I'm embarrassed to even ask this question, but I'm a new home owner and I don't want to mess up, Therefore I am kind of seeking the opinions of an expert to tell me if this is floor grout is sealed correctly. My biggest fear (and maybe someone can confirm or deny this even happens in a house so I can stop worrying about it) is that since grout is porous it will saturate into the subfloor and will rot it. We mop daily so maintaining this kind of important to me. Background: We purchased this house we're ignorant about sealing grout. We had no clue that the contractor didn't do this before we moved. Since we mop often, we noticed the grout was becoming wavy and we decided to seal it soon after. Because this is our first time sealing, we are not sure if we done this correctly. Therefore I was hoping someone here be kind of enough to take a look and confirm if it's sealed or leaking through and further ruining my grout. We laid it very thick in the grout lines and applied twice as directed. Since it should bead up if done correctly, which it does, but also leaves behind "wet" like appearance after drying with a towel has me concerned. Can someone please look at it? I did a video on youtube here - [url]https://www.youtube.com/watch?v=32oiNPHhguo[/url] Is this normal? Does it look like it's sealed and is this wetness left behind logical expectation after being wet or is it indication that it's no sealed correctly? Thanks

Good Morning Everyone! Quick question. Im about to lay some wood plank looking ceramic tile down in the bathroom , i think there about 36 inches long. Old house, main subfloor is only 1/2 inch thick. There is also a 1/4 inch layer of sureply on top so that gets me to 3/4 inch. where should i go from here? Is it true i should have 1 1/4 '' for sublfoor? Should i tear the sureply out and throw in 5/8'' then cement board on top . or can i just throw cement board over what i have. Its a small bathroom but i want to do this right. sorry i cant rotate image