[garyp]

painted with mildicide add to paint and I have mildew showing up on wood siding

 

[Gymschu]

Very common. I find the mildewcides to be virtually worthless. Mildew is just gonna grow on siding that is damp most of the time. The spores feed off the paint. I have even used a high gloss paint on siding thinking the mildew could not stick to a shiny surface. Had more mildew on that surface than any other. Wish there was a magic solution, but dampness that clings to siding for large chunks of the day is just an incubator for mold growth no matter what you do to fight it.

 

[garyp]

Painting

hey,

I CAN'T IMAGINE WHY I HAVE THE MILDEW PROBLEM AND HOUSES RIGHT
AROUND ME DO NOT. I HAVE USED CLOROX AND JOMAX. THIS WORKS FOR ABOUT 90 DAYS AND THEN THE MILDEW BLOTHES AS BIG AS PAPER PLATES START TO SHOW UP AGAIN.

GARYP

 

[Windows]

In some circumstances bleach can be effective at reducing mildew - other times it can actually promote mildew growth. There is research posted on the internet you should check out. I believe Teatree oil is suggested as an effective alternative.

 

[Will22]

Mildewcides

Adding mildewcide to exterior paints does not make it mildew-proof. Mildew thrives in an environment with moisture, humidity, and shade. As mildew is an airborne fungus, it grows primarily on organic material. If there is surrounding vegetation , grass or leaves may blow onto siding, and mildew will grow on that material. In some climates or environments, it may be necessary to clean exterior surfaces with a bleach solution every six months or so.

Exterior paints have mildewcide in their formulations, which are regulated by the EPA. This prevents mildew formation on the paint film, but again, does not make the paint mildew-proof. Alkyd (oil-based) paints , in comparison, attract mildew because the alkyd resin provides is organic.

I hope that this is good information.