DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Walls and Ceilings > Bathroom walls lots of moisture & Damaged drywall by tub

Thread Tools Search this Thread Display Modes
Old 10-02-2013, 03:44 PM  
Junior Member
Join Date: Oct 2013
Posts: 7
Default Bathroom walls lots of moisture & Damaged drywall by tub

Hello ,

My bathroom is roughly 9x5 and every time we shower the walls always tend to have a lot of moisture on the walls very quickly. I do have exhaust fan which is the biggest ive seen allowed for a 4in duct.

I also get water damage where the tub meets the wall on the actual Sheetrock. I do have those plastic water "stoppers" but that doesn't seem to help. I replaced that section ( small 12in x 8 in ) about 3 times already

Not sure what else can be done. Any help will be great


Sf49168 is offline  
Reply With Quote Quick reply to this message
Old 10-02-2013, 04:20 PM  
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 12,142
Liked 1178 Times on 1035 Posts
Likes Given: 1935


Welcome to the site. A 4" duct should be enough but you also need to look at the length of the duct and the number of bends in it. One ninety degree bend is like adding 5 ft to the run. I took ojne bathroom apart to find a three inch duct with five elbows in three feet and one joint had fallen apart and the end of the duct was stuck into fiberglass insulation for twenty years. When the fan is running put a kleenex over the screen, it should hold it there. If that works try it again with the bathroom door closed, sometimes there just isn't enough repacement air.
For water getting around the shower curtain, I've seen success with the new curved curtain rods and the trick is to move the rod into the shower area about 5 inches. With the curve you still have more room than with a straight rod.

nealtw is offline  
Reply With Quote Quick reply to this message
Old 10-03-2013, 12:03 AM  
CallMeVilla's Avatar
Join Date: Feb 2010
Location: San Diego
Posts: 1,370
Liked 445 Times on 344 Posts
Likes Given: 186


The best solution is to go to a 6" duct, along with limiting the turns and kinks as the very wise NealW said.

Ever thought about shorter showers? Tell the wife she has 5 minutes and you're coming in with a digital camera ...

Your wall is another issue. Sheetrock is NEVER waterproof, even green board. Best solution is to remove all the sheetrock and install Hardie board (cement board). Seal the corners with waterproof membrane or use fiber tape and Red Guard. Tile the walls. This is a great DIY project and will fix the moisture penetration.

Now, about shorter showers ...

CallMeVilla is online now  
nealtw Likes This 
Reply With Quote Quick reply to this message

Quick Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Painting over water-damaged drywall dave547 Painting Forum 5 06-05-2012 06:52 PM
Damaged drywall (from wallpaper removal) repair thereza General Home Improvement Discussion 3 05-01-2012 12:58 AM
Please Help - Another bathroom moisture problem NewbieDude General Home Improvement Discussion 3 04-23-2011 12:21 PM
Replacing drywall with tiled walls (bathroom) mattpdx Walls and Ceilings 3 11-23-2010 03:56 PM
Moisture in walls sm02 Walls and Ceilings 4 07-20-2009 02:07 PM

Newest Threads