Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Model Specific Forums > Sunline Slide Room Travel Trailers
Click Here to Login

Join Sunline Club Forums Today

Thread Tools Search this Thread Display Modes
Old 10-28-2021, 07:52 PM   #21
JohnB's Avatar
Join Date: Nov 2006
Location: Ohio
Posts: 11,729
SUN #89
JohnB is on a distinguished road
Originally Posted by melissaburn View Post
TNow, how do I insulate the area inside the camper where the slide and side-wall meet? There's a bigger gap on one side than the other, so it seems just a little crooked. I hope that's something I can ignore for now and just get it insulated for winter.
Hi Melissa,

Without seeing pics of the slide seal gaps you are referring too, it's hard to say if what you are seeing is normal or not.

As a generic answer, the slide room is "nominally" in the center of the camper slide wall opening. This creates a somewhat "nominal" appears that the gaps on the front and rear ends, and along the top of the slide are similar. Over time the gap can change a small amount and if you measure it, it can change by a small amount every time you open and close the slide room. There is play/excess clearance in the slide drive system to sort of let the slide room float back and forth, front to back.

There are also cases where the main frame rails flex/sag over time. This creates a somewhat parallelogram shape in the camper slide opening in the camper wall. This can create a wedge gap in slide gasket area.

And then there are times when a prior owner tried to adjust the slide room drive mechanism/slide drive, and did not do it correctly creating a wedge gap exists at the slide seals area. And sometimes after a lot of towing, the slide drive system may loosen up and drop down on one side, shifting the adjustment creating a gap difference in the slide seal area.

All that said, the rubber slide seals area forgiving for many mix ups or combinations of things not being exactly right. And there is a limit to where things mechanically bind up and they cannot cover over all things out of alignment. If things are up to 1/4" plus or minus from perfect center, that can be normal. If things are 1/2" or more plus or minus, that usually points to something not right. A 1/4" wedge gap top to bottom can be at the edge of normal. These are generic numbers, not hard and fast but close to what working slide systems have been at in the past.

If the slide seals are sealing up everything, There is not hard mechanical binding or rubbing, and you have the slide out all the time as you are using the camper, then that helps add to, things are usable even if they are not ideally in the nominal area of correct.

How to insulate that area, Sunline slides were not really made to be insulated in the rubber seals area. The rubber flap was the seal. If you are not moving the slide, you can be creative in adding some custom fit pink closed cell insulation board over that area inside the camper. The closed cell foam board is not affected by moisture. Making the fit tight helps on the drafts at the board edges. Something like this board. They make in in different thicknesses and lengths. Thicker insulates more.

You can cover the pink foam board maybe with contact paper to not look so bad once you fit it in place.

Hope this helps


Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote

battery jump, manual override, slide

« Radio help | - »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
I did it! I did it! got me a 1984 t1550! rootedmamma Introduce Yourself 5 02-18-2020 11:17 AM
Somebody tried to break in... Capt Skup Sunline Community 8 03-28-2013 09:50 AM
Spring Break April 2011 JB2004 Trips & Vacations 4 10-10-2010 07:30 PM
Saftey Chains and break away switch setup (with pics) JohnB Towing and Tow Vehicles 16 03-05-2008 09:53 PM
Break Away cable happycamper Sunline Slide Room Travel Trailers 6 08-27-2007 11:25 PM

» Featured Campgrounds

Reviews provided by


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

All times are GMT -6. The time now is 04:03 PM.