Shower Pan Support Question???

[jbsails]

I have noticed that there seems to be no support for the fiberglass shower pan on my 1977 Argosy MH? The PO knows nothing about this as he never used the shower/bath, but I am wondering if I am missing some type of important support piece?? Any insight appreciated.

[bkahler]

Can you give us a little more detail? What floor plan is your motorhome? Are you referring to bottom support, side support, or ?

Brad

[jbsails]

Thanks Brad...the Argosy is a 24 with the rear bath and the shower/tub is on the curb side. There does not seem to be any support under the shower/bath floor at all under the coach. I am wondering what you all have or see under your models?
Best,
JB

[bullydogsmom]

Do yo have the shower pan out or does it flex when yu step into it? Ours flexed real bad, turns out that the floor was totally rotted under it. Ours isn't a MH but could be same problem.

Annette

[mello mike]

My model has a plywood platform about 3-4 inches high.

[bkahler]

Our 20' Argosy motorhome with side bath has a little bit of flex where the drain goes into the tank. Other than that it feels pretty solid.

I would bet there might be problems with the plywood subfloor being rotted out under your bathroom.

Brad

[John H.]

My 89 345 is Very Soft under the bathtub floor and flexes the most at the area of the drain. I suspect rotten plywood sub flooring from seepage around the drain, so far ! To scared to look further as I do not need a new ??? Project at this time !!!

[Minno]

If the plywood subfloor is good and solid, but the shower floor flexes when you stand in it, then maybe this fix I used in a SOB trailer years ago will help. I filled the cavity underneath the shower pan with great stuff foam. Once it hardened, the shower pan was very solid.

Chris

[John H.]

Originally Posted by Minno

If the plywood subfloor is good and solid, but the shower floor flexes when you stand in it, then maybe this fix I used in a SOB trailer years ago will help. I filled the cavity underneath the shower pan with great stuff foam. Once it hardened, the shower pan was very solid.

Chris

I hope that is all I need Minno !

How did you spray it under there ? from underneath ?

Or from the top ?

The Hallway floor is solid as well as all other flooring as far as I can tell !

[Minno]

Originally Posted by John Haggard

How did you spray it under there ? from underneath ?

I used the access hatch that was located in the side by the plumbing. It was an access hatch for the drain trap, so it was low and under the shower pan. I attached a piece of vinyl tubing (1/4” I think) over the tube that comes with the can, and used duct tape to seal them together. I also used some duct tape to attach the long tube to a stick so I could get it way back under the shower pan. Then I foamed it, starting at the back and working my way out to the access hatch.

Put paper down on the floor in front of the shower access panel, and mask off around the panel. And wear gloves. The duct tape didn’t make a 100% leak proof seal, but it worked well enough for what I was doing. Black electrical tape might work a tad better for taping the tubes together.

Good luck!

Chris

[John H.]

Originally Posted by Minno

I used the access hatch that was located in the side by the plumbing. It was an access hatch for the drain trap, so it was low and under the shower pan. I attached a piece of vinyl tubing (1/4” I think) over the tube that comes with the can, and used duct tape to seal them together. I also used some duct tape to attach the long tube to a stick so I could get it way back under the shower pan. Then I foamed it, starting at the back and working my way out to the access hatch.

Put paper down on the floor in front of the shower access panel, and mask off around the panel. And wear gloves. The duct tape didn’t make a 100% leak proof seal, but it worked well enough for what I was doing. Black electrical tape might work a tad better for taping the tubes together.

Good luck!

Chris

Thank You Minno! sounds like you thought this through !!

[3 Dog Nite]

This sounds like a great fix for my problem too. Thanks a lot Minno. Did you use the regular Great Stuff in the red can or the Great Stuff for minimal expansion in the blue can? I'll tackle this when I change out the gold drain basket. I like killing two stoned birds with one throw like this.

Ricky

[Minno]

This was pre- minimal expanding foam days, so it was the regular expandable Great Stuff foam. I think that gets harder, anyway, than the minimal expanding stuff you can get now too.
Two stoned birds are much easier to hit with one throw, aren't they?

Cheers,
Chris

[ScrapIrony-2]

I know in our '89, the subfloor is that particle board that crumbles after a bit of extended moisture...we've been lucky, so far but if we lose our luck, plywood is in the future, as is the epoxy sealant...mike