Attic Vent in 5er for Full time?
We are currently in the market for a 5th wheel that would be great for full-time use. Presently we are leaning towards Montana's because they seem to be within our price range 40-60K and have been tol...
Forum Discussion
Venting an attic is important if there is air space between sealed space of interior ceiling and the roof exterior. It's not so much cooking moisture but if you have two spaces that are different temps moisture can/will buildup in the attic and can cause rot and mold. Think of a glass full of ice water. The moisture that accumulates on the outside of the glass is due to temp differences. The same will happen in an attic where the temp on the roof is much different than the temp in the attic or the temp of the interior is much different then the attic.
Coming from a construction background I have seen this hundreds of times. We take special care reviewing drawings to make sure that adequate roof venting has been done in buildings that has an attic.
If the rv has a solid roof such as rigid insulation where no air cavity is present a vent system is not needed. Any moisture you might find will be readily seen inside the RV. We see this all the time in truck campers. Moisture on the windows and around the cab over bed. Mitigating that is a whole different issue.
I think it's a valid concern and certainly understanding what type of roof system an rv has and how it's vented is a reasonable question/concern. If there is an attic above the ceiling it must be vented. Until recently (we are looking at 5th wheels) coming from a truck camper background I just assumed that trailers used a similar roof system and not an open attic.
Not only does the attic need to be vented, there needs to be a way for air to flow freely over the entire space. If framing creates a sealed bays then each bay would have to be vented. I have to assume that some form of venting is present in most RV plans where an attic is present. Otherwise we would have seen a lot of moldy campers to date.
Coming from a construction background I have seen this hundreds of times. We take special care reviewing drawings to make sure that adequate roof venting has been done in buildings that has an attic.
If the rv has a solid roof such as rigid insulation where no air cavity is present a vent system is not needed. Any moisture you might find will be readily seen inside the RV. We see this all the time in truck campers. Moisture on the windows and around the cab over bed. Mitigating that is a whole different issue.
I think it's a valid concern and certainly understanding what type of roof system an rv has and how it's vented is a reasonable question/concern. If there is an attic above the ceiling it must be vented. Until recently (we are looking at 5th wheels) coming from a truck camper background I just assumed that trailers used a similar roof system and not an open attic.
Not only does the attic need to be vented, there needs to be a way for air to flow freely over the entire space. If framing creates a sealed bays then each bay would have to be vented. I have to assume that some form of venting is present in most RV plans where an attic is present. Otherwise we would have seen a lot of moldy campers to date.
