How long does it take for mold to grow in the basement?
Mold needs 1 ) Time 2 ) Moisture 3 ) Food 4 ) Darkness and no air circulating If the conditions are right mold will start growing with in 48 hrs. Get the sump pump working! Remove any one of the above factors and you will not have any mold problems. For a basement a dehumidifier if it is damp will keep your basement from getting mold. Or even a vent fan.