Follow the DIY transformation of a 1946 home
Wait! So, did you re-grout right over the old grout or did you file all the old grout out first? Curious me.
It was right over the old-- there was enough that had worn away already.. HOWEVER-- I let the grout sit far too long and ended up having to fully scrape it off and re do it.. (I have yet to re do it again)