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Old 11-20-2013, 09:39 AM   #1
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Exterior Painting - Two coats on Trim?


I'm currently doing a pretty major exterior renovation - taking all of my cedar siding down to the wood, replacing and patching bad wood, etc...

Everything gets primed with an oil-based primer, usually with some penetrol added. I'll certainly do two coats of the grey wall color (2nd coat will have to wait til spring though), but I'm wondering if two coats of the white trim color is really needed. I'm using Duration for the trim and it's super thick and with white primer behind it there really aren't any coverage issues. The labor time on the trim/windows is also quite high, and a lot of it gets covered with aluminum storm windows anyways. Will the second trim coat really make things last longer? Maybe just double up on the face of the boards?

Thanks!

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Old 11-20-2013, 03:40 PM   #2
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Exterior Painting - Two coats on Trim?


You can get away with one coat but 2 is always best

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Old 11-20-2013, 07:14 PM   #3
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Exterior Painting - Two coats on Trim?


You will be better off with two coats..
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Old 11-20-2013, 07:54 PM   #4
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Exterior Painting - Two coats on Trim?


^^^Agree
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Old 11-20-2013, 09:10 PM   #5
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Exterior Painting - Two coats on Trim?


Anyone care to elaborate? Is it an issue of aesthetic coverage or thickening the coat to increase weather resistance? Anytime I've seen paint fail it wasn't because the coat wore through it was because it lost adhesion to the substrate and peeled away - in this case it doesn't seem like making the coat thicker would help anything.

Any reason waiting to do the second coat in the spring would be a problem?
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Old 11-20-2013, 11:27 PM   #6
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Exterior Painting - Two coats on Trim?


Quote:
Originally Posted by chimpywrench
Anyone care to elaborate? Is it an issue of aesthetic coverage or thickening the coat to increase weather resistance? Anytime I've seen paint fail it wasn't because the coat wore through it was because it lost adhesion to the substrate and peeled away - in this case it doesn't seem like making the coat thicker would help anything.

Any reason waiting to do the second coat in the spring would be a problem?


It's an issue of thickening the coat to increase weather resistance.

Duration is one of the few paints that technically can be warrantied with a one coat application. But, it has to be a very thick coat (8mil wet). Like you said, Duration is thick out of the can and its designed to go on thicker than other paints. But it's very difficult to get that much paint on at one time with hand application on something like a window.

Paint films need to be a certain thickness to preform as there designed to, and it generally takes two applications archive that.



I don't see a problem with 2nd coating in the spring. Just make sure the surface is clean.
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Old 11-27-2013, 05:30 AM   #7
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Exterior Painting - Two coats on Trim?


to get an idea coats you can go major painting sites

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