Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Jayco RV Owners Forum
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-08-2023, 01:15 PM   #1
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
A/C Gasket

Hello all,

Last month during pre trip maintenance I "re-caulked" my roof top AC. Shortly after, I found out that was a mistake! Now, back home with a couple of months of down time, I want to change out the gasket (never been changed) and try to correct the caulk problem. Preliminarily, I found what looks like a small hole in the roof membrane about the diameter of pencil lead under the rear part of the AC.
My questions are:
1. How should I repair the hole? Should I use Dicor self leveling caulk ,Eternabond tape or something else?
2. It seems there is a wide range of AC gaskets. I would like to get one of high quality. I have looked at Steele Rubber (Amazon $ 83). Does anyone have any other recommendations?
3. I also noticed that the rear section of the AC sits directly in contact with roof. Is this normal?
.
The AC is a Coleman Mach(Airxcell 4000 series roof mount). I bought this TT new and have had no AC issues. When not in use, it is kept under a shelter.

As always, any advice, suggestions, or recommendations would be greatly appreciated.

Thank you.
__________________
2014 Jay Flight Swift 198RD
2008 Chevy Silverado 2500 6.0 HD LT
1971 Brentwood Continental 17í TT (2005-14)
TAK14Swift is offline   Reply With Quote
Old 06-08-2023, 02:59 PM   #2
Senior Member
 
Jagiven's Avatar
 
Join Date: May 2012
Location: Minnesota
Posts: 9,478
The AC sits right on the roof membrane. Some AC's are larger and have an extra piece of foam to help provide additional support to the AC.

If you found a pin hole. How to fix it I would say the fix really depends where it is at.

If this small hole is far enough outside the foam gasket, I would not hesitate to use eternabond. This sounds like your scenario.

If this hole is really close to the gasket, then here are my thoughts.

I really like Eternabond, but I'm not sure I would want to create overlap or butt joint, as the edge of these intersection could allow water to leak past as the foam might not conform to the sharp edge or possible gap. If you could find a large piece of eternbond that was say 16-20 inch square you could place over the opening, and then cut out for the AC, I would like that solution.

Decor, again pending on the location. Maybe with the AC removed. Lift the membrane and apply a little Decor. Then apply a thin layer to the top side of the membrane to seal form a good sea. Once the Decor is dry then apply the new foam gasket and install the AC.

With any solution I would just be nervous about creating a gap that water could leak past.

If you use Eternabond, remeber do not stretch it, or it will release from the roofing membrane within a few days.
__________________

2012 Jayco X23B
2020 Ram Laramie 3500 SRW Air ride 50Gal fuel tank.
2007 Dodge Dakota Quad Cab (retired from towing)
Equal-I-zer 4-Point Sway Control
Jagiven is offline   Reply With Quote
Old 06-08-2023, 04:22 PM   #3
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
The gasket kit comes with extra pieces to support the unit. I purchased the kit from a Jayco dealer.
Attached Thumbnails
IMG_3581.jpg  
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-08-2023, 04:28 PM   #4
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
Thank you for your response Jagiven. I should have been more specific. The hole is not near the gasket so it sounds like Eternabond could be the best solution.
__________________
2014 Jay Flight Swift 198RD
2008 Chevy Silverado 2500 6.0 HD LT
1971 Brentwood Continental 17í TT (2005-14)
TAK14Swift is offline   Reply With Quote
Old 06-08-2023, 04:30 PM   #5
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
Tunce
Thanks for the photo. I have yet to pull my AC unit so this is helpful.
__________________
2014 Jay Flight Swift 198RD
2008 Chevy Silverado 2500 6.0 HD LT
1971 Brentwood Continental 17í TT (2005-14)
TAK14Swift is offline   Reply With Quote
Old 06-08-2023, 09:40 PM   #6
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
Quote:
Originally Posted by TAK14Swift View Post
Tunce
Thanks for the photo. I have yet to pull my AC unit so this is helpful.
It’s an easy pull with one person & what I did was tape the perimeter of the A/C with painters tape ( on the roof ), I used a soft lead pencil, this way when you reinstall it it fits perfectly over the hole and your 4 corner bolts will line up. No additional help is required if you tape the outline and that means only one trip on the roof
BTW I’m on my 3 gasket over 13 years & have owned it for 10
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-09-2023, 06:16 AM   #7
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
Quote:
Originally Posted by Tunce the traveler View Post
It’s an easy pull with one person & what I did was tape the perimeter of the A/C with painters tape ( on the roof ), I used a soft lead pencil, this way when you reinstall it it fits perfectly over the hole and your 4 corner bolts will line up. No additional help is required if you tape the outline and that means only one trip on the roof
BTW I’m on my 3 gasket over 13 years & have owned it for 10

Sounds like a good plan as I'll be doing this by myself. I am sure I have extended my gasket way past it's normal service life.

Thanks
__________________
2014 Jay Flight Swift 198RD
2008 Chevy Silverado 2500 6.0 HD LT
1971 Brentwood Continental 17í TT (2005-14)
TAK14Swift is offline   Reply With Quote
Old 06-09-2023, 09:48 AM   #8
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
One more helpful word of advice as long as youíre going to be using Eternabond tape. Wrap all 4 sides of the roof cutout because just 1 small leak ( as shown in the picture ) will destroy the roof and when you find out itís too late.
Remember to snug down those 4 bolts ( gently) before the first trip out & after your last trip out for the season.
Attached Thumbnails
IMG_3582.jpg  
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-09-2023, 10:11 AM   #9
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
Seeing that weíre talking about water intrusion & you probably have the same window frame as I do thereís another area you should check for a leak. Your door window frame might not be caulked properly and water leaking at this location will destroy your door. I removed my window ( there was no caulk) caulked it and replaced it with tinted safety glass.
Attached Thumbnails
IMG_3583.jpg  
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-09-2023, 10:21 AM   #10
Senior Member
 
craigav's Avatar
 
Join Date: Mar 2017
Location: North Texas
Posts: 2,943
Quote:
Originally Posted by Tunce the traveler View Post
One more helpful word of advice as long as youíre going to be using Eternabond tape. Wrap all 4 sides of the roof cutout because just 1 small leak ( as shown in the picture ) will destroy the roof and when you find out itís too late.
Remember to snug down those 4 bolts ( gently) before the first trip out & after your last trip out for the season.
Also to note, when I replaced mine last there was a Yellow Tab (one or more) as seen in your photo and the installation instructions stated to tighten the A/C mounting bolts until the "Tab" was flush with the roof top (instead of a particular torque for the bolts). ~CA
__________________
2010 GreyHawk 31SS
craigav is offline   Reply With Quote
Old 06-09-2023, 12:34 PM   #11
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
Quote:
Originally Posted by Tunce the traveler View Post
One more helpful word of advice as long as youíre going to be using Eternabond tape. Wrap all 4 sides of the roof cutout because just 1 small leak ( as shown in the picture ) will destroy the roof and when you find out itís too late.
Remember to snug down those 4 bolts ( gently) before the first trip out & after your last trip out for the season.
Are you saying wrap the cutout while the AC is pulled?
I canít tell what it is that you circle in the photo of the cutout.

Thanks
TAK14Swift is offline   Reply With Quote
Old 06-09-2023, 02:03 PM   #12
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
Quote:
Originally Posted by TAK14Swift View Post
Are you saying wrap the cutout while the AC is pulled?
I can’t tell what it is that you circle in the photo of the cutout.

Thanks
If you enlarge it you will see a water stain mark where water started to enter the cutout edge of my roof & if i hadn’t seen it it would have destroyed my roof. And that’s why I suggested that you wrap that edge with Eternabond tape to completely waterproof that open cut
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-09-2023, 02:07 PM   #13
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 15,009
Quote:
Originally Posted by TAK14Swift View Post
Are you saying wrap the cutout while the AC is pulled?
I canít tell what it is that you circle in the photo of the cutout.

Thanks
Don't have the tape under the gasket...
__________________
DISNEY LOVERS
Grumpy is online now   Reply With Quote
Old 06-09-2023, 02:20 PM   #14
Senior Member
 
Tunce the traveler's Avatar
 
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,585
Quote:
Originally Posted by craigav View Post
Also to note, when I replaced mine last there was a Yellow Tab (one or more) as seen in your photo and the installation instructions stated to tighten the A/C mounting bolts until the "Tab" was flush with the roof top (instead of a particular torque for the bolts). ~CA
When you first install the gasket that yellow tab will be flush with the roof but as the gasket gets tired over time ( say after 1 season) you’ll need to snug those 4 bolts just a tad to prevent that gasket from leaking in one side or the other. My yellow tab shows how much it squeezed down after its 2nd season. Do not compress the gasket just snug a tad each year and you’ll be fine.
__________________
2010 Jayco Hybrid EXP21M
2013 Toureg TDI
Tunce the traveler is offline   Reply With Quote
Old 06-09-2023, 03:08 PM   #15
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
Quote:
Originally Posted by Tunce the traveler View Post
If you enlarge it you will see a water stain mark where water started to enter the cutout edge of my roof & if i hadnít seen it it would have destroyed my roof. And thatís why I suggested that you wrap that edge with Eternabond tape to completely waterproof that open cut

I understand now. I plan on pulling my AC this weekend.

Thank you
TAK14Swift is offline   Reply With Quote
Old 06-09-2023, 04:15 PM   #16
Member
 
TAK14Swift's Avatar
 
Join Date: Jul 2018
Location: Thomasville
Posts: 73
I’ve just pulled the AC. There is a small hole where the gasket sits so I may try a little dicor there as mentioned earlier. Thankfully no sign of water intrusion. Biggest challenge is going to be removing the caulk I put on. I’m removing some but it’s a slow process.
__________________
2014 Jay Flight Swift 198RD
2008 Chevy Silverado 2500 6.0 HD LT
1971 Brentwood Continental 17í TT (2005-14)
TAK14Swift is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 12:15 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.