Looking at the new Kerdi Board Niche - Prefabricated shower niches from Schluter
Here is some more insight on the Kerdi Board Niche's
Kerdi Board Waterproofing Facts
I studied the Kerdi Board Data Sheet that Schluter Systems has online here to find out how I missed the information that the Orange layer on kerdi Board is not waterproof. I read it twice. Double Checked it and to my surprise it makes no mention of this fact.
A retired Defence Engineer is telling me, you and everyone else that the foam layer is the waterproof material.
Originally Posted by jadnashua
Why would a company make a water proof vapour proof product with cardboard between the tile and the waterproofing? Would that not make the board weak - if is the cardboard layer that gives the foam strength.
Man I'm confused. I wish I new more.
Lucky for me I have both Dale Kempster's and Bob Weins email address for Schluter Systems.
Yesterday I email Dale this;
Is the orange layer on kerdi Board not waterproof? Is the orange layer vapour proof.
I'm being told that it's the foam that is waterproof. Why would that be?
Am I to believe that Kerdi Board is designed with cardboard between the tillable face and the the waterproofing portion??? This makes no sense.
I have tested Kerdi Board and think it's crap. But I did find the orange layer to be waterproof.
Would love to shut up this A-hole online with the facts.
Today since I did not hear back from Dale I email Bob Weins - (no surprise it's a Saturday after all - I'm sure the man has better things to do than email me on a weekend).
I wrote this to Bob.
Sorry to email on a Sunday but I have a question to ask of you. In the NKBA training seminar your assistant showed cutting and folding out the Kerdi Board in the inside corners. I have been told recently that the orange material on Kerdi Board is in fact not waterproof and it is the foam that is. Does this not make the corner non- waterproof?
I have personally tested the orange layer and have found that it is waterproof when attached to the cardboard layer (Special reinforcing Material). Who is write here?
Is the only waterproof part of Kerdi Board the foam?
Thanks for your help.
Now dale is the head tech for Schluter - if anyone know's he does.
I asked Jon Donmoyer on Schluter's Facebook page the same question and he could not answer it for me. I believe Jon is one of the top dogs for the NTCA now.
Hopefully one of these men can help out. I would be shocked it the orange layer was not waterproof.
When I did this test the Kerdi Board did not leak. Pretty sure this proves the Kerdi Board surface layer is waterproof.
When I made these test boats out of the cardboard layer they both leaked.
This is the card board layer in Kerdi Board - Schluter calls is a special reinforcing layer.
Help! - The orange layer on Kerdi Board is not waterproof !! Water wicking everywhere
Why use cardboard to strengthen foam?
Originally Posted by nukeman
So you are agreeing with Jim here?
Must be a engineering thing.
I measure the loss of strength in Kerdi Board at 30% when wet.
Kerdi Board - Soak cardboard layer just peels away
When wet the cardboard just peels away from the foam!!! - you are saying this is OK men - the design I mean. You really think the orange layer is not waterproof? Who told you that - John Bridge? he is an old man - he will write just about anything online....
The Kerdi Board is all ready crappy to begin with - now we are finding out that the orange layer is not even waterproof. I think both you men are in for a surprise when the men at Schluter answer this question of mine.
The best kerdi Board is made from concrete and Kerdi.
My last job I used Denshield, then Grani Rapid then Kerdi - that is option B.
Kerdi Board by itself is crap - just saying.
The cardboard and the fleece layer separately leak when tested along. Together they hold water. Maybe it's the glue that is waterproof here?