A: DEAR VALERIE: Floor grout can fail for a host of reasons. Some of them have nothing to do with the original installation, and others have everything to. User Reviewed How to Grout a Tile Floor. Two Methods: Choosing and Mixing Grout Applying the Grout Community Q&A. After tile is installed, the next step is grouting. How to Repair Grout in a Floor. Grout lines are often the first part of a tile floor to need repair. Grout is a form of cement that sits between the tiles. How to Patch Grout in Tiles. Sometimes the grout between your wall or floor tiles can crack and corrode long before the tile does. If that happens, moisture can. I had a cermaic tile floor put in my 1st floor. The grout lines now look terrible. Home Construction & Improvement is not affiliated with Lowe's. How to Repair Broken Grout on Tile Floors. Email; Facebook; Twitter; Pinterest; Reddit;. Measure the width of the grout lines on your tile floor. . Patching bad tile grout only requires the right tools and a little bit of your time. Learn how to patch bad tile grout with. . Find out how to repair missing grout from floor tiles with help from an. How to Patch Bad Tile Grout . This Home Depot guide explains all that you need to know about grouting the space between your floor. Grouting Tile Floors Project. grout to your new tile floor. When doing floor grout repair. Your floor tile grout repair job will last longer if the new grout is not applied. Ask the Builder Secondary Navigation. About;.