Jaz, it's too bad people can't be more considerate.

Not to worry, spam gets dealt with in no uncertain terms.

Hi Harry, Hi all,


I've never been one to worry about manufacturers' warranties. I figure if I do what I'm supposed to do, the shower isn't going to leak. In that light, I wouldn't worry about trying any waterproof adhesive with Kerdi-board. In fact, I'm in the process of testing one of the Sika-flex products.

As Harry has indicated, the joints in wet areas have to be sealed with either Kerdi or Kerdi-band, and that's not going to change any time soon. So the "sealant" aspect of the various glues, including Kerdi-fix, can't be depended upon anyway. Use the Kerdi-band.

Outside the wet area, anything that will adhere to the fleece and to the exposed foam will hold Kerdi-board together. Thin set will join Kerdi-board both inside and outside the shower. The other adhesives are more tenacious, though.

I would be careful of using any type of adhesive and advice you to test your selected product overnight before straying from the suggested path.

Many construction adhesives will expand and I have witness adverse reactions to styro foam type products and standard construction adhesives. This might not be the case with Kerdi Board but until you have loaded it up and let it sit overnight you are playing with fire...

Test all your products = all the time. Every job.

I still have a 1/3 tube of Kerdi Fix that has do some light work in my past two showers. The $26.00 is small change in the big picture.

Harry, are you not worried about the box around the vent pipe considering it is only held up with some adhesive? With the weight of the tile I would worry that it might fall down one day

I highly doubt that box will fall down. That Kerdi Fix adhesive is some pretty strong stuff.

If you ever get to see some of the finished demo Kerdi Board shower mock ups with free span benches you'll see what I'm talking about. You can virtually stand on those benches the next day and it's only their caulking holding those slabs up.

My Kerdi Board Tee Shirt arrived today. Have any of you received yours yet.

Great quality shirt.

"What will you build first?" I know I'm going to work with some of that wavy board and those new sexy stainless channel pieces. The brochure that came with the tee shirts had some fantastic profiles to work with. Many designed to work with the different sized Kerdi Board panels but these stainless elements will look sharp in any setting and in custom installs.

Look forward to the shirts men.

Thanks Bob.

Does Kerdi wick water? Does Kerdi Board?

Who knows....

Kerdi does not wick water even an 1/8" the fleece acts to repel water from what I can see with a couple of make shift tests. Kerdi placed directly in water repels to the point of beading the surface of the water.

Does Kerdi Board wick water? Why are people recommending removing a strip of the fleece for a joining two pieces of Kerdi Board with Kerdi Fix. Why does this step need to be done? Surely Kerdi Fix should make a tight waterproof seal between sheets.

I would suspect the reason for this is that the Kerdi on the Kerdi Board is a different beast. Why would that be?

If this new Kerdi Board does wick water through the fleece even a little - I will keep my sheets for testing and out of my clients homes. I am hoping that tests I've seen online where preformed on some defective product because I truly want this new board to be perfect. And from what I'm reading and seeing this is not the case.

With a board so flexible in design - speedier installs and faster turn around times will be possible. This part of the board and the no noise install the parts I'm looking forward to most.

Less than 2 weeks until my stock arrives.

PS My price here in Vancouver for Kerdi Fix is $22.50 CDN plus taxes...


There are so many ways of building a "Bullet Proof" shower. Which way is best? I know what's best for me and my jobs and most of you know what's best for yours.

I can tell you from first hand experience that MUD JOBS and building paper can keep a home nice and dry for say 60 - 80 years. I have removed a few like this and am amazed at how dry the studs where. I could imagine a skilled Mud Man would bang out a shower prep in a day.

I think these new products and boards all have a place in every ones truck. These types of products developed to make the skill set less needed as every trade tries to go faster - do more - make more.

Master setters are disappearing - there are few to replace them. But a new breed of Masters is taken root with space aged product and design possibilities not even available just 15 years back. Topical waterproofing and pre slope bases the biggest improvements this past 10 years into mainstream renovations.

My thoughts.

I guess you have also herd about the alleged Kerdi Board wicking problem. Seems there may possibly be some defective board out there. I'm sure Schluter will figure out if there's actually any problem material. Apparently it's only the board that is made in North America.

As far as the Kerdi Fix goes, Schluter is telling installers to not rely on Kerdi Fix alone for wet area installations. You MUST apply Kerdi Band to all seams, fasteners and exposed foam edges if they are in a shower area.

There seems to be quite a difference in the face material of the board as compared to the regular Kerdi membrane. I have not tried the water test on any of the board yet. I have been testing the bond strengths using Kerdi Fix and thinset on edge to edge and edge to face material.

Hope you like the new product. Let us know what you think.

Just a follow up on some water testing with Kerdi board.

I soaked some raw board pcs in a bucket of water just to see what might happen. After an overnight soak I removed the pcs and noticed that there was significant wicking around the perimeter edges, anywhere from 3/4" to 2" When I looked at these pcs the following day the surface areas that showed signs of wicking were wrinkled and delaminating from the foam core.

I'm going to make a Kerdi Board box with all the proper seam coverings and fill it with water to see what happens, then I'll decide whether it's a product I would use.

From what I have seen so far it's not a real confidence builder to see a supposed impervious and expensive waterproof product for wet areas show signs of failure.

Before I started using Wedi I did the same test. Wedi showed no signs of failure from the soak test.
I have even seen pcs of DensShield scraps that have sat outside in the rain for a few days that didn't delaminate.

Good to know, RC. Keep us updated.