How to seal new Porcelin Tile
Porcelain tile is not porous so sealing is not recommended and can make it slippery like a sheet of ice...You can seal the grout in between though.
It should have been sealed otherwise stains will soak into it. Grout does have a shelf life. The stuff they used is old that's why it is gritty.The whole job needs to be redone to make it right. No matter what you do the grout is going to start breaking out. As far as the planking it needs to be taken up and the floor needs to be leveled before it is installed. Unfortunately there are people doing this kind of work that shouldn't be. Try filing a law suit against them. Edit There is a big difference between wall tile needing to be sealed and floor tile being sealed. Kitchen spills require a good sealer. As far s the woodwork a good installer won't break it.
