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Old 03-25-2012, 12:16 PM   #1
Junior Member
Join Date: Mar 2012
Posts: 6
Class A roof sealing maintenance requirements

I bought a 2009 Winnebago Sightseer in 2009. We only have 7,000 miles on the coach. We store it in a covered facility where it gets no direct sun. My dealer is telling me that I need to re-seal the roof (heat pumps, vents, etc) and the radus where the roof attaches to the coach. Can anyone tell me if the roof of a class A coach needs to be on a maintenance schedule that calls for having all of the old sealer removed and re-sealed every year. Thanks in advance for your input.

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Old 03-25-2012, 12:43 PM   #2
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Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,582
I think the dealer is blowing smoke.
But in order to retain the ten year roof warranty you do have to check the roof radius sealant - every six months . Winnebago uses a special adhesive sealant. They have changed the brand a few times and you might want to call customer service to get the brand for your coach. You can also go online to their web site and get a sealant call out sheet.
You push on the fiberglass next to the sealant and see if it moves away (very small crack) from the gutter or fiberglass.
To repair it customer service said to use a flexible knife blade to carefully remove the old sealant and then re-caulk.
They used Manus-Bond 75-AM from Manus Products Waconia MN. 952 442 3323 on my motor home.

Below is a cross section of the roof construction.

I have needed to re-caulk the satellite dish cable entry point on the roof once. Dicor self leveling sealant is what is used in the areas other than the roof radius.
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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maintenance, roof

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