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Flooring and Carpeting/slate tiles that popped up

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Kelly wrote at 2013-06-21 19:23:53
I am a pro with nearly 20years in the business.  

The fact that the original thinset is turning to powder suggests only one thing to me.  

Almost all tile setting and grouting materials are Portland cement based.  Portland cement is very strong and durable when used properly. Many tile setters aren't aware that adding additional water (after initial mixing)  to any Portland cement based product will severely compromise it's integrity.   The results are crumbly, powder like consistency after its cured.   That's probably why the grout was fine and the thinset failed.   As always, check and double check the substrate to make sure it meets the adhesives requirements, then proceed and follow mfr's instructions.     Good luck.  


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John Michaels

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All questions pertaining to all indoor floor coverings regarding best products to choose, proper installation techniques, and proper maintenance techniques.

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We are a nationwide floor covering inspection service. We inspect all types of indoor floor coverings in every city and town in all 50 States and in all the Provinces of Canada. We see where errors in choice of product, improper installation, and improper maintenance lead to complaints being registered and we are then called upon to inspect those products and issue certified reports indicating from where those complaint issues eminate. We have done this type of work for over 40 years.

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Floor Covering Weekly & Floor Covering News

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Carpet, vinyl, and hardwood manufacturing, installation, and maintenance, prior to just inspecting, and a division of our Company specifies proper floor covering choices for residential and commercial uses.

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