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

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 10-02-2013, 02:44 PM  
Junior Member
Join Date: Oct 2013
Posts: 27
Liked 3 Times on 3 Posts

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
Old 10-02-2013, 03:20 PM  
Contractor retired
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,712
Liked 3053 Times on 2672 Posts
Likes Given: 5044


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 online now  
Reply With Quote
Old 10-02-2013, 11:03 PM  
Senior Member
CallMeVilla's Avatar
Join Date: Feb 2010
Location: San Diego
Posts: 1,641
Liked 590 Times on 449 Posts
Likes Given: 246


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 offline  
nealtw Likes This 
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
What to do with water damaged walls? captinii Painting Forum 5 02-25-2015 02:42 PM
Painting over water-damaged drywall dave547 Painting Forum 5 06-05-2012 05:52 PM
Damaged drywall (from wallpaper removal) repair thereza General Home Improvement Discussion 3 04-30-2012 11:58 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 01:07 PM

Newest Threads