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Old 01-08-2006, 11:25 AM   #1
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On my Sunnybrook I have a 1/8" plastic underbelly which also holds up the floor insulation. It has severly fractured, probably due to road debris, and needs to be replaced. My question is: has anyone used something such as 1/4" treated plywood which seems to be sturdier than the original material. I'm having trouble finding something comercially available from trailer suppliers. Thanks, Bill
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Old 01-08-2006, 11:25 AM   #2
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On my Sunnybrook I have a 1/8" plastic underbelly which also holds up the floor insulation. It has severly fractured, probably due to road debris, and needs to be replaced. My question is: has anyone used something such as 1/4" treated plywood which seems to be sturdier than the original material. I'm having trouble finding something comercially available from trailer suppliers. Thanks, Bill
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Old 01-08-2006, 02:53 PM   #3
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Mine has what appears to be 1/2" waferboard wrapped in a rubberized fabric.

I have a section on mine that needs replaced, too, but haven't gotten around to it.

Perhaps some marine grade plywood backed up by deck paint...
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Old 01-09-2006, 03:11 AM   #4
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I recently had to take down a commercial sign at the front of a business. I was surprised to see that the sign was painted on a 4x8 sheet of aluminum like corregated materiel, stiff as plywood, strong and easily cut with a saw. It was about 1/8th inch thick. I am now using these as hurricane boards here in Florida. Check out a sign business and have a look. It is light weight too.
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Old 01-12-2006, 05:43 AM   #5
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grandslam, I have been doing this to my trailer with the corrigated plastic. Although my under carrage was completly open to begin with, I decided to enclose it to protect and help insulate. I have a place here in Michigan that has exactly what they use for this. If you want to contact them and talk to them about it. I had the same problem trying to find a place that had this stuff and got lucky.
The sheets are 4 X 8 feet and about an 1/8 inch thick. When I put the screws in to hold it up I also used a 1" fender washer to give more support around the screw head. Any ways, the info is;
SOROC Plastics
4349 S. Dort Hwy
Burton MI.
810-743 5920
This stuff is pretty light so I dont expect it would cost much to ship it. Also I just got the plain white stuff cause it was like $7.00 and some change a sheet.Good luck
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Old 01-20-2006, 07:58 AM   #6
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I had to repair all the frame crossmembers on our '86 Monitor (Holiday Rambler) about 2 years ago and so I had to rip off all the aluminum belly sheathing. I used galvanized sheet metal to replace it and it worked perfect and was easy to put on. You can get 4x8 sheets of galvanized sheet metal at any place that manufactures HVAC ductwork. The individual sheets are joined together with "S" clips that they also use for ductwork. The "S" clips come in 8' lengths if you ask for them uncut. The "S" clips would probably work to seam up to the 1/8 plastic underbelly but it will be a tight fit. Try to avoid scratching the galvanized sheetmetal to reduce chances of rusting. I used regular old self-drilling sheetmetal screws to fasten it to the bottom of the frame rail.

-Deon
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