Farmerkev
Illinois
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Joined: 04/04/2007
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CSpenceFLY wrote:You will notice that most that said it was a bad idea did not give a reason why. I could say driving on the interstate is a bad idea but that doesn't make it so. I have a one piece fiberglass/gelcoat roof and have been looking into Line-X. I saw a show a few weeks ago about all of the things they are doing with their technology,blast proofing buildings and stuff like that. I may have my whole RV sprayed.it could do wonders in a crash.
1- it's only as good as what it's sprayed on and it isn't going to keep the EPDM glue from letting go from the roof.
2- it'll make the job of replacing vents/skylights even harder if it's sprayed over the caulking material.
3- if it isn't sprayed over the caulking material you'll still have the caulking that needs attention.
I love the stuff and wont have a pick up truck without it. Did wonders for a utility trailer too.
I still think it's a bad idea on the roof of an rv.
You're more than welcome to spray it on everything you own from your home fiberglass bathtub to your wife. I think those are bad ideas too.
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Motor City Swagman
Detroit, Michigan/Florida
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IMHO it is a bad idea don't do it. Although it may work great as a truck bed liner that is a completely different application than your roof. All the Rhino liners I have seen are black and that would surely absorb enormous amounts of unwanted heat. Who knows what the sealing characteristics of Rhino liner material are you could end up with leak problem. And finally is Rhino liner material compatible with the other material your roof is made out of. I have not heard of any other people or companies doing this.
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50pascals
rochester, ny
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Joined: 01/10/2008
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You know this is a perfect case study of how materials get used in the wrong ways and end up with massive class action lawsuit type failures. The construction industry is full of these types of failures.
Here's the best reason not to use a polyurethane (thats the what Rhino and others are) material on your RV roof.
Ready, it's very simple......
Because spray applied polyurethanes have a good history of failure on buildings. On buildings that are not mobile, where the material was applied by licensed contractors to do roofing only. It is UV unstable and shrinks and has inherent stresses from curing that will cause it to do this.
This is great stuff in fancy colors and it will stick to anything and it is very abrasion resistant, and helps keep a wall together from a bomb blast. But that does not necessarily make it good roofing material.
Sure there's lots of anectdotal examples where it worked, but for how long? What was the substrate? What color was the material? In what climate zone?
If you have a rigid roof that is already watertight - like fiberglass. Then spray away because you don't need the watertightness. And this will add an extra layer of UV and abrasion protection for the fiberglass.
So beware of liquid miracle coatings, they have a near 100% track record of failure in the construction industry.
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Bumpyroad
Virginia
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Joined: 12/01/2005
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Farmerkev wrote:CSpenceFLY wrote:You will notice that most that said it was a bad idea did not give a reason why. I could say driving on the interstate is a bad idea but that doesn't make it so. I have a one piece fiberglass/gelcoat roof and have been looking into Line-X. I saw a show a few weeks ago about all of the things they are doing with their technology,blast proofing buildings and stuff like that. I may have my whole RV sprayed.it could do wonders in a crash.
1- it's only as good as what it's sprayed on and it isn't going to keep the EPDM glue from letting go from the roof.
2- it'll make the job of replacing vents/skylights even harder if it's sprayed over the caulking material.
3- if it isn't sprayed over the caulking material you'll still have the caulking that needs attention.
I love the stuff and wont have a pick up truck without it. Did wonders for a utility trailer too.
I still think it's a bad idea on the roof of an rv.
You're more than welcome to spray it on everything you own from your home fiberglass bathtub to your wife. I think those are bad ideas too.
I certainly would NOT spray it on top of the EPDM. that is the weak spot to begin with. and I certainly would NOT spray it over the caulking material/skylights etc. strip the roof down, cover it with plastic/rubber whatever the stuff is and replace the fittings. you will have similar to a fiberglass roof if you do it over plywood underlayment.
bumpy
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BigRabbitMan
Dixon, CA
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Joined: 07/02/2005
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50pascals wrote:
If you have a rigid roof that is already watertight - like fiberglass. Then spray away because you don't need the watertightness. And this will add an extra layer of UV and abrasion protection for the fiberglass.
This is an interesting thread for me. My coach has a one piece fiberglass roof that has no end caps or seams until half way down the side or to the top of the windshield. No leaks to fix.
But, after 32 years I am going to have to do something at some point to recoat the roof as the gel coat is disappearing and I am getting white streaks down the side of the coach.
I think I have three reasonable choices:
1. redo the gel coat (high labor and cost).
2. Paint the roof with limited life.
3. Have coated (stopping 6" short of the roof edge) with a thin, White Line-X Extra (not Rhino) coating to add a "sealing layer" to stop the degradation and make it less slippery than the gel coat or paint would be.
Your thoughts
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Bumpyroad
Virginia
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BigRabbitMan wrote:50pascals wrote:
If you have a rigid roof that is already watertight - like fiberglass. Then spray away because you don't need the watertightness. And this will add an extra layer of UV and abrasion protection for the fiberglass.
This is an interesting thread for me. My coach has a one piece fiberglass roof that has no end caps or seams until half way down the side or to the top of the windshield. No leaks to fix.
But, after 32 years I am going to have to do something at some point to recoat the roof as the gel coat is disappearing and I am getting white streaks down the side of the coach.
I think I have three reasonable choices:
1. redo the gel coat (high labor and cost).
2. Paint the roof with limited life.
3. Have coated (stopping 6" short of the roof edge) with a thin, White Line-X Extra (not Rhino) coating to add a "sealing layer" to stop the degradation and make it less slippery than the gel coat or paint would be.
Your thoughts
of the three, I'd go for Line-X.
bumpy
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Camelot Mike
New Jersey
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Joined: 07/17/2005
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SCHARLEY wrote:I have wondered for years why that stiff couldn't be used for residental roof applications. I have seen it used on the roof of a geodesic dome where they couldn't stop leaks, they did it in 1996 and it's still doing great.
Mike, Wendy, and our mongrels, Nellie, Sarah, and Tristan.
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treecounter
Bend, OR. USA
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Joined: 04/15/2004
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Interesting that this comes up and with a Safari. We are having leak problems with our 03 Friendship. It has a Fiber glass roof and leaks where the roof and sides come to gather. Our service shop said that when that type of roof gets about ten years old they crack on some Safari's He said they do the bed liner thing and it works very well.
Treecounter
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CSpenceFLY
Macon,Ga
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Joined: 06/12/2006
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It will not stop the leaks. You will still need to seal the seams.
"You're lucky to be alive my friend."
Quote from the "Do it yourself police" and many others that have known me.
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Bumpyroad
Virginia
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CSpenceFLY wrote:It will not stop the leaks. You will still need to seal the seams.
If you Line-X from roof down over the seams it shouldn't.
bumpy
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