Working on the roof of an ultra light.

[Jdaviso]

I'm looking at installing a Maxxair Fan on my Passport 292 SL. I understand these roofs are not made to support people on them. What is the best way to get up there to do this work? Is putting some thick plywood across the top good enough for a 200 lb person? How much weight can these roofs support before we need to worry about damage? TIA.

[mohead1]

I normally use a couple pieces of 3/8 plywood when i get on the roof to help spread the load some, and they are light enough to get up the ladder

[Gegrad]

Some thick plywood would work for a person of that size. Note you also want to put something soft down first, like an old sheet or towels, because the rough plywood could damage the roof membrane.

[mohead1]

Some thick plywood would work for a person of that size. Note you also want to put something soft down first, like an old sheet or towels, because the rough plywood could damage the roof membrane.Person of that size.....[emoji44].....im 240 and that 3/8 sheet works just fine....

[JRTJH]

An alternative to plywood is 1.5" or 2" rigid foam sheets. It's softer than plywood, smoother than plywood and won't damage the TPO roof membrane like plywood. It also is rigid enough to support your weight as well as 3/8 or 1/2 inch plywood. It's also a heck of a lot lighter to "push up a ladder".... YMMV

[busterbrown]

Best walkable options for Keystone's ultra lightweight trailers is what John suggested. I bought a 8x4' sheet of 2 inch thick polystyrene foam board. I cut it down into 4 equal 4×2' sections and duct taped the cut ends. I find that's the perfect size to negotiate the space on these roofs especially when squeezing between vents covers, ac units, and antennas. Extremely light to carry up and down the ladder and durable enough to spread a person's weight over several rafters.

The best part of using foam board is that its soft enough to slide over the roof membrane for reposition. No need to worry about damaging the rubber/TPO roof.

I just completed a roof inspection last week using my 4 year old foam boards. Used an entire tube of Dicor on suspicious beads of sealant, especially along the front cap edge.

I did a MaxxAIR install on my Bullet 3 years ago. Relatively easy upgrade. The hardest part is removing the existing sealant and butyl tape. Preparation is key. It took several hours for that process. The fan install was only a 30 minute task. The MaxxAir fan was one of our top 5 upgrades and mods.

[Jdaviso]

I'm going to get a styrofoam board for this. I have heard good things about these fans. If this is one of your top 5 upgrades, what others do you recommend?

[busterbrown]

I'm going to get a styrofoam board for this. I have heard good things about these fans. If this is one of your top 5 upgrades, what others do you recommend?

These are many of the mods I've done. Axles/springs, battery bank with master switch, DC inverter, and Shurflo water pump are at the top of the list.

Take a gander:

http://www.keystoneforums.com/forums/showthread.php?t=25484