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Old 02-23-2021, 07:51 AM   #1
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2020 28' International
Wilmington , North Carolina
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Head of the bed get's wet when it's cold outside!

We have a 2020 28 footer with a Rear Queen. Love the unit and have been blessed with great reliability and trouble free performance.
We're staying down in the FL panhandle and last week was cold and wet here. Several nights we had the LP furnace going and stayed warm and toasty inside the trailer. The morning after below freezing nights, my wife discovered the sheets in contact with back exterior wall were wet from condensation (much like the windows).
Anybody have a long term solution to this to avoid mold and mildew accumulation?
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Old 02-23-2021, 08:05 AM   #2
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Ventilation and a dehumidifier is needed.
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Old 02-23-2021, 08:14 AM   #3
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Mouse Fur...

Our Classic has the DREADED "mouse fur" on the walls...no condensation allowed.
You have the option of adding it where needed.

Bob
🇺🇸

FWIW....also good for velcro'n things to the wall.😂
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Old 02-23-2021, 09:02 AM   #4
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We live in the Florida Panhandle, and our Airstream is right out in the alley behind the house. We have had the same dampness problem in the past. When our Airstream is not occupied, this situation does not occur. We keep Lucy plugged in with the heat pump on 62 degrees.

I think that just people being in the Airstream causes a certain amount of condensation on the walls. The biggest contributor to this situation is using the shower without turning on the shower exhaust fan.

Brian
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Old 02-23-2021, 10:50 AM   #5
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Rochester , WASHINGTON
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Quote:
Originally Posted by etojeo View Post
We have a 2020 28 footer with a Rear Queen. Love the unit and have been blessed with great reliability and trouble free performance.
We're staying down in the FL panhandle and last week was cold and wet here. Several nights we had the LP furnace going and stayed warm and toasty inside the trailer. The morning after below freezing nights, my wife discovered the sheets in contact with back exterior wall were wet from condensation (much like the windows).
Anybody have a long term solution to this to avoid mold and mildew accumulation?
This may not solve your issue, but I think it's a common problem, year round with these aluminum tubes.People tend to keep them too tightly sealed.
Let me use a summer example.Its very common to see them stored, with every window cranked shut.Everything is sealed up.You need air movement through these, like a big cabin cruiser boat, sitting at the dock.Moisture must be able to vent to outside atmosphere.
Just breathing in these, in winter, releases a large amount of moisture.A simple fix, is install a high volume "Magic fan" in bathroom roof vent.Open bath door,Run it regularly, especially while + after showering, etc.You need to move that moist air OUT.The fan will pull it from rest of trailer.
Run it couple times during the day, especially in winter.
Here in the rainforest of western Washington State, moisture/ mold/ mildew is a constant battle,for many months a year.You can't keep these tightly sealed, IMO.
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Old 02-23-2021, 10:51 AM   #6
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Quote:
Originally Posted by moosetags View Post
We live in the Florida Panhandle, and our Airstream is right out in the alley behind the house. We have had the same dampness problem in the past. When our Airstream is not occupied, this situation does not occur. We keep Lucy plugged in with the heat pump on 62 degrees.

I think that just people being in the Airstream causes a certain amount of condensation on the walls. The biggest contributor to this situation is using the shower without turning on the shower exhaust fan.

Brian
Brian- I didnt see your response, before I replied, but exactly!
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Old 02-23-2021, 12:12 PM   #7
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As well pointed out above, ventilation is the key. Even in very cold weather, we keep a roof vent and a window slightly open. Warm, humid interior air rises out of the vent and is replaced by air coming in through the window. The air from the window may be high in relative humidity, but remember that is relative. As the air warms, the total amount of water vapor in the air remains the same, but the relative humidity drops.

As for your specific problem, the probable source of the water is you and your wife breathing. That is right next to that cold aluminum wall which condenses your breath. According to one internet source (of course, everything on the internet is true), we lose about 1 cup of water per day breathing. Assuming you and your wife slept 8 hours, that internet number would suggest the two of you exhaled about 2/3 of a cup of water while asleep.

Tim
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Old 02-24-2021, 09:19 AM   #8
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Passive Solar Fan

Quote:
Originally Posted by B. Cole View Post
This may not solve your issue, but I think it's a common problem, year round with these aluminum tubes.People tend to keep them too tightly sealed.
Let me use a summer example.Its very common to see them stored, with every window cranked shut.Everything is sealed up.You need air movement through these, like a big cabin cruiser boat, sitting at the dock.Moisture must be able to vent to outside atmosphere.
Just breathing in these, in winter, releases a large amount of moisture.A simple fix, is install a high volume "Magic fan" in bathroom roof vent.Open bath door,Run it regularly, especially while + after showering, etc.You need to move that moist air OUT.The fan will pull it from rest of trailer.
Run it couple times during the day, especially in winter.
Here in the rainforest of western Washington State, moisture/ mold/ mildew is a constant battle,for many months a year.You can't keep these tightly sealed, IMO.
This brings up a good point. In the marine industry, solar powered vents/fans are available to control humidity aboard. Ours (two) ran 24/7/365 in our 40ft sailboat and worked flawlessly.

Has anyone found a similar solution for Airstreams (without cutting additional holes in the skin)?
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Old 02-24-2021, 09:38 AM   #9
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To ensure some cross ventilation, I riveted a small tab or foot to the cover of our Fantastic fan preventing it from completely closing, and we keep the shower fan in the "open" position (motor off), year-round. When we are living in the trailer then cracking open one or two windows further controls humidity (especially at night). We also turn the shower fan on when showering and always use the stove range when cooking or boiling water.

Condensation will occur on the warm side of a cold surface (the inside). The wall insulation of our trailers insn't sufficient to prevent the interior walls from reaching the dew point in cold weather. To control this we need to reduce the water content of the air inside. A dehumidifier will also do the job.
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Old 02-24-2021, 10:29 AM   #10
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Exhale...near a cold window or metal and you get moisture, even when you are sleeping We have some really absorbent towels (shammies) we put under our pillows or down the sidewall when we are somewhere damp and cold. They absorb the water and can be put out to dry during the day (or hauled around in the tow vehicle near a heat vent). We actually considered using dessicant packages down the wall near our heads to keep the moisture under control, but found the towels first and they work pretty well.
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Old 02-24-2021, 11:54 AM   #11
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We have 2-3 large beach towels that we fold into thirds longways and place them between the head of the mattress and the wall of our FC25RBQ. This gives us some insulation between the mattress and the wall which seems to reduce the heat transfer from the mattress to the wall and also moves our heads a couple of inches back from the wall.
Unless it is really cold we dont get condensation on the wall even though we may have some on the window above our heads.
Steve
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Old 02-25-2021, 12:01 PM   #12
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All of the above and a couple Damp Rid containers from HD.
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Old 02-25-2021, 05:44 PM   #13
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If an outside storage compartment is under a part of your bed, make sure you check under your mattress to see if it's wet on the mattress platform too. Body heat moves through the mattress, contacts the cold sleeping platform, and presto, you get moisture.

It's a known issue. It's for this reason that I built raised platforms to allow air circulation between the bottom of our mattresses and the original bed platform that serves as the ceiling in the storage compartment. Problem solved.

An added benefit for the twins is the platform extended the width so the edge of the bed doesn't 'roll' when you're sitting on it

Oh yeah, we also carry a dehumidifier, normally only in spring and fall, this one.....

https://www.homedepot.com/p/GE-20-pt...20LY/310574305
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Old 02-25-2021, 06:31 PM   #14
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We had the same problem many years ago when traveling down the Oregon coast in November. It was particularly bad in Bandon after about 36 hours of rain followed by an evening when the temperature dropped just below freezing. Given the rain, we had the front left window just cracked open but since the humidity was so high outside, it didn't help. A couple of years later when we retraced our trip, we bought a small compressor type dehumidifier and it made all the difference in the world. We ran into similar weather and the air in the trailer the next morning was bone dry with barely a trace of condensation on any of the windows.
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Old 02-25-2021, 07:43 PM   #15
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My friend who lives in Florida runs a dehumidifier to correct t that problem.
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Old 02-25-2021, 09:09 PM   #16
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Try Hypervent

This is a common problem on boats too. We installed Hypervent under our twin mattresses and found it works great. You might need a combination of the other mentioned dehumidification solutions but Hypervent will solve the moisture under the mattress.
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Old 02-28-2021, 12:50 PM   #17
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X2 Hypervent

Quote:
Originally Posted by jeffmc306 View Post
This is a common problem on boats too. We installed Hypervent under our twin mattresses and found it works great. You might need a combination of the other mentioned dehumidification solutions but Hypervent will solve the moisture under the mattress.
If you are camping in cold to cool weather, you'll need hypervent or something sim. We bought it and had not had a problem since.
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Old 02-28-2021, 01:50 PM   #18
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Head of bed let's wet when it's cold outside

We keep bathroom vet open year around even in winter while hunting!
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Old 02-28-2021, 02:17 PM   #19
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Also try to keep an airgap between bed/bedding and wall. Air can then circulate to some extent around head of bed. 3 or so inches seem to help.
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Old 03-04-2021, 07:02 AM   #20
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Our mouse fur got mildew before we realized the need for a dehumidifier. I’ve tried to get rid of it with spraying white vinegar in a test area but it didn’t work. Also tried a dilute solution of bleach and water in a different area with no results. Has anyone had success in getting it out of the mouse fur? We are in the Deep South and use the dehumidifier when our AS in storage and at our camps in cold and/or humid weather, so it isn’t getting worse but it is unsightly and likely unhealthy. Thanks
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