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Old 04-04-2014, 11:20 AM   #15
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Winnebago has been using fiberglass roofs for years and I'm not sure I've ever heard of any of the cracking due to flexing. Some have come dislodged on the edges in certain circumstances but, in terms of total amount of units made, it's miniscule.
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Old 04-04-2014, 12:40 PM   #16
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Winnebago has been using fiberglass roofs for years and I'm not sure I've ever heard of any of the cracking due to flexing. Some have come dislodged on the edges in certain circumstances but, in terms of total amount of units made, it's miniscule.
Scott
The caulk along the edges allows some movement. When the caulk dries out, it has little give left and the edge of the fiberglass roof may pop out of the groove.
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Old 04-04-2014, 12:53 PM   #17
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Because a manufacturer fabricates fiberglas roofs is far different from a DIY applying fiberglas to the plywood underlayment on their RV. Growing up around wooden boats in the '50's and '60's, I saw many DIY yachters try to use the 'new, low maintenance, everlasting fiberglas and resin' to coat the hulls, roofs, and decks so they wouldn't have to caulk and paint them anymore. Didn't work like they hoped, cost WAY more to remove and repair.
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Old 04-04-2014, 06:18 PM   #18
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Winnebago has been using fiberglass roofs for years and I'm not sure I've ever heard of any of the cracking due to flexing. Some have come dislodged on the edges in certain circumstances but, in terms of total amount of units made, it's miniscule.
Scott

you well find on most RV that have a fiber roof are under 25 feet long thats like any thing else
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Old 04-04-2014, 06:20 PM   #19
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This is a very good point. Fiberglass is rather rigid, and the flexing of the RV may cause cracks. I also used to work in fiberglass. It looks easy, but it can be very tricky. A lot of garage-shops sprang up in the 1960s, but most of them quickly went out of business. There used to have a saying in the fiberglass industry - "Loose your a** in fiberglass."

Tiffin Motorhomes is a good example of the kind of trouble you can get into with fiberglass roofs. They had been using fiberglass on the flat part of their roofs for several years with no problems. The curved edges where the roof meets the sidewalls were formed aluminum.

Then around 2007, they went to a 1-piece molded fiberglass roof which combined the edge radii and the flat part of the roof. Shortly thereafter, owners started experiencing cracks not only on the edge radii, but all the way across the roof in some cases. Tiffin tried reinforcing the edges with extra layers of glass, but it didn't help. That made the roof more rigid, which have made matters worse. They finally came up with a tougher (somewhat more flexible) resin that seems to have solved the problem.

DIYers don't have much choice when it comes to materials, and they can't afford to hire polymer chemists as consultants when they run into problems. I would stick with rubber or TPE.
all so for got to add on some RVs why the windshield likes to pop out
some like to think its a big TV
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Old 04-04-2014, 06:37 PM   #20
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Can you pm me the source of the TPO roofing? My MH will need roofed this summer.

sorry i found it at a mom and dad RV store that is no longer around

a roofing place that dos home type installs and they well have alot of left over parts here and there from big 40 foot be 40 foot cuts

ebay as well

9 feet wide buy how ever long your RV is

i used the same glue to install it as EPDM used 80$ a can i think
on to a play wood roof

clean it right
use the right chalking there is a really good 2 part chalk out there
CW loves to only stock part 1 and have to order in part 2

make sure what ever chalk you work with is for TPO

if you where here FL i would help you install and fix all of your roof







old roof after FIRE





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Old 04-05-2014, 09:16 PM   #21
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you well find on most RV that have a fiber roof are under 25 feet long thats like any thing else
Huh??????
What is that supposed to mean? Winne and Itasca have 40' units that have fiberglass roofs. They've had them for years. And, as stated, while there are "some" that have had the complete fiberglass roof, or a portion there of, separate from the seams on the sides, their numbers are by far, miniscule in terms of the amount of total Winne and Itasca units made with this technology.
Scott
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Old 04-06-2014, 08:17 AM   #22
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Huh??????
What is that supposed to mean? Winne and Itasca have 40' units that have fiberglass roofs. They've had them for years. And, as stated, while there are "some" that have had the complete fiberglass roof, or a portion there of, separate from the seams on the sides, their numbers are by far, miniscule in terms of the amount of total Winne and Itasca units made with this technology.
Scott
I ordered a fiberglas roof on our 43 ft newmar as I was sick of dealing with the rubber roofs that we've had in the past. It did cost a few extra $$'s
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Old 04-07-2014, 12:03 AM   #23
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I have discussed this with an older well experienced fiberglass man who has laid up 60ft boats. I have thought about glassing my roof for a while now so I asked him about all the concerns listed. He suggested laying a thin layer of foam on the ply roof to allow for flex and mostly for heat expansion. Then using mechanical fasteners and caulk around the perimeter alowing for movement. The roof needs to be layed up in one step as new glass will not chemically adhere to old glass. Use one layer of woven cloth and one layer of "chopped" glass fabric. Use as little resen as possible, just enough to wet the cloth. Polyester resen is just as strong as epoxy so save your money and get the polyester. The resen can be had for less money at a shop that does fiberglass work, just bring your own bottles. The liquid laundry bottles work the best. When the roof has cured for a day you can sand with 80grit paper ,not much sanding please!! Then apply a coat of bondo and sand to a smooth finish. Prime and paint. Do not skimp on the paint as it will be almost impossible to lay up glass without a mould and gel coat layer to get a leak free class layer.
I think I will try mine this summer and have checked on supplies and found I can do the job for about $900.
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Old 04-07-2014, 12:21 AM   #24
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The seamless roof

I haven't used this. Here is the information. RV Roof Armor. Premium Liquid Applied Rv Roof System. Lifetime Material &Labor Warranty. Only available through Certified Dealers. Toll Free 1-855-RV-Armor. 1-855-782-7667. Lee Thaxton Cell:941-993-7712. lee@rv-armor.com www.RV-Armor.com He did a presentation at a Good Sam Rally.
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Old 04-07-2014, 12:50 AM   #25
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My coach came with a two piece aluminum roof. We got caught in two hailstorms with golf ball size hail. The storms did a number on the roof. Iron Horse RV in San Antonio TX made repairs and covered the new roofing with a bed lining like material called Vortex. Has held up well in the 4 years since it was applied. It has also cut down on the chalking and black streaks on the sides of the coach.

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Old 04-07-2014, 06:12 PM   #26
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Huh??????
What is that supposed to mean? Winne and Itasca have 40' units that have fiberglass roofs. They've had them for years. And, as stated, while there are "some" that have had the complete fiberglass roof, or a portion there of, separate from the seams on the sides, their numbers are by far, miniscule in terms of the amount of total Winne and Itasca units made with this technology.
Scott

what i was trying to say more is he should not edit what he has from what it was made for

yes there are some out there that are 40 feet long but the windshield box is made of still

and the ones that are not you see from time to time on here with windshields poping out thinking its a to big of a TV over head

under 25 feet units are more the RV on truck body with stock truck body
or has the falls in side to hold every thing from moving

.. fiber is RV talk for fiberglass just like ..gen set ..toad.. 5er
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Old 04-10-2014, 08:56 AM   #27
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what i was trying to say more is he should not edit what he has from what it was made for

yes there are some out there that are 40 feet long but the windshield box is made of still

and the ones that are not you see from time to time on here with windshields poping out thinking its a to big of a TV over head

under 25 feet units are more the RV on truck body with stock truck body
or has the falls in side to hold every thing from moving

.. fiber is RV talk for fiberglass just like ..gen set ..toad.. 5er
What??
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