hamkid Posted January 25, 2018 Share Posted January 25, 2018 It has been raining ? lately in my area and have noticed condensation on the ceiling. There are no leaks I have found but, I do not want it to get to the point that leaks might occur. The weird thing is that the condensation does not happen in the cupboards only on the exposed ceiling in certain places. Any suggestions or input as to what I should do is appreciated. Quote Link to comment Share on other sites More sharing options...
sweetleon Posted January 25, 2018 Share Posted January 25, 2018 What model RV is that? I can say that the exposed fiberglass on a Sunrader definitely "sweats" when it's rainy or otherwise humid. Quote Link to comment Share on other sites More sharing options...
WME Posted January 25, 2018 Share Posted January 25, 2018 (edited) Condensation = high humidity warm inside, cold outside temp. The cure can be mechanical, run A/C or a dehumidifier, some sort of passive air exchanger will help or just open a vent somewhere.. The largest sources of increased humidity is YOU during the night. Cooking and showering are less so because both should have a fan vent to remove the humidity. You should check under the cap over mattress. There is a problem there too. Edited January 25, 2018 by WME Quote Link to comment Share on other sites More sharing options...
Totem Posted January 26, 2018 Share Posted January 26, 2018 also and many forget this... RUNNING LIGHTS - if the caulk on these is not legit they will all leak into the cab over ceiling during high rains. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted January 26, 2018 Share Posted January 26, 2018 I'm going to guess that what you own has metal beams/reinforcements in the roof/ceiling. This is creating a 'thermal bridge' across the meager insulation in the roof/ceiling. Warm moisture (humidity) in the air is condensing when is contacts the cold spots. Air is less humid in the cupboards. What do you own? Quote Link to comment Share on other sites More sharing options...
hamkid Posted January 27, 2018 Author Share Posted January 27, 2018 1985 Toyota Escaper Quote Link to comment Share on other sites More sharing options...
WME Posted January 27, 2018 Share Posted January 27, 2018 The Escaper has an aluminum frame so Derek's idea is valid. Ventilate your rig Quote Link to comment Share on other sites More sharing options...
Derek up North Posted January 27, 2018 Share Posted January 27, 2018 The 1985 Escaper Sport with aluminum frame (and foolies). Quote Link to comment Share on other sites More sharing options...
LittleShack Posted January 27, 2018 Share Posted January 27, 2018 That's awesome!! Got one for a 1992 Itasca Spirit?!! Quote Link to comment Share on other sites More sharing options...
hamkid Posted January 27, 2018 Author Share Posted January 27, 2018 Totally awesome! Everyone on this site is top notch! Derek and WME you are both the MAN, you guys never stop dropping knowledge on me! WME what does your name stand for? ??? Quote Link to comment Share on other sites More sharing options...
hamkid Posted January 27, 2018 Author Share Posted January 27, 2018 Also WME can you explain what you mean when you stated this. “You should check under the cap over mattress. There is a problem there too”. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted January 27, 2018 Share Posted January 27, 2018 2 hours ago, LittleShack said: That's awesome!! Got one for a 1992 Itasca Spirit?!! 1992_Spirit.pdf Quote Link to comment Share on other sites More sharing options...
WME Posted January 28, 2018 Share Posted January 28, 2018 The cab-over mattress traps a great deal of moisture. Many older Toys have a lot rot in that section. Not much fun sleeping on damp musty mattress. Quote Link to comment Share on other sites More sharing options...
hamkid Posted January 28, 2018 Author Share Posted January 28, 2018 Yes that part of the rig does have some crunchy wood. I’m not gonna fix anything right now. I have a memory foam mattress any suggestions how to protect it. Trash bags? Quote Link to comment Share on other sites More sharing options...
WME Posted January 28, 2018 Share Posted January 28, 2018 Vent the mattress bottom Plan A https://www.homedepot.com/p/Veranda-0-2-in-x-48-in-x-8-ft-White-Vinyl-Privacy-Diamond-Lattice-73004042/100003591 Plan B https://www.defender.com/product.jsp?id=1818021 Quote Link to comment Share on other sites More sharing options...
shibs Posted January 29, 2018 Share Posted January 29, 2018 I have a cover over my front vent/fan and I leave it cracked all seasons, in my bigger tow behind camper I leave both vents open all season, it airs out and drys. Quote Link to comment Share on other sites More sharing options...
shibs Posted January 29, 2018 Share Posted January 29, 2018 Here is the one I installed. https://www.amazon.com/Camco-Cleaning-Aerodynamic-Included-Hardware/dp/B000BUQODG Quote Link to comment Share on other sites More sharing options...
LittleShack Posted February 2, 2018 Share Posted February 2, 2018 On 1/27/2018 at 3:35 PM, Derek up North said: 1992_Spirit.pdf Thanks Derek!! The photos in this are my rig to a T!! Quote Link to comment Share on other sites More sharing options...
Ron66 Posted August 11, 2021 Share Posted August 11, 2021 On 1/28/2018 at 4:09 PM, WME said: Vent the mattress bottom Plan A https://www.homedepot.com/p/Veranda-0-2-in-x-48-in-x-8-ft-White-Vinyl-Privacy-Diamond-Lattice-73004042/100003591 Plan B https://www.defender.com/product.jsp?id=1818021 WME would it help to put the raised lattice down first and then the defender product. Quote Link to comment Share on other sites More sharing options...
mustrmrk Posted August 12, 2021 Share Posted August 12, 2021 (edited) We used just the hypervent mat from Defender suggested by WME under our sailboat mattress for about 8 years. It came with us to the Escaper and is still in there. It's a great product and we never had under-mattress condensation issues once we started using it. No need for anything else, IMHO. Edited August 12, 2021 by mustrmrk Quote Link to comment Share on other sites More sharing options...
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