Moldy OSB Board - Repair or Replace?

Hello there! I have some moldy OSB board that is under my bathroom, next to, and slightly under the tub and a closet. The flooring in the bathroom is tile. I pulled a section of the ceiling downstairs to get an angle on it, which is where the photos are from. The area that is moldy is 6 inches by 6 inches. There is a quarter sized hole in the center from me poking through (accidentally) with my shopvac when attempting to clean the mold from upstairs, before seeing the OSB board problem. The mold appears to have just been a poorly sealed corner of wood trim, so I will seal it up. For the OSB board, can I repair it somehow (mold killing spray and patching the hole, etc.), or do I need to replace? Hoping to not have to remove the tub or tile, and repair from the basement... I would love the communities input on this issue! submitted by /u/Ok-Elevator5527 [link] [comments]

May 15, 2025 - 01:46
 0
Moldy OSB Board - Repair or Replace?
Moldy OSB Board - Repair or Replace?

Hello there! I have some moldy OSB board that is under my bathroom, next to, and slightly under the tub and a closet. The flooring in the bathroom is tile. I pulled a section of the ceiling downstairs to get an angle on it, which is where the photos are from. The area that is moldy is 6 inches by 6 inches. There is a quarter sized hole in the center from me poking through (accidentally) with my shopvac when attempting to clean the mold from upstairs, before seeing the OSB board problem.

The mold appears to have just been a poorly sealed corner of wood trim, so I will seal it up.

For the OSB board, can I repair it somehow (mold killing spray and patching the hole, etc.), or do I need to replace? Hoping to not have to remove the tub or tile, and repair from the basement...

I would love the communities input on this issue!

submitted by /u/Ok-Elevator5527
[link] [comments]