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Old 08-07-2018, 10:43 AM   #1
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More sealant required on roof?

Forgive me if this has been covered before,did a bit of searching and didn't find any forums directly related to roofs. Our new trailer is parked very close to our garage that I can step onto the roof from the garage roof. I walk very gingerly on plywood to displace my weight,though I see footprints where the dealer had his mechanics install the vent covers. Anyway,was doing an inspection of all joints for total coverage with sealant,and noticed that where the front and rear of the trailer meets the roof,the sealant is applied in a figure 8 pattern,easiest way to describe. Is this done for a reason such as expansion and contraction,or is it companies just cutting corners? I have ordered more lap sealant to fill in these " voids " ,but just want to make sure that is a good idea beforehand
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Old 08-07-2018, 11:02 AM   #2
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I think it is obvious that lap sealant has to cover the entire gap or seam. If the "figure 8" doesn't do that, it's a shoddy job. In fact, pretty much worthless.

I've seen close zig-zagging to produce wider seam coverage, relying on the self-leveling characteristic to fill in between, but nothing I would call a figure 8. Can't think of any reason to do that, even if well done so that the entire seam is well-covered.
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Old 08-07-2018, 11:12 AM   #3
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My thought is always if you feel like there isn't enough, lay some more down. And check it again in a few weeks.
Dan S.
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Old 08-07-2018, 01:21 PM   #4
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I'm with Gary on that!

Good luck, happy trails, and God bless!
Joe & Annette
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Old 08-07-2018, 11:13 PM   #5
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If it is a new TT, I would be taking it back to the dealer and sending pics to the manufacturer.
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Old 08-08-2018, 08:03 AM   #6
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IMHO, it is generally a better idea to remove improperly installed sealant and install it properly than to add another layer over an old layer.
'04 Newmar Mountain Aire 4016
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Old 08-20-2018, 01:37 PM   #7
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Before and after photos,lap sealant is tan colour,should darken over time,but nobody will be seeing it anyways.
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roof, seal, sealant

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