Removal Of Bathroom Black Mold in Drywall
Black Mold on Drywall!
Our bathroom was getting mold on our ceiling and walls within 3 weeks of cleaning off the walls with straight bleach during fall and spring months. During these months, the inside humidity could be fairly high, yet a quick dip in outdoor temps could create cold spots on walls and ceilings. And to compound this even more, the hose on our bathroom fan disconnected at some point, venting damp air into the insulation. So I tore off all the ceiling drywall and exterior drywall, removed insulation, cleaned things up, and brought both my ceiling and exterior wall in 2″ to allow more insulation and increase the R-value. I also did a bang-up job on insulating my attic with brand new insulation using insulation chutes near the eaves. I replaced our tub and shower too as it had some cracks. I must admit this was a big job but I am glad I did it – mold is not something I want in my house! See removing black mold in drywall for details on this project.
With all that moisture, you are lucky you didn’t get mold infestation behind the drywall itself. That would have made a bad problem even worse.
There was mold above the ceiling, but I cleaned that region pretty thoroughly. The mold in the attic was partially due to the vent pipe disconnecting at some point. It is SO difficult to work in tight attics like this, but once the ceiling drywall was off, I could get at things.
We have not had really cold weather yet, but so far there is no mold. I think the key is insulating behind the drywall good enough so the drywall stays warm rather than cold once winter cold temps set in.
November 30 Update: We have had some freezing temps, but because the bathroom is so well insulated now, it is the warmest room in the house when the heat kicks on. This makes the walls and ceilings nice and warm so they dry up almost immediately after a shower.
I think the days of bathroom mold are gone forever!
Its interesting to know that you do post quality posts. I liked it and have digg’d it as well. Thank you
It looks impressive! I like it lots. Simply doing something thus tiny could create something manifestation so much improved.
Regards,
Dave
I like what you have done here. Mostly i like the part where you say you are doing this to give back and looking at all the comments it seems that this is working for you as well.
If you’re new to dry walling, then there are some basic tools and methods that you need to familiarize yourself with. Here are the method know to make your next dry walling project.
Bathroom Remodeling Contractor
Hi, I have been using your drywall suggestions for several rooms. Bed room is the latest and a huge project but a little at a time it will work our great.
I love your article on your bathroom. I have a 60s colonial in S/E MI. Heat ducts and cold air returns are in the outside walls. I discovered Tiger foam closed cell portable foam kits. Not cheap but R6 or 7 per inch. Have used another brand as well. Insulated behind (brickside) of the head ducts, sealed tight all the gaps in the square ducts every connection had 4 at least 1/8 inch holes. Insulated the backside of the cold air returns, foam is fire retardant. Insulated the wall cavaties (about 2 or 3 inches) and then Isocyanurate foam boards an inch thick. Pulled 2 feet from the outside edges of the ceiling so I could seal the band joist btween floors. Walls are room temp, feel the original walls and cold. The boards also stop the heat transfer (cold) through the lumber. Did upstairs bedroom walls and ceiling between joists and the bathroom. No mold dries quick and nice and toasty. Guess I am not the only insulation/home improvement nut. Great site…Scott
I’d also like to share some of my own info, that I’ve come across by doing some extensive web research.
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