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02-09-2018, 06:24 PM
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#1
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2 Rivet Member
Currently Looking...
Jax
, Florida
Join Date: May 2015
Posts: 20
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How to DRY wet Insulation?
We FINALLY found and purchased our Airstream. A 1999 Safari 25. Overall great condition. Stored under shelter for a good deal of its days. There are a few leaks as due to a lapse in maintenance. Today I removed the forward fan which had gobs of different sealant layers. With the fan removed I reached into find wet insulation between the outer and inner skin.
My question is how can we speed the drying process so we can remount the fan? I was thinking to strap a leaf blower on the roof and point into the opening. Not sure if this will help.
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02-09-2018, 06:28 PM
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#2
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Overkill Specialist
Commercial Member
2020 30’ Globetrotter
2014 23' International
Dadeville
, Alabama
Join Date: Oct 2015
Posts: 4,516
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Heat and air flow
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02-09-2018, 07:50 PM
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#3
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,351
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Pull down any trim that exposes the insulation....AC panel, fan trim, ect. the position fans to blow in that direction and put a dehumidifier in the trailer.
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02-09-2018, 07:59 PM
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#4
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Rivet Master
2012 25' FB Eddie Bauer
Vintage Kin Owner
Virginia Beach
, Virginia
Join Date: Sep 2004
Posts: 7,801
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Quote:
Originally Posted by CRH
Pull down any trim that exposes the insulation....AC panel, fan trim, ect. the position fans to blow in that direction and put a dehumidifier in the trailer.
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Agree
__________________
Today is a gift, that's why they call it the present.
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02-09-2018, 08:58 PM
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#5
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Rivet Master
2007 30' Classic
KW
, Ontario
Join Date: May 2012
Posts: 998
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If it's just a bit damp it will dry if exposed to air, but not if air cannot reach it. If it is soaked it will not dry. You have remove it and replace it.
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02-09-2018, 09:27 PM
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#6
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,351
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I don't see that there is a practical way to remove insulation between the skins. If it is soaked, the water will eventually go down, which is unfortunately going to be the edge of the floor.
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02-10-2018, 06:19 AM
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#7
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Rivet Master
1981 31' Excella II
New Market
, Alabama
Join Date: Sep 2011
Posts: 6,145
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Water will trickle down and end up in the C-channel at the floor then it will soak the floor. All these things leak at some point. I have found many leaks hard t find unless you remove the inner skins and sit out there in the rain and watch for leaks. If you are that far into it replace with rigid insulation.
Perry
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02-10-2018, 08:46 AM
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#8
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Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
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As mentioned above water will flow downwards. Since you have no idea of when it was wetted you have no idea of how far it may have gone.
If it was just from periodic rains the water may not have traveled that far. I would start to pull out the insulation and hopefully reach dry material before you run out of reach. Based on what you find will determine any additional action.
You will never get it dry in place unless you run the temperature sky high in the trailer or wait till Fl. summer.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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02-10-2018, 10:02 AM
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#9
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4 Rivet Member
1972 31' Excella 500
2017 30' Classic
Grapeview
, Washington
Join Date: Sep 2017
Posts: 456
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Out of the weather (Under cover and preferability controlled environment ), heat, air flow, dehumidifier(s), and time.
Best regards and safe travels
__________________
Scott & Liz
2017 Classic
2016 RAM 3500 6.7
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02-10-2018, 11:00 AM
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#10
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3 Rivet Member
2013 28' Flying Cloud
Penn Yan
, New York
Join Date: Mar 2016
Posts: 138
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Wet insulation
I was informed at the factory that the insulation used in the AS will not develop mold and dries easily. If you can expose that area it will eventually dry out.
Good luck.
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02-10-2018, 11:03 AM
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#11
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Rivet Master
2000 25' Safari
Davidson County
, NC Highlands County, FL
Join Date: Aug 2006
Posts: 4,493
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Quote:
Originally Posted by dasher
We FINALLY found and purchased our Airstream. A 1999 Safari 25. Overall great condition. Stored under shelter for a good deal of its days. There are a few leaks as due to a lapse in maintenance. Today I removed the forward fan which had gobs of different sealant layers. With the fan removed I reached into find wet insulation between the outer and inner skin.
My question is how can we speed the drying process so we can remount the fan? I was thinking to strap a leaf blower on the roof and point into the opening. Not sure if this will help.
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I see you are near JAX. The insulation will dry pretty quickly as soon as the sun heats up the exterior skin. Since it's supposed to be in the 70's and 80's all week you should not have any long term issues..
If you are outside making this repair, go ahead and re-install the fan so that it is water tight. It's best if there is no chance for rain or dew to re-wet everything.
Leave the interior trim off so that air can get to the insulation. As others have suggested, airflow or dehumidification will speed things along.
A different issue:
Your trailer is one of those prone to leaks at the area where the rear bumper storage lid goes through the exterior wall. Make sure this has been resolved on your trailer. I found out the hard way! (search "rear bumper storage leak" on this forum)
__________________
Alan
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
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02-11-2018, 12:40 AM
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#12
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Rivet Master
1992 29' Excella
Virginia Beach
, Virginia
Join Date: Jul 2012
Posts: 747
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Quote:
Originally Posted by dasher
We FINALLY found and purchased our Airstream. A 1999 Safari 25. Overall great condition. Stored under shelter for a good deal of its days. There are a few leaks as due to a lapse in maintenance. Today I removed the forward fan which had gobs of different sealant layers. With the fan removed I reached into find wet insulation between the outer and inner skin.
My question is how can we speed the drying process so we can remount the fan? I was thinking to strap a leaf blower on the roof and point into the opening. Not sure if this will help.
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Structural drying is what I did for a living. For nearly thirty years. I have not read all of the comments, so I don't know what's been suggested already, but here's what I know to be true. Insulation works because it traps air. For this reason it dries very well with exposure to ventilation, no matter how wet. Insulation is actually one of the easiest things to dry. Under the right conditions I use to dry it in hours. In this case it may take a few days. Naturally, the wetter it is the longer it may take to dry.
Increased Air flow will help, but it does not need to be extremely forceful. Mostly it just needs to have a way for the water to evaporate out. It may not be necessary to remove more than the fan.
Make sure the fan hole is tented to prevent further moisture intrusion, but also to allow air flow and evaporation.
I imagine the insulation is fiberglass batt. It's not an organic fiber so it will not mold like say cellulose would.
PM me and include a phone number to reach you if you'd like more detailed information.
Pete
__________________
Pete
Virginia Beach, VA
1992 29' Excella Classic
TV 2006 Dodge Ram 2500
Mega Cab Diesel 4x4
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02-11-2018, 06:39 AM
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#13
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Rivet Master
2009 27' FB Flying Cloud
1982 31' International
1991 35' Airstream 350
Jay
, Oklahoma
Join Date: Oct 2006
Posts: 1,706
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As mentioned numerous times: moving warm, dry air.
Get the trailer somewhere it cannot get wet.
Fans, DEHUMIDIFIER, heat, and time.
Regards,
JD
__________________
Jeff & Cindy
'09 27FB Flying Cloud;'82 31 International
'91 350 LE MH; '21 Interstate 24GT
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02-11-2018, 07:44 AM
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#14
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Rivet Master
2006 25' Safari FB SE
Broadway
, North Carolina
Join Date: Mar 2007
Posts: 838
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I just fixed a small leak in the popup bathroom fan.
Before replacing the interior trim, you can turn on the fan and tape a piece of stiff cardboard over the opening with painters tape. It will pull air from the insulation space.
Might work for the large ceiling fans too.
__________________
2006 Safari SE FB
2000 F150 4.2L (retired), 2011 F250 6.2L, 2010 ML550, 2000 Excursion 7.3L
Broadway, NC
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02-12-2018, 08:26 PM
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#15
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2 Rivet Member
Currently Looking...
Jax
, Florida
Join Date: May 2015
Posts: 20
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Thanks for al the info,
I have the Airstream covered and I have been applying airflow to the open hatch. Will be re installing the fan soon with butyl underneath and then covering with Eternabond tape. Anyone have any reason not to cover with 4 inch eternabond? Seems like a good alternative to caulking type sealant.
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02-12-2018, 08:29 PM
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#16
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2 Rivet Member
Currently Looking...
Jax
, Florida
Join Date: May 2015
Posts: 20
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Yes there rear bumper issue is there. I have it well covered at the moment as I make my way back along the roof. I am exploring removing the bumber rail and adding a small aluminum flashing section along the exterior skin, looking for best ideas to solve this issue permanently.
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02-12-2018, 10:58 PM
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#17
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Rivet Master
Currently Looking...
Walnut Creek
, California
Join Date: May 2015
Posts: 3,952
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Sounds like you are getting good recomendations. Never dried out an Airstream, however ...... the guys who save Moore 24s from the dumpster recommend same approach. They put the boat in a heated enclosed building with multiple dehumidifiers running. The hot dry air removes the moisture that the fibreglass hull has absorbed through years of sailing, but it takes several months. You likely will have faster results. Hope all works well with your seal work. Pat
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