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Old 10-18-2019, 07:47 PM   #1
Roadtravelers
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roof info needed

What is the roof underlayment made of ? how thick? and what is the roof trusses made of? on 331RL.
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Old 10-19-2019, 07:57 PM   #2
MARK A
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The roof is sheathed with a 3/8" OSB and unless they changed the trusses are stamped from sheetmetal.
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Old 10-20-2019, 07:17 AM   #3
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New Montana’s have wood trusses. Didn’t go through the HC plant.
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Old 10-20-2019, 12:57 PM   #4
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Picture of roof. Not sure what model. It was in the Montana plant tour. Hope this helps.
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Old 10-20-2019, 02:06 PM   #5
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Is this a HC331RL roof?? I have been told everything now is aluminum trusses. thanks
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Old 10-20-2019, 03:16 PM   #6
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The picture is what we saw in September at the Rally tour.
There’s a YouTube video with Mark Krohl giving the tour and he says that they tried the stamped trusses but have gone back to wood.
The reason was for s better attachment of decking.
Again that was the Montana factory not the HC
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Old 10-22-2019, 06:48 PM   #7
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When did they switch to wood trusses?
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Old 10-22-2019, 07:26 PM   #8
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I finally got the answer from Keystone today My trusses are made of Aluminum. Thanks for all the input.
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Old 10-22-2019, 09:39 PM   #9
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I'd heard that, that's too bad.



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Old 10-23-2019, 08:00 AM   #10
Roadtravelers
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Mark Why do you think that aluminum trusses are bad?
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Old 10-23-2019, 09:49 AM   #11
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Quote:
Originally Posted by Roadtravelers View Post
Mark Why do you think that aluminum trusses are bad?
I was replying to the post stating that Montana has changed to wood trusses. I am a fan of metal trusses, they don't ROT.


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Old 10-23-2019, 12:21 PM   #12
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Quote:
Originally Posted by MARK A View Post
I was replying to the post stating that Montana has changed to wood trusses. I am a fan of metal trusses, they don't ROT.


Mark

Just another example of going cheap. I'm amazed that they went this far though. I know mine are aluminum from when I mounted solar panels on the roof, but wood toothpicks??? Looks like not even 2" by 2".
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Old 10-23-2019, 02:21 PM   #13
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Very sad. I don’t think I will be buying any 5th wheel with wood trusses if I can help it.
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Old 10-23-2019, 03:11 PM   #14
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roof trusses

In the youtube video "Keystone Montana factory tour" from April 2019 - at the 31:13 mark - the Keystone guy shows the current wood trussed roof and says they changed back to wood trusses to get better connection of the wood roof deck to the trusses. He says that in the past they have used aluminum trusses, then stamped steel, then carbon fiber, and now they have gone back to wood.

I looked back thru some of the archived brochures on the Montana website and this is what I found...
2001 - 2004 - 5" welded aluminum trusses
2005 - 2012 - fabricated galvanized steel trusses
2013 - 2018 - brochure refers to them at "arched rafters". In a youtube factory tour video from 2011, the trusses look like aluminum. The pic below is a screen shot from the 2011 tour video. There might be some disconnect between the brochure info and the pic below...beats me.
2019 - 2020 - wood trusses...I suspect the flat ceilings that came in with the 2019 models were partially a result of incorporating the wood trusses.

I only looked at "Montana" archived brochures...not High Country or Big Sky etc. etc. Those brochures may state a different roof construction.
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Old 10-28-2019, 06:20 AM   #15
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what year is your 331RL ?
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Old 10-28-2019, 07:47 AM   #16
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it is 2020 model I found out the trusses are made from aluminum and the decking is OSB.
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Old 10-28-2019, 07:58 AM   #17
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Back before the Great Recession Teton Homes ?the exact name, made luxury 5ers that were all wood frame and claimed it was better than aluminum. Who knows?
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Old 10-28-2019, 08:02 AM   #18
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Thanks ours is a 2019 and I think they are aluminum also
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Old 10-29-2019, 07:27 AM   #19
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If you wont to know what kind of trusses are in your camper, take the interior part of your skylight down. Easy to do. The skylight bridges between two trusses and can easily be seen with skylight down.
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