[Bender]

The house came with a bacteria that would normally be hard to get rid of. UV, bleach and peroxide took care of it. I just repeat the process to ensure there is no bacteria or mold. This seems to bother people in this thread which I find fascinating. A part of me wants to bring my black light to their dwelling.

[vl]

I have mold problem in one of the bathrooms. What would be your recommendation? Seal off bathroom and run UV, then vent? Or do I need to do entire house? I can also seal off bathroom and bedroom. Thanks!

[blub]

No, UV is unrelated to your issue.

First you need to figure out if it’s a surface infestation because of condensation or if it’s a constructive thermal bridge. The latter can be solved by raising the surface (wall, ceiling, etc) temperature through insulation or more inefficiently special heaters designed for this purpose.

In both cases, the contaminated material is removed down to the plaster or masonry. Wood, wallpaper and similar materials will likely be deeply contaminated and must be removed. For areas larger than 1 sq meter, it’s better to get a specialized contractor which will use HEPA vacuum cleaners, special bags, etc to ensure that the mould spores don’t spread in other rooms.

For small areas the agents of choice are bleach or hydrogen peroxide, both available in products for home use.

[blub]

Was it from flooding or how did it get there? How did you detect it?