Painting Old Cedar Lap siding ??

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Old 06-27-07, 08:39 AM
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Painting Old Cedar Lap siding ??

A few years ago we scraped, sanded, etc our exterior and then primered and painted it white. It was a lot of work and the next spring it was coming off. We repainted areas with the same result. Some places it comes off in sheets, others it just looks bad chipping sort of. It is coming off the areas that were down to the bare cedar lap siding. Our house was built in the early 1900s. I have noticed wherever we have replaced siding the paint looks wonderful. Is there something else we need to do to the old cedar to have better success? At this point I hate to put any more work and money without a solution.
 
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Old 06-27-07, 04:43 PM
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Old houses usually have inadequate insulation and no vapor barrier. When temp changes pull the moisture thru the exterior walls it affects the paint. It is usually best to use a latex primer and latex house paint in these situations.
Painted cedar usually looks best if it is primed with an oil base primer but........

Where the siding has been replaced - was there insulation or vapor barrier added?
 
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Old 06-27-07, 10:02 PM
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The whole house has blown in insulation now. There is nothing different behind the new siding. It is coming off in large peeling pieces in some areas and in other areas it just looks like it is in need of a new paint job....even when we just had. Maybe it is two issues?? The large peeling sheets is moisture and the other.....could it be too hot or something. We did try to really watch that. The other thing is I wondered if there could be dust. We did not wash it as it would take so long to dry and then either it would be dirty again or damp we thought.
 
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Old 06-28-07, 03:56 AM
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Yes the large peeling does sound like a moisture issue, hard to say about the rest.

While not every house needs to be washed prior to painting it is always a good idea to wash them. It usually takes from a few days to a week for the siding to dry after pressure washing. Any new dirt would be minimal compared to the years of dirt accumalation previously on the surface. Pressure washing also aids in scraping

Was the siding chalky before you repainted? What type/brand of paint/primer did you use?
 
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