Home Improvement--General/ceramic tile - tub

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Question
I was hoping to "save" most of the existing tile so I removed only the bottom row of tile to replace a bathtub. The tile was attached to green-drywall...most of the paper came off so I cut it out to the bottom of the tile row above...my original plan was to put in a 5 " wide piece of backerboard and then replace the bottom row of tile ...I am concerned about the seam between the old drywall and new backerboard, it will be right behind a grout line... I've thought about putting silicone between the two but I am not sure that will work... any suggestions or do I jut need to rip it all the tile out + start over

Answer
Hello, Rob.

I'm concerned about the existing tile being attached directly to the greenboard, and the raw edge of greenboard that's been exposed by removing the bottom row of tile. Relying on silicone to seal off the raw edge will not achieve long-term results. Greenboard is not good as a water barrier. Cementious backer-board is designed to be an effective long-term water barrier, especially when it's installed correctly.

If you want this repair to be long-lasting, if you do not want to face another repair project in a couple of years (or less), I highly recommend that you remove all of the tile, and install cementious backer-board, following manufacturer's instructions.

Wishng you good luck -- and long-term results.

Diane Plesset, CMKBD, NCIDQ, C.A.P.S.
D. P. Design  

Home Improvement--General

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Diane Plesset

Expertise

I will answer questions about anything to do with bathroom remodeling: design considerations, safety, function, materials (cabinets, countertops, plumbing fixtures and fittings, lighting/switching, heating and ventilation, tile, stone, concrete, tub and shower enclosures, flooring, etc.), saving water, trends, ROI, and appearance.

Experience

25+ years as a bath-kitchen design specialist, hundreds of completed bathroom projects (all styles, all investment ranges). Author of "THE Survival Guide: Home Remodeling," co-host of a home improvement program on a local radio station for over three years. Currently hosting "Today's Home" on Lifestyle WebRadio every Sunday afternoon (http://www.todays-home.com).

Organizations
NKBA (National Kitchen and Bath Association), NAHB (National Association of Home Builders), PRO (Portland Remodelers' Organization), IDPC (Interior Design Protection Council).

Publications
"THE Survival Guide: Home Remodeling" (my book, published in 2003), Designers' Illustrated Magazine, Gentry Magazine, Kitchen-Bath Business Magazine, Kitchen-Bath Design News Magazine,Interior Coordinator Magazine (Japan); San Jose Mercury News, San Mateo Times, San Francisco Chronicle, Statesman Journal, Portland Tribune, Oregonian.

Education/Credentials
Multiple degrees: Bathroom Design, Residential Interior Design, Kitchen Design, and Lighting Design. Regularly attend classes and seminars to maintain current knowledge about codes, trends, sustainability, new products, etc.

Awards and Honors
Awards: Henry Adams Designer of the Year, CoTY, Master Design, Best of the Best, Chrysalis, Excellence (best home in its category), and NABE (best how-to book, 2003). "THE Survival Guide: Home Remodeling" received #1 listing in the City of Chicago publication, "Hiring The Pros".

Past/Present Clients
To see photos of completed projects, visit my website: http://www.dp-design.com/portfolio

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