DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (
-   Building & Construction (
-   -   Window in Bathroom Shower: MOLD (

roztom 08-27-2008 06:33 AM

Window in Bathroom Shower: MOLD
Greetings: I am one of those fortunate enough to live in a community that requires a window in bathrooms.

I have a vinyl replacement window right in the middle of a tiled wall in the bathrooms shower. Needless to say this gets wet all the time. (I do have an exhaust fan) I have caulked the heck out of it and painted it with enamel but there is mold forming as the area stays wet and even worse the water pools on the sill and does not drain off. (The sill tilts back towards the window).

Since the wndow must stay, what can I do to treat/paint, etc. this area? I need to remove the existing black mold forming on the windows inside sill but also need a paint that will seal and not be subject to mold.

Have any of you dealt with this kind of window installation/mold issue successfully?



DangerMouse 08-27-2008 07:05 AM

bleach will remove the mold from vinyl, and wiping the excess water after each shower will help, but you need to redo the sill so it tips IN, not out, pooling water will just add to the problem and may even seep under the window and rot wood.. a photo might help us here....


roztom 08-27-2008 07:15 AM

Removing Mold from painted wood
Will the bleach remove mold from the painted sill?

Is there any way to paint that sill with any special paint that will resist the mold?


DangerMouse 08-27-2008 07:32 AM

Will the bleach remove mold from the painted sill? yes, it should do fine, however if not kept dry, it will keep coming back. the tip of the sill concerns me the most as it will continue as long as this is not fixed, or at the very least towel-dried every time. there may be/probably is paint that is mold resistant, however, if not kept dry........ well, you know.


roztom 08-27-2008 08:06 AM

Marine Paint??
Is there any kind of expoxy or marine paint that might work here? I have it painted with an enamel.

Also since the sill tilts back towards the window so the water pools against the window frame and not so the water will drain, is there a way for me to put some kind of spackle/filler to build that up so the water will drain? I can't pull the window, sill and tile apart so is there another way to fill in the sill to raise it so I can get it to drain?



DangerMouse 08-27-2008 08:20 AM

tom, if it were me, i'd go to my scrap pile of vinyl siding and cut a piece to cover the sill, then build it up to the right angle with scrap wood or something then caulk with silicone caulk and paint. you need to keep the water running off the sill into the tub, not pooling. when we used silicone anti-mold caulk in our tub, it still molded over time, so i'm not too sure if mold resistant paint will help. maybe a photo would help. other options are needed here guys!


roztom 08-27-2008 08:47 AM

I will get a photo this afternoon.

Since this is in a shower and the window is at body level, would the siding or cladding be a cut hazard? Also is there a way to build the sill up with a solid material like a tile cement or some solid material that would adhere to the wood?


Brik 08-27-2008 09:31 AM

As for the sill - I would have a piece of solid surface countertop cut to fit, install it with thinset (same as tile). The thinset will be thick enough to allow you to pitch it slightly away. There are also faux marble thresholds that could work for this. If you have a tile sill remove that first. Then caulk well. As for pait - There are anti-mold additives for paint. i cant speak to their effectiveness. Mold needs two thiings to thrive. Moisture and something to feed on. The glossyer the paint the harder it will be for mold to grow and the easier to clean.

DangerMouse 08-27-2008 09:50 AM

perhaps you could use 4" square ceramic tiles if the marble is hard to find/work with? they have the curved edge pieces that could be along the outside to be the thinset to correct angle, grout tile, etc. just a thought.


roztom 08-27-2008 11:38 AM

SO, I might tile that sill, build it up underneath to pitch it, and then grout the #$%& out of it... is there any grout additive to stop mold.


Brik 08-27-2008 12:46 PM

Just use caulk (tile guys are cringing). There is mold resistant caulk. The advantage of one piece is no grout lines. Regardless you always caulk transitions (like floor to wall). So, even if you did tile with 4" tiles you would only have a few grout lines anyway depending on window size.

Hey - Found a link for ya

Good luck

roztom 08-27-2008 01:01 PM

3 Attachment(s)
I hope these are clear enough. The sill is only about 3-4in.

I can take more if that will help.


Brik 08-27-2008 01:07 PM

Yes - very clear - I would definitely replace the sill with a one piece plastic sill. You can get it in white (NO PAINT). While you are at it replace all the window trim with the same material. You will still have caulk to deal with but the PVC trim will hold up well.

roztom 08-27-2008 01:08 PM

Acrylic Sill Link
Brik: That is interesting stuff.

Is it a plastic or ..? SO basically I would put this on top of the existing wood sill, cover it and then caulk it in. Does it need to be cemented/pasted also? Does this also mean it deesn't need painting?



roztom 08-27-2008 01:13 PM

Removing existing trim
Will removing the existing trim be an issue? Will it wreck the wall/tiles ?

DO I have to remove the existing sill and all the trim? Does the window need to come out or can I get the trim and the sill out without taking the wall down?

Is this a genral handyman job or should I get somebody more "skilled?"

I am a weekend warrior and this is in a tenant's unit.. so it will have to be fast and done right the first time.


All times are GMT -5. The time now is 12:49 PM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Search Engine Friendly URLs by vBSEO 3.6.1