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Old 09-08-2019, 06:57 PM   #11
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My first thought was to tile the inclined shower floor. After watching a video of someone making a mortar bed for a tiled shower I wonder whether the shower floor could be made simply from epoxy mortar on top of plywood. The epoxy mortar could be carried a few inches up the walls to form a seamless 'pan'.
That's how I'm doing mine.......tilted piece of plywood, mortar, then an extremely thick rubber mat extending a couple of inches up the wall......then plywood walls overlapping the rubber. I was planning on two drains (one at each low corner), but I like your linear drain idea better....will be looking into that.
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Old 09-08-2019, 07:09 PM   #12
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Originally Posted by alpine44 View Post
My first thought was to tile the inclined shower floor. After watching a video of someone making a mortar bed for a tiled shower I wonder whether the shower floor could be made simply from epoxy mortar on top of plywood. The epoxy mortar could be carried a few inches up the walls to form a seamless 'pan'.
As long as it was lined with a rubber shower membrane it would work.
The linear drain is cosmetic, it still drains into a single round drain.
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Old 09-08-2019, 07:51 PM   #13
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...
The linear drain is cosmetic, it still drains into a single round drain.
The linear drain terminates into a round pipe but it creates a hidden 'ditch' along the entire width of the door opening that water cannot get across (unless the drain is totally clogged).

Before the idea with the linear drain I had to slope the floor away from the door
or have a ledge there to prevent the water from leaving the bathroom.
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Old 09-08-2019, 08:10 PM   #14
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As long as it was lined with a rubber shower membrane it would work.
...
I am going to frame the whole bathroom in plywood and fair the sharp floor to wall corners into a radius with epoxy putty and sand that smooth.

Then laminate the floor, a few inches up the walls, and the raised toilet ledge with a few, thin layers of epoxy/fiberglass.

The toilet ledge will be sprayed with automotive primer/filler and sanded/blocked smooth.

Now, the floor area and wall cove will be covered with flooring epoxy and broadcast with black and white quartz grain. That means, throwing the coarse sand mix on the wet epoxy and vacuuming the excess of after cure. That is followed by another layer of epoxy, another broadcast, and an epoxy topcoat.

After finishing the toilet ledge with a battleship grey marine topcoat, white FRP bathroom panels will be glued to the remaining bare plywood walls and caulked in the corners. Luan (or Lauan) sheets between the FRP panels and the plywood will make up the thickness of the epoxy wall cove.

Ceiling will be clear coated pine T&G boards with white LEDs embedded from the backside to form a random, celestial pattern.

Basically, I am building in situ the one-piece FRP bathroom from an old camper that I could not find. Just not as dingy.
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Old 09-15-2019, 08:53 AM   #15
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Go with a large shower pan and mount the toilet in the edge of the shower pan - youíll never need them both at the same time, and it saves a ton of space. Just remember to secure the loo properly not depending on the fiberglass pan to hold it solid. Reinforce the pan floor. Cheers.
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Old 09-15-2019, 09:03 AM   #16
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Go with a large shower pan and mount the toilet in the edge of the shower pan - youíll never need them both at the same time, and it saves a ton of space. Just remember to secure the loo properly not depending on the fiberglass pan to hold it solid. Reinforce the pan floor. Cheers.
My concerns is how the ABS pan will will look after walking in it with inevitably dirty shoes.

After doing more research, I'll go with a broadcast epoxy mortar floor that slopes towards a linear drain at the door sill.

Space requirement will be the same as your excellent suggestion, but someone has to take the road less traveled.
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Old 09-15-2019, 10:26 AM   #17
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TO the person wanting their folding door to fold inwards...Draw an arc for the door travel. Make sure you can get the door open afterwards!
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Old 09-15-2019, 10:48 AM   #18
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What shower pan did you think was too flimsy?

I read through all the replies to this thread. Here are my thoughts:

A mortar bed will have a shortened life because it is in a moving object with vibration and jarring. As any concrete guy will tell you; if you pour it, it will crack.

Why the ledge for the toilet? I saw this style pan on the RV equipment sites. I don’t understand why you would need that step. I also don’t understand the sloped floor. The problem with a motorhome or a skoolie is that unless you have leveling jacks or blocks you’re a slave to the slope you parked on. Maybe you get level all the time. More likely, you’ll have a big sponge and a little bucket to dry the pan.

Is the intent of having a linear drain to not have a dam at the door? I don’t think I would do that. If you back up or if you make too big of demands of your drain, you could end up with a flood into your space.

I really like your idea of using grey water to flush. I like it a lot. I’m going to research filters. Grey tanks get junk in them, so it’s important that a serviceable coarse filter, like a strainer, gets installed in the line of your pump. And of course you will need two pumps with this setup.

There are shower bases for residential construction with right and left drains.

I’m planning a wet bath too. I was going to use one of those residential shower bases with a Dometic 300 series toilet.

I have the same concern about shower base strength, especially when I cut a waste drain into it. I figured that if it was too soft I would lay up some fiberglass on the underside to provide strength if necessary.
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Old 09-15-2019, 11:08 AM   #19
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Depending on what the pan is made of you may find that "fiberglass" won't adhere --It will seem to at first and then after a short while it will delaminate.
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Old 09-15-2019, 11:26 AM   #20
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Depending on what the pan is made of you may find that "fiberglass" won't adhere --It will seem to at first and then after a short while it will delaminate.
Jack
Agreed. Iím referring to the fiberglass pans. Of course there are a lot more thermoformed ABS pans and even HDPE pans out there now, so some research is warranted for sure.
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