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Expert Answers in Movement Joints
How Should Movement Joints (expansion joints) be Installed in Tile Installations?
The TCNA EJ171 now allows for zipper or sawtooth generic movement joints in tile installations, where you follow the grout joints within the tile assembly, not into the mortar bed. It is not uncommon for…
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Ceramic and Porcelain Tile
Concrete Substrate Slab
Debonding Tile
Expert Answers
failures
Hollow Sounding Tiles
Moisture Problems
Movement Joints
Tenting
Can moisture in a Concrete Floor cause the Thin-set Adhesive to Deteriorate and result in Hollow and Tented Tiles?
ANSWER - Thin-set mortars should not deteriorate from being exposed to moisture. Most thin-set mortars are used in showers and in pools and fountains. Moisture that migrates into the concrete slab from the ground and…
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Ceramic and Porcelain Tile
cracks
Deflection
Expert Answers
failures
Grout
installation
Movement Joints
Repairs
Sealant Caulk
Waterproofing
Wet Areas
How do I repair the Horizontal Grout Joint between the Bathtub and the Tile wall?
ANSWER - The transition joint between the top of the bathtub flange and the wall tile is not supposed to be filled with a cementitious grout. It should be filled with a resilient ASTM C920…
Read MoreCan Movement Joint Widths be less than 1/4 inch as TCNA Handbook states?
ANSWER - TCNA Handbook does say that movement joints within the tile assembly should be at least ¼” wide, but the current version of the handbook does indicate that if your movement joints are installed…
Read MoreWhen do you need Movement/Expansion Joints?
ANSWER - Expansion joint is a type of movement joint. All tile installations require movement joints of some type. The tile industry installation standards require movement joints and all the manufacturers of tile and tile…
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Ceramic and Porcelain Tile
Expert Answers
failures
Grout
Leak
Movement Joints
Repairs
Sealant Caulk
Showers
Waterproofing
Wet Areas
Is it alright to use Silicone Sealant to fix a Shower Leak?
Answer: First of all, all of the transition joints in the shower both horizontal and vertical should not have been grouted with a cementitious grout. They should have been filled with an ASTM C920 resilient sealant…
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Ceramic and Porcelain Tile
Debonding Tile
Expert Answers
failures
Grout
installation
Movement Joints
Tenting
What can I do about my 2 year old tile installation that is coming loose?
ANSWER - It sounds as though your tile installation has failed and is debonding. It is likely due to compounding deficiencies in how it was installed. The substrate may have not been properly prepared. The…
Read MoreShould I use 100% Silicone Caulk Sealant or the Sanded Caulk Sealant?
ANSWER - The tile and stone industry standards require that an ASTM C920 sealant (caulk) is used for movement joints and transition joints between changing planes or materials. ASTM C920 are normally 100% silicone or…
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