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Old 07-01-2020, 08:28 PM   #1
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Roof Coating, Which do I do first?

I think I know the answer to this question, but rather than hope I'm right I thought it best to ask. I want to apply some kind of Cool Coat to the roof of my 29' Excella. Naturally the roof will be cleaned and scuffed before I paint it. At this point I have not selected the finish I will use. My logic says I should install any an all items that need to be sealed, including maxxair fans, the AC, possibly the antennas, etc. first.

Here is my question: Should I apply the primer and the heat reducing finish before or after I install the AC, Roof Vents, etc.?

I hope I've stated this clearly.
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Old 07-01-2020, 09:28 PM   #2
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I would install, seal all fans, ac, antennas before coating the roof. I'm doing the same thing, just added another maxxair fan, solar panel brackets, combiner box, sikaflexed them, added all my cable tie mounts, just need to finish polishing up my AS and then I'm going to seal kote my roof as well.
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Old 07-02-2020, 06:07 AM   #3
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You need a clean, dry surface for whatever sealer you use to bond properly.

Bob
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Old 07-02-2020, 06:22 AM   #4
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while you are at it; place a piece of 2X2 between the roof and inner shell. this will give more support to the fan and skylight and reduce any vibrations.. do this in the space away from the rib. This was suggested by a AS service tech. I had it done when I coated my roof. The 2 by should be about 2 inches bigger than the opening.
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Old 07-08-2020, 07:30 AM   #5
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Quote:
Originally Posted by Mx468 View Post
I would install, seal all fans, ac, antennas before coating the roof. I'm doing the same thing, just added another maxxair fan, solar panel brackets, combiner box, sikaflexed them, added all my cable tie mounts, just need to finish polishing up my AS and then I'm going to seal kote my roof as well.

Mx468,

Thanks, How are you mounting your solar panel brackets? I've seen some folks using 3M VBH tape instead of screws, Thoughts?
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Old 07-08-2020, 07:38 AM   #6
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Quote:
Originally Posted by ROBERT CROSS View Post
^
X2

You need a clean, dry surface for whatever sealer you use to bond properly.

Bob
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ROBERT CROSS,
Makes sense.


Quote:
Originally Posted by Airtandem View Post
while you are at it; place a piece of 2X2 between the roof and inner shell. this will give more support to the fan and skylight and reduce any vibrations.. do this in the space away from the rib. This was suggested by a AS service tech. I had it done when I coated my roof. The 2 by should be about 2 inches bigger than the opening.

Airtandem,
Good suggestion, I'm actually planning to add some angled aluminum or similar for that very purpose.
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Old 07-08-2020, 08:01 AM   #7
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Pete,

I used 3m 3" Extreme Sealing Tape over all the areas that had to be caulked...8+years SFSG.

Bob
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