![]() ![]() I was hoping to see your profile filled out, but there was nothing there. Tomorrow I would like to reinstall the kerdi, but I'm not sure with what and I a little worried about bond over the residual Laticrete "cheap stuff". I have scraped down the hardie backer, the thin set was very sandy in texture. Custom only makes one grade of unmodified, again it has worked for me in the past. Laticrete admitted to making a product that is cheap and apparently unfit for its intended purpose to be marketed against the good stuff, does Custom also have a premium line that I'm unaware of? I called Custom tech support, got much more advice about the situation than laticrete offered, but it ended with a discussion about Custom disagreeing with Schluter about using modified or unmodified under the kerdi. I have used Custom before with good results. ![]() I asked about Custom Blend and he said he preferred the others without offering any reason. They suggested a laticrete product or mapei. I called Schluter back, they recommended that I pull off all of the kerdi, hose it off and reuse it over a different thin set. I was seeing red at this point, don't recall the product number of the "good stuff" as I had already sworn to never purchase any Laticrete products in my lifetime. He was quick to explain that their only obligation is the purchase price of the mortar and that I should look for their better grade of unmodified. He offered absolutely no technical advice, potential solutions, concern for the problem with the Laticrete product in the field. "why did you buy the cheap stuff? What did you expect?" Apparently Laticrete offers two grades of unmodified thin set, this was the only one that I saw in Lowes. The guy was in denial of any possible thin set problem from the beginning. ![]() Laticrete's tech support was less helpful. and they concluded that it sounds like thin set failure. I called Schluter, they said that they've never heard of a failure like this. The mortar is soft to touch, particularly where it got wet. The kerdi started to bubble up and within a minute was nearly floating off of the floor. I waited 20 hours or so, occupied house with heat, and water tested the pan. They were out of stock of Custom Blend unmodified, I went to Lowes and bought what appeared to be the Laticrete equivalent (Laticrete Floor Adhesive, unmodified, meets ANSI 118.1). I'm prepared to get beat up for this, but I typically buy Custom thin set from Home Depot. I installed a schluter shower kit yesterday, polystyrene pan with hardie backer walls and kerdi membrane. ![]()
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