| We repainted my in-laws house a few years ago after doing some remodeling | work. We scraped the old paint off down to bare wood, sanded, cleaned with | TSP, primed with Kilz primer, and applied two top coats of latex paint. | Within a couple years, the paint and primer completely flaked off the | siding leaving bare wood underneath. |
Never use Kilz for exterior priming. It's a stain sealer paint, which means it's designed to dry quickly without soaking in. The only good primer for exterior is oil-base linseed oil primer. Benj M. has one. I've forgotten what they call it now. It used to be called Moorewhite primer. The can still says Moorewhite and/or linseed oil somewhere. I usually add more boiled linseed oil. They've downgraded that kind of paint to meet EPA requirements. Then wait a couple of days before putting on acrylic paint.
You'll see oil base primer and quick-dry oil base primer, as well as acrylic primer. None of those soak in properly. The same is true of the pre-prime stuff they spray on pine lumber. It's junk that will slide off with water exposure. Everyone wants fast-drying, but you can't have fast drying *and* good absorpotion.
Another option is to just put on acrylic solid "stain". You could even wet the siding first, to get a good soak-in. At least it won't peel. But it doesn't look all that great. There's no film and no sheen.
| I don't think it's a moisture issue as we have brand new siding on the same | walls and the paint is holding up fine on the boards directly above and | below the old siding. | | There's obviously an oil or something on the old siding that is preventing | the new paint from sticking. But I'm not sure how to treat the old siding | so the new latex paint won't just flake off again. | | Any tips? | | Thanks, | | Anthony Watson |
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