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Old 09-14-2015, 12:33 PM   #1
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attic vent

I have a Jayco 2003 Eagle Summit fifth wheel and would like to know if it's possible to install a couple of mushroom attic vents for better air circulation to relieve heat build up and moisture.

If there even is an attic. How can I confirm it?

Thanks everyone.


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Old 09-14-2015, 07:00 PM   #2
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Have you considered: Amazon.com: rv roof vents 14x14

Lots of vents, both powered and not.

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Old 09-15-2015, 12:49 PM   #3
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Thanks for the reply.

I have three power vents on trailer roof now. The vents I refer to are small, short mushroom top type that merely set through the roof by drilling (with a round hole saw) and opening which exposes an attic space. This is the place that peaked my curiosity for sufficient air circulation similarly to how home roofs breath in their attic spaces.

Thanks again for responding.
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Old 09-15-2015, 02:55 PM   #4
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I honestly wouldn't worry about it. I know what you're referring to, as some manufacturers (keystone, FR) do this on some models. Why I don't know. Our cedar creek had them. To me it's more of a sales gimic than actually doing any good. The RV roof is stuffed with batten and there is little to no air space between ceiling and roof / plywood like an attic has. The home attic has soffit vents then the ridge vent or whirly birds, air in, air out. No air in on the RV, just a hole in the roof where the vent is if you do this. If you pull one like on our cedar creek, you're staring at packed batten insulation, so there is no air flow. To me, there just isn't much logic behind it. Just another hole in the roof for something to go wrong.
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Old 09-15-2015, 08:06 PM   #5
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I like the idea of some air circulation between the ceiling and roof too.

By no means is the insulation in the ceiling perfect. It doesn't cover every square inch like it should (you've seen how fast these RVs are thrown together).

Knowing that, it tells me heat and moisture makes its way into that space (through various holes in the ceiling, speakers, light fixtures, skylights, heat/AC ducts..ect).

Once there where does it go? It turns to liquid water if left to condensate.

Where? Anywhere on the roof framing and sheathing that is in contact with the cool outside temperature.

So when my warranty expires I will be installing a couple of mushroom vents.
It will allow the air up there to circulate, maybe not as freely as a house attic but it will promote air to move (even through the insulation) up and out along with the moisture it's holding.

For the installation I will be using Eternabond tape to seal the protrusions. As well as all other seams and protrusions on my TT roof.
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