I have a 1.5 year old condo and I recently pulled the old caulk job the builder put in, and found they grouted between the tub and tiles and just caulked over it. The grout is discoloured in places (blue, orange, dark) so I figure it's mold I have to kill first.
But should I remove the some of grout here first? Or can I leave the grout (after removing mold) and just caulk over it again?
There's a razor thin line between the group and the tub already, and the build's caulk job never adhered to the tub at parts, allowing moisture in.
I have some pics of lines here (little pieces of old caulking remain): https://imgur.com/a/WoRx4