By Lynne Adkins

PHILADELPHIA (CBS) — It’s another gray, gloomy day, and the only color is the bright green mold on the siding of your house.   The pavers are green and slippery, the gutters have that olive hue, and there’s something fuzzy growing on the roof shingles.

Just another damp day in Philadelphia.  But what can you do about mold growing on and around your home?

Kenneth Kemp, owner of Rittenhouse Hardware at 20th and Pine Streets in center city, says the Rustoleum Corporation has a line of products called “Jomax,”  mold killers for inside and out — you mix it with bleach and water, and then grab the scrub brush.

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(Some of the products for treating mold at Rittenhouse Hardware. Credit: Lynne Adkins)

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“Definitely have to scrub on the outdoor ones,” he advises.  “Or a ‘gentle wash,’ they say, which never works as well as some scrubbing.  The hose is usually good enough, but a power washer does help for stubborn stains.”

Engleside Products, of Lancaster, Pa.,  has an environmentally friendly line — without bleach — that won’t harm the bushes or grass, but does require more scrubbing.  And for the roof there are liquids you just spray on and forget: no buckets or brushes required.