Shower bench
Adding a bench to a partially finished shower. The bench is approximately 12 inched deep. Right now it is framed with green board over the framing. Other then providing a slight slope to drain into the shower pan, is there anything I need to do to water proof before tiling the bench. Yes, pull off the greenboard and replace it with 1/2 concrete backer underlayment. Greenboard is not approved for wet areas, and will cause you trouble later on. I hope your walls are cbu as well and not greenboard. Check out this thread, it has to do with this very issue. http://forum.doityourself.com/showthread.php?t=291702 A 12 deep bench is not deep enough for sitting. Youll want to be able to sit on the bench without leaning against the cold tile on the wall. If you are just using it for a foot rest, Im sure will be ok though. If you plan on sitting on it, make it deeper now while you can. 14 deep is better, and 16 is even better. The best construction for a bench seat is to build one out of concrete block and mortar. The bench seat gets built inside the pan liner so that any water that happens to make its way though goes to the liner and drains though the drain weepholes. There are some pros who are very successful at building wood framed bench seats, and it can certainly be done. Smokey gave you some good reading so check it out. Oh - as previously been pointed out above, NO GREENBOARD IN A SHOWER, NOT ON THE BENCH, NOT ON THE WALLS, NOT ANYWHERE IN THE SHOWER. Thanks for the help. Which CBU to use hardibacker or durarock? ALso, the bench was just an idea to fill the space from the end of the shower pan to the east wall since the upper portion of the north wall is the full length and glass block. Both the Durock and the Hardi will be fine here. Hardi sucks the moisture out of everything a little more than other cement boards so keep in mind that you must moisten it before applying the redgard ( or dilute the first coat of redgard with water ) as Smokey suggested. Or keep the green drywall, and cover the entire shower, and bench with Schluter Kerdi. Easy to apply, a bit like thick wall paper, and your shower will be water tight. You simply can not rely on tile and grout to be water tight. I agree about the dimensions of the bench, you need more than 12. Kerdi is an excellent idea for this application. One suggestion I have though is to create a stronger structure by installing plywood over the framing ... then your backerboard. Waterproofing is essential for this project. WOW!! Hi Harry. Its nice to see you over here helping out. I have been to your site and have learned a lot. Thanks and hope to see you around here more.
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