I recently moved in with my grandma because it's closer to work. The house is nearly 50 years old and the basement isn't used very much. Mostly just to do laundry. Anyhow, I was working on a full clean - vacuuming everything, moving furniture, wiping walls, ceiling, etc. While doing this, quite a few spots stuck out that look like mold. In reality, the house will probably be sold in 2 years, so dumping a ton of money in for professional inspection/removal would only happen if it was severe. Here are the some of the spots. Can anyone give advice on the best way to approach this situation? Mold around the windows and on the drywall near the windows (7 windows total) Closeup of the drywall near some of the windows Looks like it got wet somehow and damaged the 'great' wallpaper. Is this actually mold or just something with the glue getting damp and staining? Ceiling tiles More yellowing on walls