Roof Sheathing Material

[chuckster57]

I use Dicor self leveling. Apply completely UNDER the bracket, then screw down. After that completely cover the portion on the roof.

[Steve's 70-5]

If they used 3/4 inch plywood they would not be able to bend it to the roof slope

[JRTJH]

Originally Posted by Steve's 70-5

If they used 3/4 inch plywood they would not be able to bend it to the roof slope

Not without pulling the floor/sidewall screws out of the Styrofoam floors !!!

Light, Ultra-Lite and "Helium Technology" don't have anything that's "solid and 3/4" thick" anywhere in the construction... Check that 3/8" countertop backing that's covered with 1/16" "fake formica" and molded on the edges to make it appear to be 1.25" thick....

[bbells]

You don't need to screw it. I used perma bond roofing tape to hold mine on.

[Bill-2020]

Originally Posted by JRTJH

Go into the bathroom in your trailer, pull the 4 screws holding the plastic flashing around the vent fan. Once that flashing is down, you'll see 4 "TPO flaps" where the roof material was cut and stapled to the vent framing. Pull the staples from one of the flaps and lift it. You'll see the OSB roof decking used on your trailer. My guess is that it's either 1/4" OSB (if you do not have a roof ladder on your trailer) or 3/8" OSB (if you do have a roof ladder/walkable roof).

In either case, your "assumption" that the roof is 3/4" plywood is nowhere close to reality. At best, it's half that thick, probably even thinner and it's OSB, not plywood.

Pull the vent flashing, you'll be able to see EXACTLY what's stapled to your roof rafters and "hidden" by the TPO membrane.

The 2020 239ML is a walkable roof, but no ladder (bean counters at Keystone probably omitted the ladder in favor of saving $). Heck, there isn’t even a bunk ladder inside for that matter! Some are rated for snow load if it's a Western edition As I understand. It’s a bit “Squishy” up there, especially near the front, otherwise just use common sense Walk easily and don’t use it as a sun deck.

[Ccrew]

Most of the panel manufacturers say that you should use Well nuts on the roof when it's OSB/TPO. It's what I used on mine.

[rlh1957]

WOW imagine the extra weight that installing 3/4" plywood up there. Costly for manf, unwieldy to handle on the line, and changes the weight and available payload. That's the way the handle more available payload numbers and saying a half ton can tow this stuff... Lite, Light, Shave more here, trim more there.

[JRTJH]

Originally Posted by rlh1957

WOW imagine the extra weight that installing 3/4" plywood up there. Costly for manf, unwieldy to handle on the line, and changes the weight and available payload. That's the way the handle more available payload numbers and saying a half ton can tow this stuff... Lite, Light, Shave more here, trim more there.

One manufacturer, not associated with Keystone (or THOR) builds a Styrofoam roof. It's built very similar to the "sandwich floor system" used by Keystone. A 1/8" luan panel, 3" Styrofoam and a 1/8" luan ceiling panel. All the ducting is "formed from sprayed foam" and there are "minimal trusses/rafters" in the assembly... They advertise that it cuts nearly 500 pounds from the trailer weight, allowing for smaller tow vehicles and greater cargo capacity"....

[sonofcy]

Originally Posted by levic900rr

Hey Team,

I picked up my new Passport 239ML recently and I am thinking my first project will be installing my solar panels on the roof. I'm assuming the roofing material is 3/4" plywood, so I don't need to worry about finding framing to screw to? Can anyone confirm?

Thanks!

Read the following to understand how the installers do it.
https://amsolar.com/diy-rv-solar-ins...edmounts?rq=3m double sided tape

[Frosty46]

No "Goop" is a great hand cleaner and stain remover from clothes. Comes in tubs and will not seal anything--------period. We old folks know these things,,,,,,, To "goop" would be to glob on heavy amounts-------I guess.

[flybouy]

Lowes has it. Google "Amazing Goop".

[JRTJH]

It seems like "GOOP" has entered the realm of "TRUCK" and similar words....

Everyone has a "version of truck" ranging from 1/4 ton to 10 ton (and larger) and then, there's the railroad "version of truck" that doesn't even have a steering wheel....

So "TRUCK" and "GOOP" are the same thing, well, at least in being significantly different but similar in being "so different" in some of its forms, all the while, maintaining a separate definition while being the same..... If you can't find your GOOP, just use your TRUCK, it's virtually the same thing, at least in some ways.....

To, Too and Two.... Where's Sesame Street when you need it most ???? (One of these things just doesn't belong here...…)