Forum Discussion
ron_dittmer
Feb 04, 2014Explorer II
My thoughts & input.
A slant of 2" per 10 foot is normal practice for a concrete garage floor. An outdoor concrete pad for a motor home, I recommend 6" per 10 foot which will still work fine for the fridge. It is aggressive enough for water run-off of a flat roofed motor home that may develop a sag. You also want assurance that the water will run off the pad itself assuming there will be a little settling the first few years. You don't want water puddles under the rig, and especially not under the tires.
The draw-back to 6" per 10' is that walking around and sleeping inside, you will feel the slope. I don't know how you plan to park the rig to the slope, but sloping from a sleeping person's head downward to their feet would be comfortable if anyone needs to sleep in your motor home while at home. You could reduce the slope to 4" per 10' if the rig has a domed roof, but you really need to be sure the aggregate under the pad is very solid.
Since you are making a concrete pad for your rig, don't make the pad only to accommodate the motor home tires. Make it large enough so the entire rig is over the pad with a foot or more to spare. Then seal the concrete with a good industrial sealer. This will protect the under-body from ground moisture, and you will be able to comfortably cut the grass around the rig without fear of hitting it.
A slant of 2" per 10 foot is normal practice for a concrete garage floor. An outdoor concrete pad for a motor home, I recommend 6" per 10 foot which will still work fine for the fridge. It is aggressive enough for water run-off of a flat roofed motor home that may develop a sag. You also want assurance that the water will run off the pad itself assuming there will be a little settling the first few years. You don't want water puddles under the rig, and especially not under the tires.
The draw-back to 6" per 10' is that walking around and sleeping inside, you will feel the slope. I don't know how you plan to park the rig to the slope, but sloping from a sleeping person's head downward to their feet would be comfortable if anyone needs to sleep in your motor home while at home. You could reduce the slope to 4" per 10' if the rig has a domed roof, but you really need to be sure the aggregate under the pad is very solid.
Since you are making a concrete pad for your rig, don't make the pad only to accommodate the motor home tires. Make it large enough so the entire rig is over the pad with a foot or more to spare. Then seal the concrete with a good industrial sealer. This will protect the under-body from ground moisture, and you will be able to comfortably cut the grass around the rig without fear of hitting it.
About Motorhome Group
38,705 PostsLatest Activity: Jan 22, 2025