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Old 10-08-2019, 01:05 PM   #1
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Model: Quantum RW28
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THOR #15031
Roof Bubbling

So this weekend I went up on my roof and noticed a few things. First, when laid, the rook does not seem to be straight. Second, there seem to be bubbles on one corner, third, there are deep cracks in some of the bonding material. A Thor rep said this is normal and should be found in a annual inspection for maintenance. I say the rig is only 5 months old and i don't think this is normal.

Any thoughts?

Jeff
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Old 10-08-2019, 01:44 PM   #2
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The bubbles are just poor workmanship but probably no cause for concern. The cracks in the lap sealant is indeed why you need to inspect and reseal at least every year with self-leveling lap sealant (Dicor is one brand) and why Thor only warrants the roof installation for 90 days.
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Old 10-08-2019, 02:21 PM   #3
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I got tired of constently maintaining the dicor lap sealent on these joints...
I removed the dicor sealent and put eternabond tape over on the front and back joints.
Took me a few hours but no more maitinence...
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Old 10-08-2019, 09:24 PM   #4
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Quote:
Originally Posted by jeffpiercemagic View Post
So this weekend I went up on my roof and noticed a few things. First, when laid, the rook does not seem to be straight. Second, there seem to be bubbles on one corner, third, there are deep cracks in some of the bonding material. A Thor rep said this is normal and should be found in a annual inspection for maintenance. I say the rig is only 5 months old and i don't think this is normal.



Any thoughts?



Jeff


It certainly could be neater but I donít think this is abnormal or that it will cause any problem. Roof seals need to be addressed every two or three months. There is a lot of flex in an RVs structure and the roof takes a lot of heat and UV. There is a reason Thor and other manufacturers tell you to service sealing at least quarterly and only warranty them for 90 days. Dealers donít tell you this or stress it enough when you buy but leaks can be quite subtle and are easily overlooked. They are common though and very damaging. Personally, Iím on my roof with fresh dicor at least every other month. Windows and side penetrations too!
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Old 10-08-2019, 09:43 PM   #5
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Originally Posted by Mousemate View Post
I got tired of constently maintaining the dicor lap sealent on these joints...
I removed the dicor sealent and put eternabond tape over on the front and back joints.
Took me a few hours but no more maitinence...

I just picked up a 2020 Magnitude. I think I am going to put Eternabond on all of the joints right out of the gate.

I'm just trying to decide if I want to pull up the Dicor or just tape over it since it is fresh and will be protected from the weather.

How hard was it to remove the Eternabond and what method did you use so as not to damage the roof?
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Old 10-08-2019, 09:48 PM   #6
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Quote:
Originally Posted by jeffpiercemagic View Post
So this weekend I went up on my roof and noticed a few things. First, when laid, the rook does not seem to be straight. Second, there seem to be bubbles on one corner, third, there are deep cracks in some of the bonding material. A Thor rep said this is normal and should be found in a annual inspection for maintenance. I say the rig is only 5 months old and i don't think this is normal.

Any thoughts?

Jeff

I agree with the general thoughts that this is poor workmanship is more cosmetic than anything else. The TPO is one piece and it looks like it was just not put on evenly.

I would not walk on the areas where it is bubbled up in cold weather because the TPO may be more brittle and I would not want to risk causing it to crack.

I would go the Eternabond tape route over continually maintaining it with Dicor. Depending on your weather, usage, etc., you will have to be inspecting it on a regular basis and fixing areas of sealant otherwise.
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Old 10-08-2019, 10:08 PM   #7
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Another vote for poor workmanship on the roof installation, my 2018 is similar. I clean my roof twice a year and do the dicor refresh. I always find a crack or ten and have been thinking about the eternabond. Does every speck of dicor have to be removed before applying the tape?
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Old 10-08-2019, 10:27 PM   #8
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Originally Posted by Lt Keefer View Post
Another vote for poor workmanship on the roof installation, my 2018 is similar. I clean my roof twice a year and do the dicor refresh. I always find a crack or ten and have been thinking about the eternabond. Does every speck of dicor have to be removed before applying the tape?


I donít see any reason to remove the old sealant before applying the tape. I think the tape would be quite difficult to remove. I havenít considered doing this but I have wondered a time or two why they donít apply this stuff at the factory.
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Old 10-08-2019, 11:13 PM   #9
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I donít see any reason to remove the old sealant before applying the tape. I think the tape would be quite difficult to remove. I havenít considered doing this but I have wondered a time or two why they donít apply this stuff at the factory.
Cost
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Old 10-09-2019, 03:03 AM   #10
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I removed the dicor so that the tape had over a inch or two on each side of the moulding. I think I used the 6" tape.
I used a heat gun on the dicor and it came right off . The most time was installing the new tape and making sure I got it all rollered down.
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Old 10-09-2019, 11:46 PM   #11
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Can you take a picture I would like to see the finish sounds like good idea
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Old 10-14-2019, 07:48 PM   #12
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Can you take a picture I would like to see the finish sounds like good idea
Sorry for taking awile ...was away this past weekend and the internet was poor.
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Old 10-14-2019, 09:22 PM   #13
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It is one of the first things I do on all the RV's I have had is install Eternabond tape on the front and rear joints. I have never removed the lap sealant though and no leaks at those two joints, but have other places oh yeah. I do clean the lap sealant with paint thinner followed up with alcohol or other non residue solvent and let dry before installation of tape.
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Old 10-17-2019, 01:39 AM   #14
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That is unbelievable. I would think it is a repair. You got this new from a dealer? I have a 35' Thor, 1997. I just removed the epdm and replaced all of the wood as well as added more 1"x1" cross supports. I then installed a whole new piece of rubber the whole length of the coach. It was my 1st time doing this. It looks great. I would be ashamed if my roof membrane had turned out like that. Wonder if there may be signs that it was a repair. The factory would not apply that much sealant as far as I know. I say this only because I am sure to paid a good dollar for a new coach. I would see if an independent thought it might be a repair. You may have some recourse. $
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Old 10-17-2019, 03:44 AM   #15
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That is unbelievable. I would think it is a repair. You got this new from a dealer? I have a 35' Thor, 1997. I just removed the epdm and replaced all of the wood as well as added more 1"x1" cross supports. I then installed a whole new piece of rubber the whole length of the coach. It was my 1st time doing this. It looks great. I would be ashamed if my roof membrane had turned out like that. Wonder if there may be signs that it was a repair. The factory would not apply that much sealant as far as I know. I say this only because I am sure to paid a good dollar for a new coach. I would see if an independent thought it might be a repair. You may have some recourse. $
Based on my roof, this is not a repair just another example of Thor's poor quality.
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Old 10-17-2019, 06:48 PM   #16
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roof

Mine is the same way. Thor told me that it is not glued on the outside edges to allow for movement as you drive the rig. After all it is a moving earth quake.
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Old 10-18-2019, 12:21 AM   #17
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Poor workmanship for sure, but unfortunately not surprising. Just learn more about your rig and do the inspections as you have been. I second Eternabond.
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Old 10-18-2019, 03:17 AM   #18
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Had the same issue with a 2005 Coachmen Aurora. Made the mistake of not inspecting the roof prior to taking delivery. Discovered it the first time I climbed up to clean the roof. I took pictures and showed them to a local RV repair facility who told me it was a common issue on all brands. Once the adhesive is applied to the roof there is a limited time to roll on the EPDM or TPO. Air can get trapped or wrinkles develop as the material is applied and many times it cannot be peeled back in time to reapply it. I lived with the wrinkles and bubbles for 18 years with no problems. It’s mostly a cosmetic problem.
I also applied Etrnabond at the front and rear caps and roof joints. Best mod I made before opting to downsize. This is my 4th M/H from 4 different manufacturers including Winnebago, Fleetwood, Coachmen, and now Thor and all had problems small and large.
I once asked a RV service tech if spending more on a coach would result in fewer problems and his response was “million dollar coaches have million dollar problems, be happy with what you have”.
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Old 12-31-2019, 02:03 AM   #19
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Originally Posted by jeffpiercemagic View Post
So this weekend I went up on my roof and noticed a few things. First, when laid, the rook does not seem to be straight. Second, there seem to be bubbles on one corner, third, there are deep cracks in some of the bonding material. A Thor rep said this is normal and should be found in a annual inspection for maintenance. I say the rig is only 5 months old and i don't think this is normal.

Any thoughts?

Jeff
I have the exact same bubble problem on my roof after I went up this weekend to inspect it! I have a 2019 Thor Four Winds 28z and it's less than 9 months old. Very disappointing!
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Old 12-31-2019, 02:56 AM   #20
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I used Eternabond on an older RV roof and it works great, for extra seal tight protection I used Dicor lap sealant on all the edges of the Eternabond tape.
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