We purchased a house a couple years ago. I have just noticed that water is leaking slowly thru the caulking in the bottom of the shower between the door rails and the shower base. Also the caulking between the shower base and the floor has a small gap in all the way around. After noticing this, I noticed that the baseboard by the shower is cracking and soft, and then I poked the drywall just about the baseboard with my finger and easily poked thru it.
Is it likely that the bathroom has lot's of mold and rot, or can I just dry everything out, replace the drywall and baseboard and caulking with new stuff?
Moisture can come from lots of sources improper ventilation,, thermal bridging, grout joints and caulking it certainly sounds like you have a moisture issue the only way to be 100% is with a moisture meter it will assess moisture behind the tile but this may be a cost that is not needed as it certainly sounds like you know you have a issue.
I agree with what Marlon says. You will not know the extent of the problem until you address the damage. You will have to replace the drywall and baseboard that is damaged, when you have that area opened up you will be able to access the extent of the damage. Some mold is easy to deal with, and if you have caught this early enough, you may not have a major renovation to deal with.
Good luck to you.
Sounds like you've assessed the situation pretty well from what you can see. You will only really find the extent of the damage by removing the affected areas and seeing what's going on behind the walls. Hopefully this is just the early signs of water penetration, and no mold has grown. My guess would be your shower is due for an upgrade and better ventilation is needed. But definitely have someone with experience come in and give his opinion before getting the sledge hammer out.
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