Sunline RV Forum
Sunline User Photos

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

Join Sunline Club Forums Today

Thread Tools Search this Thread Display Modes
Old 09-21-2017, 04:16 PM   #1
Junior Member
O Canada's Avatar
Join Date: Jul 2012
Location: Alberta
Posts: 26
SUN #4035
O Canada is an unknown quantity at this point
roof vent cover

Had a bit of a (mis)adventure last week. Left home with two MaxxAir brand roof vent covers on my T1950 and when I arrived in Banff there was only 1/2 of the rear one remaining. The front one was completely gone. I thought maybe I had struck a bird or something but there was no evidence of that. Roof doesn't look hail damaged in any way. The remainder of the rear cover was somewhat brittle. Long story short, these things have a limited life span.

Its strange that they both disintegrated on the same trip. Maybe the front one caught the back one on its way bye??? I have replaced them both now which was quite easy as the mounting brackets and bolts were all still there. Another coincidence, mine where 7 years old and the stickers on the new one's say they have a 6 year limited warranty. If you have these roof vent covers give them a check.

O Canada is offline   Reply With Quote
Old 09-22-2017, 02:31 PM   #2
CapsFan's Avatar
Join Date: Aug 2017
Location: Washington, D.C.
Posts: 76
SUN #9721
CapsFan is an unknown quantity at this point
I bought two just this started with the vent cover (not the Maxxair). I looked up and part of it had crumbled. That is sort of a good thing that lead to the discovery that the Maxxair had a notch missing too. We got replacements for both vents and Maxxairs. Today #2 is being added. We just got the really great 2003 T1950 about a month ago and we are steadily getting some great advice from this forum for our update list.

I am glad you mentioned this for others to see. It would be awful to find yourself in the rain and two big leaks in the roof.

CapsFan is offline   Reply With Quote
Old 09-28-2017, 10:50 AM   #3
JohnB's Avatar
Join Date: Nov 2006
Location: Ohio
Posts: 9,081
SUN #89
JohnB is an unknown quantity at this point

The Maxx Air covers are a really good investment. They are also made from a better plastic to hold up to the UV rays of the sun. However, I too have found that if they are left untreated in their natural state, after 6 to 10 years they too will become brittle if the camper live outside all the time. The bolt slots are the first to crack and then the cover can fly off. Having had older and now newer Maxx Air covers, I have seen Maxx Air has changed the mounting slots a little to help this cracking issue the way they mold the slot. The new ones have a reinforced area by the slot were the older ones (year 2003 - 2004 ish or older vintage) do not. This added reinforcement helps this cracking issue.

I have found that when you buy them new (or even when used and you acquired them) that spraying the inside and the outside of the cover with a 303 UV protectant when installing them can really help extend the life. Also spray the vent lid and the gasket under the vent lid while you are at it.

They sell 303 in a lot of places. Amazon, Walmart, Auto parts stores etc. I use it on all plastic, vinyl, roof caulking, the rubber roof on the camper. It for sure helps extend the life before the brittleness comes. Apply each time I wash the roof to the outsides of all things up there.

On the Maxx Air covers, I also have found that the cracking of the mounting slots is aggravated by the tightening of the mounting bolts. While you need to tighten them enough to not come loose, if they are over tight they create a stress point were the splits will first start. I have found this now on several of the campers I have repaired and my own original covers. To help combat this issue, I use this mounting method.

1. Buy, 4 extra 1/4-20 stainless full hex nuts per cover.
2. Place the flat washer against the slot provided by Maxx Air.
3. Gently tighten the Maxx Air provided nut against the flat washer. This "gently" means, take out all the play in the joint and then only a little more tension. This is enough to hold the cover from moving but not enough to prevent nut backing off under vibration.
4. Add the 1/4" lock washer on top of the nut in step 3.
5. Add your second added 1/4-20 full nut on top of the lock washer. Using a wrench on the bottom nut to hold it from moving, fully tighten the top nut against the lock washer. This is a double nut with a lock washer in the middle setup. This anti vibration mounting method will not come loose and will not put extra pressure on the plastic trying to keep the nuts from comeing loose. This is a very old machinery method to keep fasteners from coming loose under high vibration.

See this pic of what I described above. I have been using this now for 9 years and between the 303 and the double nut setup, no cracks and no brittleness has been seen.

Hope this helps

Current Sunlines: 2004 T310SR - Fern Blue, 2004 T1950 - Fern Blue, 2004 T2475 - Nutmeg
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
Old 09-28-2017, 03:35 PM   #4
Senior Member
264SRinPA's Avatar
Join Date: Sep 2006
Location: Pennsylvania
Posts: 492
SUN #67
303 protectant also does wonders for the tires
Mike & Roz
2018 Grand Design 315RLTS
2013 Ford F-350 Lariat PSD/CC/LB/FX4
Sunlines= '06-2075, '06-264SR
264SRinPA is online now   Reply With Quote

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
Anyone ever lost a roof vent cover? 02 WS6 TA Sunline Community 5 08-18-2014 05:37 AM
Need 24 Inch Roof Vent LID / Cover Split Sunline Community 3 11-07-2013 07:43 PM
Refrigerator roof vent cover Firecat21 Repairs and Maintenance 2 06-29-2013 07:22 PM
Roof vent cover shattered Galaxiedriver Sunline Community 5 07-11-2011 07:55 PM
Dometic Fridge Roof Vent Cover Trailblazer Repairs and Maintenance 4 07-12-2010 08:34 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:10 PM.