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06-09-2023, 12:50 PM
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#1
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Senior Member
Join Date: Jul 2016
Posts: 251
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How to work above the coroplast?
I want to inspect and possibly do a mod or 2 in the underbelly of my Cougar. But I'm wondering how to get above the coroplast without damaging it.
Does it roll up or something? I sure don't want to remove the whole thing. If I remove the screws in the back and maybe halfway up a side I can at least see what I want to do but I'd probably have to crawl on it to get in to work on it.
Any advice from those who have been in there?
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06-09-2023, 12:57 PM
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#2
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Senior Member
Join Date: Jan 2013
Posts: 861
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I had to pull my colorplast down to clean up and identify a hydraulic leak. To do that, I removed all the screws from the back, up the sides to right about where the axles were. I dropped it down onto cardboard to keep it from getting scrapped up and then worked by laying on top of it.
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John, Laurie & the 3 Schnauzers
2019 Newmar Bay Star 3609
Ford V10 - 24K Chassis
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06-09-2023, 02:54 PM
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#3
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Senior Member
Join Date: Jul 2016
Posts: 251
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Quote:
Originally Posted by Newmar2856
I had to pull my colorplast down to clean up and identify a hydraulic leak. To do that, I removed all the screws from the back, up the sides to right about where the axles were. I dropped it down onto cardboard to keep it from getting scrapped up and then worked by laying on top of it.
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Did it seem like it was flexible enough to roll up some?
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06-09-2023, 05:19 PM
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#4
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Senior Member
Join Date: Jan 2013
Posts: 861
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I would imagine it would roll up, but the diameter of the roll wouldn’t have fit above the axels.
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John, Laurie & the 3 Schnauzers
2019 Newmar Bay Star 3609
Ford V10 - 24K Chassis
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06-09-2023, 10:10 PM
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#5
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Senior Member
Join Date: Oct 2012
Posts: 1,185
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How to work above the coroplast?
It helps to be on concrete and use a creeper to roll around getting to all the screws.
If yours is one single piece it is difficult to manage. You may consider cutting a section and use a 1x2 to reinstall it.
Best to cut an inspection port (3 sided that you can stick your head into to see what’s nearby before you start cutting bigger pieces. (Ie, mine uses 4’x8’ panels).
Also the coroplast I have dealt with on a few rigs is very rigid/stiff and will not roll.
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Brian
2016 RAM 3500 6.7L DRW
2018 Chaparral 360IBL, Andersen Ultimate II hitch
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06-10-2023, 10:24 AM
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#6
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Senior Member
Join Date: Apr 2016
Posts: 913
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Quote:
Originally Posted by Squantobon
Did it seem like it was flexible enough to roll up some?
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On a trip to Florida, the coroplast on my trailer detached from the front. When I pulled into a campground that day, it was wrapped over my trailer axles. I pulled it completely off using a claw hammer and some side cutters.
I was able to roll up the entire 26' of it, tie it up with some rope and stick it into the back of my truck. The roll fit under the tonneau in the bed. I still have the original stuff rolled up, manufacturer replaced it under warranty using screws with larger washers. I then got some Eternabond and ran a strip across the edges and put squares over all the screws.
There is one direction where it should roll up easily, turn it 90 degrees and it will not roll. Depends on which direction the "ribs" run. Just don't make the roll overly tight. Coroplast is basically plastic cardboard.
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Al  SE Michigan, F-150 Plat SCrew, Flagstaff 26FKWS, ProPride
Tolerance will reach such a level that intelligent people will be banned from thinking so as not to offend the imbeciles. Fyodor Mikhailovich Dostoevsky, Russian Novelist
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06-11-2023, 10:59 AM
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#7
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Registered User
KZ RV Club
Join Date: Sep 2015
Location: Elephant Butte, NM
Posts: 1,197
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I pulled mine down to replace a valve and may need to replace a sheet of it. I bought a 4X8 sheet of white at the local big box home improvement stores $29. Seems none stocks black, not even the local RV shop.
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06-11-2023, 11:05 AM
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#8
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 30,496
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Most coroplast has no UV protection ; depending on the age of your RV , it may be to brittle to remove and reuse , so line up a supplier of possible replacement material prior to starting your project .
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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06-11-2023, 11:13 AM
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#9
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Senior Member
Join Date: Nov 2015
Posts: 25,568
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Remove the whole sheet...
Coroplast is like plastic cardboard
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I took my Medication today. HAVE YOU?
Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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06-11-2023, 05:40 PM
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#10
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Senior Member
Join Date: Apr 2022
Posts: 324
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Quote:
Originally Posted by Skip426
Most coroplast has no UV protection ; depending on the age of your RV , it may be to brittle to remove and reuse , so line up a supplier of possible replacement material prior to starting your project .
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If your coroplast is seeing much UV, I think you are doing something wrong lol.
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2021 Ram 3500 HO DRW Megacab 4wd 3.73
2022 Riverstone 42FSKG | Pullrite Superglide 2315
Airlift 7500XL Airbags w Wireless One Compressor
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06-12-2023, 10:47 PM
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#11
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Senior Member
Join Date: Jul 2016
Posts: 251
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Quote:
Originally Posted by darrellr
If your coroplast is seeing much UV, I think you are doing something wrong lol.
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Hahaha
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06-14-2023, 06:16 PM
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#12
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Registered User
KZ RV Club
Join Date: Sep 2015
Location: Elephant Butte, NM
Posts: 1,197
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Quote:
Originally Posted by darrellr
If your coroplast is seeing much UV, I think you are doing something wrong lol.
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That would be the rubber side up, not good. 
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08-14-2023, 02:58 PM
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#13
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Senior Member
Join Date: Jul 2016
Posts: 251
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So now I'm looking closer and what I see they used to pin it up aren't exactly what I was expecting. Are these threaded like regular screws? If so, are they ok to reuse?
__________________
2023 Keystone Cougar 23 MLE "Emily Grace"
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08-14-2023, 06:39 PM
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#14
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Member
Thor Owners Club
Join Date: Dec 2020
Posts: 69
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Quote:
Originally Posted by Squantobon
So now I'm looking closer and what I see they used to pin it up aren't exactly what I was expecting. Are these threaded like regular screws? If so, are they ok to reuse?
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What you see are nails from a special nail gun. They can be removed by twisting with vice grips and then pried out. Should not be reused in my opinion.
I have removed some and then tapped the hole for a 10/32 screw.
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