Expert Answers in Deflection

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?

Donato Pompo Donato Pompo · Jul 18th, 2020

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…

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Ceramic and Porcelain Tile Deflection Expert Answers failures Grout

How do you repair grout that comes loose so it doesn't continue to happen?

Donato Pompo Donato Pompo · Jun 24th, 2019

ANSWER - Grout joints in a 12x24 inch tile should be at least 1/8" wide otherwise the grout can't fill the joint as it should.  If the grout joint is 1/16" or less then chances…

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Ceramic and Porcelain Tile Deflection Expert Answers installation Standards

What is the allowable deflection of a substrate suitable for a porcelain tile?

Donato Pompo Donato Pompo · Feb 25th, 2019

ANSWER - The standards for a porcelain tile is that the substrate can not have more deflection than L/360.  For natural stone over a wood subfloor it is L/720.  L stands for…

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