another benefit is the savings on buying one gallon oil paint without the added cost of primer, especially on small projects.As for the posts, you may want to find a better source / different manufacturer if possible.Pete Draganic

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   Guest_ | Jun 11, 1999 06:16pm | #4

   *I now make it a practice to treat new exterior wood that's to be painted with PPG's Permanizer Plus Wood Stabilizer. Much like Minwax Wood Hardener and similar products, Permanizer penetrates the wood, hardens, and becomes a rot barrier. Since I'm in snow country, I saturate the end grains and lower areas of garage and door trim that'll be exposed to water and snow. Permanizer also claims to serve as a primer, and I've used it as such with no paint failures.

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   Guest_ | Jun 11, 1999 10:42pm | #5

   *Andrew, I agree with you on the defect. Another possibility is that the wood was properly seasoned, but the priming/sealing wasn't thorough enough, so when it was put in a damp environment (outside) it absorbed more moisture. Alternatively, it may have been the glue and primer that caused a problem. I had a problem with some doors which de-laminated when painted. The cause was insufficient curing of the water-based glue used in construction, along with improperly seasoned wood. When the door was primed & painted with latex paint, the glue failed.W.r.t. the oil-based primer on caulk, I think the paintable caulk generally specifies that latex paint should be used. Pure silicone caulk is not suitable for painting, regardless of latex or oil base of paint. The paint will not adhere properly, and it will come off.Finally, not sure what the difference is between regular oil-primer & Kilz. Our local store only carries the Kilz. I think it's advertised as stopping bleed-through of stains from underneath (like from knots in the wood, or from nails rusting). Dries nice & fast, though.

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   Guest_ | Jun 11, 1999 11:05pm | #6

   *This is what I first wrote : "It was my understanding that Kilz, like XIM and Zinsser BIN, is a pigmented shellac, thus its use to cover smoke damage and to prevent bleed through." Now that I've gone to the Kilz Web site , I may be wrong. It "acts" like a pigmented shellac, but it appears to be mineral spirits based. It also contains naptha, which could explain its quick drying. There's an array of Kilz products, and some aren't recommended for total exterior coverage, only for spot priming.

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   john_roy | Jun 11, 1999 11:12pm | #7

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   I installed 7 HB&G 5" turned porch posts last fall on my farmers porch. . .now they are all splitting & checking especially on the glue joints. . . has anyone has this problem???? I primed all sides & butt ends and held bottoms up off deck on stainless steel brackets. . . rep will replace but I am afraid of it happening again . . .would appreciate any comments