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KemoSabe
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644 Posts
Vinyl trim should be fastened with 15 gauge stainless steel fasteners.

It is prone to thermal expansion and 16 gauge or 18 gauge nails are easily worked by the movement.

Also, if you paint it darker than an off white, some companies won't warrant the product due to installation, same goes with the fasteners.

Decide what product you will use and follow their installation guidelines to the T.
 
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KemoSabe
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644 Posts
I'm replacing white with white so no painting involved. I have a couple of different brands of vinyl available - Azek, Koma, a 3rd I can't recall off hand. Do recommend any in particular?
I've worked primarily with Azek. Certainteed is another one.

Koma, X-board and Kleer are a few more, as well as Perma-Trim. I don't have much experience with these though.

I highly recommend using PVC cement on any connections. Azek has their own proprietary cement that should be used to uphold their warranty.

Azek maintains it's color well and they have a sealed factory edge available that will help prevent algae from growing in the pores. Any machined edges should be sanded down to about 150 or 180 to help seal the edges. This will help with dirt and algae in the machined edges.
 
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