Replies

1. 
   Riversong | Mar 20, 2008 07:58pm | #1

   You either have a moisture problem or inproper wood prep before painting (too moist?).

   Pine generally requires at least touch priming over knots with BIN alcohol-based primer (shellac).  Then any good quality water-based primer is acceptable.

   But I'd look first for moisture intrusion - either from poor flashing/caulking details or from indoor humidity diffusion.

    

   Riversong HouseWright

   Design *  * Build *  * Renovate *  * Consult
   Solar & Super-Insulated Healthy Homes

   
   

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   Edited 3/20/2008 12:59 pm ET by Riversong

2. 
   DonCanDo | Mar 20, 2008 08:20pm | #2

   Kilz and Bullseye are brands, not a specific primer.  They both make good products.  The "best" primer for exterior use is usually an oil-based primer like Zinsser Cover Stain, but if there's moisture behind it, oil will peel just as soon as latex.  Actually, it may even peel sooner because oil-based paint/primers are more impermeable to moisture so more of it might build up behind it.

1. 
   rasher | Mar 21, 2008 12:08am | #3

   I use only Benjamin Moore oil-based exterior primer (Benjamin Moore Fresh Start Moorwhite¯ Penetrating Alkyd Primer) and haven't had any problems whatsoever.