Schluter Systems Shower System w/preformed Tray Part 2

[chicanofighter]

This installer is an idiot, he should've put the bottom corners first, and then the long strip corners second so everything can overlap properly

[h3rcvry]

@chicanofighter The Kerdi system is a fully BONDED system. It doesn't matter which layer goes first, as long as everything overlaps at least 2". We have NEVER had a problem with this system.

[h3rcvry]

@chicanofighter The Kerdi system is a fully BONDED system. It doesn't matter which layer goes first, as long as everything overlaps at least 2". We have NEVER had a problem with this system. We actually don't double up in the corners (vertically), we make sure each piece "continues" around the plane change.

[4drcivicb18a]

Wouldnt you install the corners after the walls and floor?

[carpetonepanamacity]

First, if you're willing to lose a waterproof warranty because you want to use thinset instead, I have to question why. Second, there is absolutely no reason to use a modified thinset at all because the regular thinset creates the exact same bond without the cost. The trick is in the chemistry of the mix. Modified thinset uses latex to extend the drying time to increase the bond strength. You don't need latex to extend cure time when you set on top of polyethylene. The poly does it for you.

[FireAce44]

Try using modified mortar like Versabond, instead of the Shluter required "unmodified". You may loose Shluters warranty, but you wont be needing it. Modified mortar is a thousand times stronger than unmodified. Dont worry about it drying, because it will dry.

[carpetonepanamacity]

Not exactly. Kerdi is paper thin, and the most layers that overlap in this video is three. We've installed many of these, and we've never had a problem like you spoke of. In fact, using a 1/4" trowel, I cannot see how three sheets of paper totalling less than 1/16" thick could make a difference.

[vpbubbies]

One thing I dnt like is how the corners end up "swelling", (for lack of a better word) due to have so many layers in that specific area, IE: 1-vertical corner band layer + 1 horizontal corner band + 1 corner patch layer {2 layers for the corner patch on the floor as seen in this vid}, + 1 layer from the main wall sheet, so on the vertical wall in the bottom corner it has a total of 4 layers thick and 5 layers thick on the inside corner on the floor! It can cause "Tile issues"

[pazure]

@vpbubbies I had the same issues. Not only are there that many layers of Kerdi, but also count the thinset below each layer. Wow....they add up. The only way to get around this is to trowel out a thicker than normal layer of thinset under the main sheet parts. And this would no doubt cause other issues.

[dngrdave2000]

Thanks... I'll be doing my own in a month so I'm trying to educate myself and learn the "tricks of the trade before I start.

[vpbubbies]

@dngrdave2000 advise, make sure your mix is a wet one! Also, this isnt very good for bonding over blue-board/aqua board, use the cement board instead, the membrane bonds better to that.

[dngrdave2000]

Wouldn't it be better to start with the bottom band and work your way up? That way everything overlaps so water can't get behind it? Am I missing something?

[carpetonepanamacity]

@dngrdave2000 With the Schluter system, you only need to overlap the Kerdi by four inches, and it can be either top to bottom or bottom to top. When they are adhered together and overlapped in either direction, water cannot get between the Kerdi sheets. This is atypical to the old method of using roofing felt, but the roofing felt was not adhered together either. Great question.

[jazcastiglione]

@carpetonepanamacity The recommended overlap is actually 2", not 4".