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NFT: Home improvement guys,....a ? on bathroom caulking

I Love Clams Casino : 3/30/2015 11:45 am
So my wife tells me that the upstairs bathroom needs caulk around the tub. She was cleaning and some of the caulk pulled away. The caulk line is between the tub and tile wall....I started to pull away the caulk, and I see it's all mildew underneath, but the mildew is on top of a grout line, underneath the caulk. which makes sense to me....why stop grouting just because you're at the bottom of the wall/top of the tub?

I am thinking, if the grout line is in tact, just pull the caulk off, clean the mildew and I'm done, right? Why caulk over grout? I told this to my wife, but she's insisting that there should be caulk there, and now she has me questioning myself.....the space is somewhere between 1/8 and 1/4 of an inch...probably closer to 1/8th

More water collects there and grout isn't waterproof  
jcn56 : 3/30/2015 11:48 am : link
so you put a silicone caulk bead around the tub to keep the water out. You can get sanded caulk that looks like grout if you're concerned with the appearance.
Sounds like your wife just loves  
pjcas18 : 3/30/2015 11:49 am : link
caulk
grout is porous and not flexible  
oghwga : 3/30/2015 11:54 am : link
top of the tub does move up and down slightly.

Clean the hell out of it, let it dry and then put a mildew resistant caulk back in it's place.

Always caulk the lip around the tub and the inside corners.
Don't forget to wet your finger.....  
CBSGameFace : 3/30/2015 12:05 pm : link
(insert joke here).

When you run your finger against the bead to smooth it out, if your finger isn't wet, it'll turn to shit.

Today's FYI....
Where the tub meets the floor  
Randy in CT : 3/30/2015 12:11 pm : link
and the tub meets the wall, you should use silicone (not caulk). The tub moves a bit at times and the grout lines will crack. If you can, remove the grout and then silicone it. If you can't, silicone over the grout.

And remember, grout lines are not waterproof (though sealing them helps). Silicone is waterproof and mold-resistant/proof.
Make sure you use  
giantBCP : 3/30/2015 12:26 pm : link
silicone.
RE: Sounds like your wife just loves  
I Love Clams Casino : 3/30/2015 1:29 pm : link
In comment 12210260 pjcas18 said:
Quote:
caulk


We joke...we do...mostly because of those "This Old House" shows. The way they say it with that Bahston accent....good stuff
after clearing up the old stuff  
idiotsavant : 3/30/2015 1:31 pm : link
and prior to new caulk.

fill tub with water, as if for a bath.

this wil expand joints to bath fill level.

insert caulk into wider gap.

thank you guys  
I Love Clams Casino : 3/30/2015 1:31 pm : link
I will caulk w/Silicone caulk...I just assume that the highest priced is the best in this scenario? GE Silicone, about 9 bucks a tube.....
also- use water soluble caulk  
idiotsavant : 3/30/2015 1:32 pm : link
the full bath will be handy there as well.

trust me
RE: after clearing up the old stuff  
I Love Clams Casino : 3/30/2015 1:36 pm : link
In comment 12210456 idiotsavant said:
Quote:
and prior to new caulk.

fill tub with water, as if for a bath.

this wil expand joints to bath fill level.

insert caulk into wider gap.


makes sense....thanks
yep,  
idiotsavant : 3/30/2015 1:50 pm : link
genius

(not, stupid enough to have had to do honest labor once in a while)
You don't want water soluble caulk there  
jcn56 : 3/30/2015 3:20 pm : link
Most of the water soluble are acrylic caulk and are elastomeric. The application won't last very long in that environment, and when the caulk starts to pull away from the wall you'll get water intrusion. Best bet here is silicone.
RE: also- use water soluble caulk  
I Love Clams Casino : 3/30/2015 4:10 pm : link
In comment 12210458 idiotsavant said:
Quote:
the full bath will be handy there as well.

trust me


I actually don't mind the mess if that's what you're getting at...I mask off the caulk lines, and am quite finicky about it....I put a tiny dab of soap on my finger tip, and press that (gently) into the fresh caulk...I get nice clean lines and hardly any mess
Your wife is correct. You need to caulk it.  
rasbutant : 3/30/2015 7:11 pm : link
I like to blue tape it so it looks neat when done.
Also  
rasbutant : 3/30/2015 7:16 pm : link
I recently discovered a great tool to use instead of your finger. I used the outer covering from some scrape electrical wiring, you know the white or yellow. Works great and no more splinters.
cut a piece of flexible plastic  
PEEJ : 3/30/2015 7:18 pm : link
with a right angle. Nip off a corner and just pass it over the caulk bead to scrape off the excess and leave a smooth even job.
Spend  
blue42 : 3/30/2015 8:57 pm : link
the few extra bucks on a the best silicone caulk. It won't mildew and it cleans much easier.Remove all the old stuff,spray with Tilex in the joint, dry with a paper towel then a hair dryer.Then apply the new silicone caulk.
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