Additional support in base of garden shower

Well, Plan A is done. We do not have a heat vent under the shower in our Rockwood Ultra lite 2604, so I could remove the access panel and see everything clearly.

The shower in our trailer sits on a 5/8" plywood shelf that is cut to fit the bottom of the shower allowing for the drain in the middle. On top of the plywood is a 1/2" thick pc of foam like the foam used in making formed packing trays. This is the problem because as you use the shower, this foam compresses and creates a gap between the bottom of the shower and the plywood shelf and this is where the flexing comes from.

My fix was to make a bridge that fits across the front of the shelf with a large surface of Velcro to keep the shower bottom snug against the remaining foam/plywood shelf. The Velcro keeps the shower bottom from flexing up.

I do have pictures but am not posting here. If you would like to see them, PM me with your e-mail address and I will send them to you.

The bottom line is that the flexing does not appear to be a structural problem, it is just annoying.

DadH

Well, we'll have an answer to this soon. Getting ready to head out to Rocky and see what's what. Fingers crossed that this is an easy fix. Details later today.

Thanks to everyone who posted to this problem. It's on my "honey-do-list" in our 242RESL for the spring. Been dreaming about using some of these turnbuckles http://www.homedepot.ca/product/9-3-8-inch-zinc-eye-eye-turnbuckle/818221?gclid=CP79nbGfzLwCFepFMgodJWEAQg&ef_id=UOw0ugAAE0BkC0Fw:20140214182742:sand some 2 X 2's to make an adjustable stand. We have a few more months of snow here so will keep dreaming for now.

The shower bench will create "hard spots" and concentrate the load in the area of the legs of the bench, much like a women's high heel. I think when you remove the panel you may find some support in the middle of the shower pan. I believe I would remove that small support and replace it with a piece of 3/4 inch plywood covering as much of the area of the shower floor/pan as you can. Then put shorter support legs under that plywood, maybe in 4 corners and the middle. Really should be a pretty easy and sound fix. You can probably hold it in place with a glue like "Goop".

The feeling dadmomh is probably referring to is a bit of "sponginess" in the floorpan just inside the door. At least that is how it is in my RV which is related to dadmomh's. The panel that is below the door is basically just large enough for the hot air vent located in the panel, so installing any substantial, solid feeling supports in that area will be a challenge. Expanding foam will not mitigate the sponginess, in my opinion; the support has to be stiffer for it to feel right under foot.

I'd be interested to see how others have addressed this issue.

If you have access, and there is some structural support present, you could try minimally expanding foam insulation under the tub. It swells to fill the voids, then dries hard. I've done this in a residential setting with good results (I entered through the crawl space and sprayed the insulation from underneath).

I added support in my last TT- just a few well placed boards. he will know what to do when he opens the panel. everyone is little different. ours they cut through a support for the drain, I was able to support each side and the shower pan felt a lot better.