Having recently moved into a new (resale) house, I looked closely at the grout lines on one of the tiled shower floors and noticed many small gaps in the grout lines with an unidentified orange material in the gaps. I've attached a picture.
Obviously this grout is not in good condition and needs to be replaced; however, does anyone know what the orange material in the grout lines is? It appears to be coming from underneath and is raised into the gaps between the tiles, so occupies some of the cavity where the grout would normally go.
Thanks for any suggestions.
Best Answer
Looks like schluter ditra waterproofing membrane.
Amazon describes it:
Below is an image of tile being installed over ditra using thinset mortar. This is as far as your installation progressed. Your floor was not grouted after the tiles were set. I recommend scrubbing and rinsing thoroughly using a wet vac to remove water. Allow floor to dry well then grout with appropriate product.