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dtappy3353's avatar
dtappy3353
Explorer
Sep 14, 2015

attic vents?

I recently read that somebody installed 2 mushroom attic vents on his fiver for moisture and heat relief.

I was thinking....has anyone else done this to their rig. I don't even know if my fiver has an attic.

Sent a contact question to Jayco (maker of my rig) to confirm one way or other.

Is this something we all should be concerned with? Adequate venting is critical for the trailer to function like a home....yes/no or is this just another dumb question?

Thanks for the feedback.

dt

18 Replies

  • SCVJeff wrote:
    We are talking about residential type rotating mushroom attic vents, correct? I can't imagine towing those down the road at 60.

    What attic?

    Lantely: if that's the 5er in the pic, I see two ROOF vents. Totally different thing.

    You see Maxx Air vent covers. I have 3 of those. That is not what I am referring to. The attic vent are 6" round vents that allow air flow into the RV attic space they are not visible in the photo. They stick up above the roof only 2" or so
  • My FW has two (2) 'attic vents' factory.

    Yes they are roof vents but only go into open space of roof that is like a small attic due to roof truss structure.
    One piece rubber roof material, 5/16" roof decking, Radiant Barrier then 4 1/2" fiberglass insulation which is laid down over top of 5" wood roof trusses

    NuWa statement:
    Our positive vent system in the attic allows the fifth wheel to breathe and reduces considerably the condensation that the user must deal with when using the product extended or full time in cold climates.

    YES ....attic vents
  • We are talking about residential type rotating mushroom attic vents, correct? I can't imagine towing those down the road at 60.

    What attic?

    Lantely: if that's the 5er in the pic, I see two ROOF vents. Totally different thing.
  • My 2012 5'er came with 2 attic vents factory installed.
    Not sure how well they are working but it sounds like a good idea
  • If you have free space between the ceiling and roof, it will most likely help with the heat in the Summer. My ceiling cavity is packed fully with spun fiberglass and foam insulation.
  • Remember, when you install any type of this type ventilation, YOU MUST have a way to input fresh air. Houses have vents on the underside of the eaves to allow fresh air to enter and then exit. You will have to figure out a way to allow fresh air to get into the RV before the roof top vent will work. There is NO attic in a RV. There may be a space depending on the design of the roof itself. Jayco's have Styrofoam insulation in the roof and NO free space. I cannot think of any RV that will have any type of free space due to the lack of thickness in the roof. ANY space will be filled with Pink insulation or Styrofoam. If there IS space, then you will have NO insulation keeping the sun's heat from going right thru. 5th wheels are not built any different from all other RV's. Doug
  • My fiver is a 2002.

    The individual who I refer to travels around the South and SW. His fiver is newer than mine. The manufacturer of his trailer told him where to install the attic venting.

    I think it's worth exploring.

    Some of us can and some of us may not be able to do it or if it's really worth it.
  • Sounds like something in a trailer park that hasn't moved for 30 years

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