Answers

Hello Anthony,

 Cracks can occur for a multitude of reasons. I would recommend hiring a home inspector to take a look at your situation and get his professional unbiased opinion.

Thnak you!

 Teresa

Hello Linda,

 Typically,  you do not want to cover existing grout. You will need to remove the old grout and apply your new colored grout. A tile contractor can help you with this project. Please let me know if you have other questions.

Thanks, Teresa