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Put a shower in last month. River rock are moving.  Took up some and adhesive is wet.  Never sealed it b/c we thought the grout that sealed was enough per the Home Depot guy.  This is a ready tile base. Do I have to take up everything or can I just redo the area that I found to be wet?  I'm afraid if I take up the dry parts I'll damage the base.  If I try to repair a section, it might leak at the point of old vs new.

Answer
Sorry I am tardy with my reply Mary...I am swamped at work lately.

Now your shower...things are looking rather dreadful aren't they? You said the adhesive is wet...what kind of adhesive did you use? You will need to pull up the suspect stones to determine how much of the rest is still ok. My first suspicion is the area around the fixed drain. If water is leaching down between the drain flange and the tile then it will continue to do so until you get it properly sealed against water penetration. I can't make out in the picture how tight the stones are fitted around the drain. If there is too much of a gap between the stone and the drain itself then it will be more difficult to get things sealed. The stone should be pretty much touching the form of the drain to within at least 1/8" or closer. This will make for a much more positive seal and protect this suspect area so water will actually make it to the drain and down. I would think that the stones should easily be removed in this present condition and remove as many as needed in order to get to what is still holding. I wouldn't be surprised if you didn't need to remove it all and start again. The area now affected will need to completely dryed out after you remove the bad area before you go again with the install. I would basically start over if need be in order to have a better finish at the drain, nice and tight to the shape of the drain then a bead of Silicone caulking at the point of transfer where tile touches either the plastic or metal...follow me? Ok Mary I hope this helps you with your problem, feel free to return anytime.

Perry V.

Flooring and Carpeting

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Perry Vellenga

Expertise

Ceramic Tile/Marble. I can answer questions about floor preparation, tile selection, layout questions, performance of products, expectations of finish, compatabilities, questions about grout and epoxies, evaluating an installer, asking the right questions to check competence...more? 33 years this August 2012/ many years in commercial application from exterior finishes to Mall store fronts/ interior finishes like floor packages in stores inside Malls examples: The Limited, Lerner/NY, Lane Bryants, Bombay Co., Now involved in Residential new construction covering all types of interior finishes and designs.

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I worked in an exclusive field of floorcovering called "Tenant Development" which is by invitational bid only, by way of a National bid list. These are large floor packages usually over 3500 sq. ft. of 18" x 18" Marble and Granite and many other types of Marble and sizes. They are specialty stores where the floor package can cost upwards of $50,000 for one store. I have also done "Structure" stores and J. Riggins stores, Lane Bryant,Express and Body Shop stores where wood flooring is used. Presently work for a National Flooring Company in the Residential new construction arena that covers most interior design elements..Granite Slab tops/wood flooring both job finished and prefinished ect..

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My response's are published all across the Internet and picked up by multiple Interior Design sites and Industry related web sites where people have questions...

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too many most of which don't count...

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