Confusion about tile grout
QUESTION:
I called customer service at Custom Building Products today and by luck ended up talking to someone with experience installing tile for people with MCS.
He told me not to use any standard grout but instead a mix of 2 parts sand and 1 part cement. I considered it, but since this is an apartment installation, I don't think that would be allowed due to installer warranty issues and higher risk of cracks developing.
The conversation worried me though as he said that the sand and cement method is all he could recommend based on his experiences with MCS.
I'm wondering if you've recently used the Custom Building Products Polyblend grout (around 2008-09). I've read of some people having problems with polymers, but the polyblend worked well for you for your 2005 bathroom remodel described in your e-book. I'm worried there might have been some formula changes so if this product has worked for you recently as well, I'd feel more assured.
I'm also considering Laticrete SpectraLock, which is the only Greenguard certified brand, and C-Cure since other MCS resource sites recommended it. I recall someone saying the C-Cure needed to be offgassed for a week though :/ .. at least a week isn't too long and I intend to do at least a 5-day bake out anyway.
Whether modified with polymers and biocides or not, all the pre-mades have been enhanced with 'special chemicals.' I'll just have to rely on experience here ;)
POSTED BY MK :: TEXAS USA :: 10/26/2009 3:37 PM
DEBRA'S ANSWER:
We've used Polyblend within the last year and had no problems with it. I don't know what the "special chemicals" might be. We'll use it again as we continue to remodel our kitchen.
The cement/sand blend would be the least toxic for sure. But I don't experience the Polyblend as being toxic.
Readers?
Debra :-)
I have used his preferred mix of white portland cement and white sand and I then mixed in mineral-based cement colorant to color the grout. It works and looks great. I used this in a second-story condo and had no issues with cracking. It is as inert as you will find for grout. For thinset mortar I use LATICRETE 317, with no additives. I have used C Cure in the past, but different "batches" will sometimes smell stronger then others. Buy a bag of whatever you want to use and mix a bit in a glass jar and then smell it. It should smell like "earth" (wet dirt/mud) if it smells strong, don't use it.
POSTED BY GREYSON :: TEXAS USA :: 11/12/2009 12:05 PM
