Kerdi-Board Niches have no slope- Says who? Says Schulter Face Book
Jim I'm not sure how or why you believe that there is a slope in these Kerdi Board Niches.
I posted on Schluter's Facebook Page what you said about there being a slope and was told that there is none. You sir where mis-informed.
Here is my question to Schluter yesterday.
"Jim over on Terry Love's plumbing forum tells me that you have changed your Kerdi Board niches to included a slope in the bottom. Are you recalling all the old ones? How does a company in Vancouver ship back the old version for the new one? What if you installed an old one - are your accepting them?"
Here is the response I got
"No such change has been made, John. The tile can be sloped slightly if desired."
If you would like to double check this Jim you can find Schluter North America's post here.
Site Review of a twin Kerdi Board Shower Niche Installation
So we are installing two Kerdi Board Niche's on our current job here in Vancouver. The job site is an amazing condo down in Yale Town overlooking a park and the water. I love everything about the condo, the two bathroom designs except the choice in shower niche's. My client purchased two Kerdi Board Shower Niche's and wanted them installed regardless of my poor review of the product.
So - what do you do? I know - make the client happy. So we installed them both and are going to create the pre-slope that every shower pan, shower bench, shower curb and shower niche should and must have. To do this we used a self curing rapid setting thin-set from Ardex called X-32. It's the grey product in these coming photo's.
How to fix a Kerdi Board Niche - Adding the missing pre-slope to the niche's bottom
Using the grid lines on the Kerdi Board Niche I followed the back line and used the Ardex X32 to create the pre-slope. Here is a close up picture.
Is it the foam waterproof in a kerdi board niche?
That is so funny Jim. I know. Why would you make a product called Kerdi Board and not use a water proof material like Kerdi on it. This is why I hate these niches and the Kerdi Board in general. Worse than that if the surface is not waterproofed the cardboard layer under the orange stuff wicks water and then the board or niche looses it's strength. The stregth comes from the cardboard layer under the orange stuff and before the foam.
Originally Posted by jadnashua
Jim I used Kerdi Fix on the back side of the niche. The kerdi fix is bitting to the metal studs and those non-approved screws are there just to keep it put until the Kerdi Fix sets up. After the stucco mesh and Ardex X32 coat the niche is solid. Much more solid than I thought it might be - but still a little to flexible for my liking.
Not going to mess with Kerdi Band and thin-set on this one Jim - Going to tape it with SK Mesh and Ardex 8+9. So much easier and approved for use with Kerdi's materials. You should try Ardex 8+9 on your next Kerdi Install Jim - it's the North America equivalent of Kerdi Coll. It's how they do things in Europe and it makes working with Kerdi much easier and way safer in my opinion.
Back tomorrow to meet the plumber. He is going to love the metric plumbing layout I have for him!!! lol
Kerdi Board Washers have spikes in them.
Originally Posted by jadnashua
Jim have you not seen the washers? They are huge with four spikes on each one. Does that not make five penetrations into the foam waterproofing core? I would bet that the way I installed it is as strong if not stronger than the screws and washers. Anyway the point is mute since this Kerdi Board stuff is junk and I'm going to waterproof it with Ardex 8+9 instead.
I just realized now that the mini shelf that divides the niche into two sections also needs to be sloped. Guess I can just carve out the back a little to give it some pitch. I'll take a bunch of pictures for people to review if they find themselves in this same pickle.
Spray Foam as a brace on the back side of a Kerdi Board Niche
These metal studs did the trick to brace the second Kerdi Board Niche in position while the spray foam on the back side set up. The spray foam was used to hold the niche in position while the foam set up.