Using Jacuzzi platform as part of shower seat, waterproofing

[personalt]

I am trying to frame out a platform for a drop in jacuzzi that has a shower next to it. The shower glass comes up over the platform to make a seat area inside the shower.

my concern is water proofing the seat area. Where do I bring the shower membrane to? My plumber stated that he can make an inside corner with the membrane where the pan hits the bottom of the seat. But he said he couldnt make an outside corner at the seat ledge with the membrane.

where should we be taking the membrane to?

Should I be concerned that there is no slope to the seat? I was thinking of framing out a seat inside that space but that adds to the number of corners and seams

I am sure someone has done this before.. what is the secret? Does anyone have pictures?

[bbcamp]

Do a search on shower benches, you'll see couple of examples like yours.

The horizontal areas do need to slope to the front edge, so that'll require a little extra framing. Make the framework very stiff, and use a piece of plywood for the seat. Cover that with backerboard.

You treat the front edge of the seat like any other wall; just bring the pan liner up the front 6 or so inches. Set your backerboard over the front and cover the liner (just like the walls).

After you get all the backerboard up, cover it with a roll-on surface waterproofing membrane. Cover the seat, the front down to the pan, and the walls up at least 6 inches. Use the mesh tape for the joints.

You could do the whole thing in Kerdi, too.

[personalt]

They didnt see to have any slope in the picture. But I can add some slope.

Can you or anyone else recommend a roll on surface waterproofing material?

[bbcamp]

Redgard is sold at HD.

Lowes has another product whose name escapes me at the moment.

[dianelouise]

we did ours with kerdi - worked great. we kerdi'd the entire tub platform just to be sure. good luck! diane

[John Bridge]

Diane, put up a picture of your shower with the seat.

I did one a couple years ago. I make a plywood joint right about where the glass would go and sloped my seat inward from that point. It doesn't take much. It's just that you don't want water collecting back against the glass. I quarter to three-eighths in. from back to front is plenty.