Hi Stu Lilley,
Thanks that was the thought process originally and the contractors cut out the grout and mixed it and applied it precisely as directed. The manufactures even gave them direct instructions to ensure it was done correctly. However a few days later it re-appeared. So that's why I'm trying figure out what else could be the cause.
Thanks that was the thought process originally and the contractors cut out the grout and mixed it and applied it precisely as directed. The manufactures even gave them direct instructions to ensure it was done correctly. However a few days later it re-appeared. So that's why I'm trying figure out what else could be the cause.