Best backer for kerdi membrane - Concrete board not drywall
Pete as a pro working here in Vancouver I'm going to leave you on this one.
Originally Posted by pete c
I want nothing to do with a drywall shower.
I'm so shocked that so many buy into these kerdi drywall builds.
FYI you can not return a used roll of Kerdi.
I would never buy thinset from a Hardware Store.
It's the wrong thinset to use with Kerdi.
And on and on.
Good Luck Pete - I hope you don't need it.
I would strongly advice you to make a test box 1'x1'x6" - Kerdi it and then flood test it. Place some plastic over top and leave it for a week. If your drywall holds up your in good shape.
While you are waiting for this test I would suggest you rip out the drywall and use cement board. Or return the Kerdi and but Ardex 8+9
Should you flood test showers built with Kerdi? Yes
Question for Musky Mike - How many of the 100's of Kerdi Showers have you flood tested? Your another one of John Bridge's "Moderators" or tile forum bosses. I think John Bridge has owned up to flood tested one kerdi shower in his day - how about you?
Originally Posted by muskymike
What does John Bridge give you for promoting drywall as a backer board? Are you required to recommend drywall to work for John Bridge? Is it a mandate or something as one of his moderators? Are you to old to carry cement board or something?
And Musky Mike you have 15,320 posts of John Bridge's site "How many times have you pushed drywall as a backer?"
It also says your a NTCA member on your profile on John Bridge's forum - I bet you didn't get trained on using drywall in your showers from the NTCA.
What's with all you John Bridge guys pushing drywall on people?
Really if you want to use drywall in a shower, why would you use Kerdi over Ardex 8+9?
Kerdi over Concrete Board is a proper system.
Kerdi over Hardi backer is a proper system.
Kerdi over Durabase is a proper system.
Kerdi over drywall is crap.
So Musky Mike tells us. Do you flood test your showers in Wisconsin or do you like to skip this step? Some setters do not understand that when they build a Kerdi shower it is the tile setter that needs to flood test it. I believe Wisconsin follows the IRC code does it not.
Are you required to flood test Kerdi Showers in Springbrook, Wisconsin? Answer is Yes
Musky Mike you did not let me down. Like so many of the John Bridge members you choose to skip a code required step in your bathroom renovations. Shame on you for advising so many on shower construction and then skipping the local code in your own town.
Originally Posted by muskymike
Every shower needs to be flood tested. In Wisconsin do you not follow the IRC (International Residential Building Code)?
Clearly this code requires this step. I'm amazed at the lack of respect the local code gets. It's not your job to flood test when you want - every shower is required to be tested in Wisconsin with a flood test just like it is in Maine, New York, Texas, Canada and on and on....
I'm sure you recommend drywall since this seams to be a collective effort on the part of John Bridge Tile Forum members - you moderators the worst of the lot. It's like you have stock in the company or something.
Are you to old to carry cement board or are you to cheap to use a better backer board?
Do you let your clients in Wisconsin know you will be skipping the code required flood test? I checked for Bill the local requirement in Maine (Bridgetown or something like that) would you like me to check with your local plumbing department for you? Your profile on John Bridge shows you cover;
Polk and Barron County
Are you telling me that these cities and counties do not require a flood test?
I'll continue to recommend concrete board under Kerdi. The TTMAC, NTCA, TCNA and drywall industry all think it's the best.
Your local code for review his here Mike - http://www.reedconstructiondata.com/...des/wisconsin/
Some more info here - http://dsps.wi.gov/sb/SB-CodeProjects.html#A81
Appears that Wisconsin is covered by the Universal Plumbing Code. And clear as day showers are required to be flood tested.
They should teach this stuff - 100's over Kerdi showers built and none checked? Why? Is a time thing or does the test cut into your profit margin?
Polk and Barron County - Plumbing requirements (flood tests)
Banned? I posted a thread titled "How do I delete my John Bridge Account?"
Originally Posted by muskymike
Nice try Mike.
Our site? You are a part owner are you Mike? I thought CX owned the John Bridge site?
I tried to share proper building advice on John Bridge's site. Seems to many of you old timers are stuck in your ways.
Now Mike your web site states you do everything, it lists "carpentry, plumbing, electrical, drywall, painting, and tiling" Do you have a plumbing ticket yourself? An electrical ticket? - Personally we leave this work for the ticketed sub trades. If you never got a plumbing ticket - this might explain why you are unaware of the flood test requirements.
You skirted my question on why you skip a code required step in Wisconsin. Is it a cost thing? Or do you just feel that the code book does not apply to you?
You really want to come over here and spread your garbage advice and think I would just let you? Every time a John Bridge member posts this junk advice I post the facts.
I'll make some calls for you Mike in Wisconsin and check into your local code for you.
If you like call Vancouver for me - we require them and I test all my projects.
Please do not tell people they are not needed. They are.
If your going to make an effort online try and post proper advice and not the crap about drywall. This is a marketing measure by Schluter and you need to deviate from the TCNA and TTMAC guidelines just to loosely follow rules.
If drywall was allowed it would state that it is right in the guidelines - but they don't. A simple text line stating that you need to follow manufactures guidelines is all that is in there. Schluter takes this and uses their backer board list as a guidelines and then this is streched into drywall being allowed.
Again if you are crazy enough to use drywall in a shower why not just use Ardex 8+9? Cheaper. Faster. Flood test sooner.