Temperature: 62°F (17°C) – 87°F (31°C) Humidity: 40 – 70%. As plants approach harvest, some growers lower humidity down below 40% or even less to force cannabis buds to produce more resin, though I’ve seen that can majorly stress some plants, so that technique should be used with caution. Leaky Pipes. So we have the inference from the guidance documents that mold can begin to grow … If air at a given temperature is at 60% RH, it can hold 40% more water vapor before reaching 100% RH or the saturation point. Humidity indoors is a direct result when hot air comes in contact with a cool surface and water condenses to form dew. When dehumidifiers are set to remove enough moisture so the humidity level drops below 50-60%, the mold spores are unable to grow and spread. When you take a trip in your RV, is mold one of your traveling companions? If you can smell mold in your home or you have had wet building materials for more than 72 hours, then it may be time to call the professionals at Mold Solutions. I don't know why, so I asked them. Mold In RV's. Measure the humidity in the home using a hygrometer, which you can purchase at a local hardware store. These circumstances, if not fixed immediately, create the perfect environment for mold to grow. Mold and mildew can become costly and hazardous problems if left alone. One of the most common causes of mold growth, leaky pipes are frustrating because most of the time, homeowners don’t know about them until they’ve been leaking for awhile and mold has already begun. As already mentioned, humidity can be regulated by correct ventilation behaviour and kept at a pleasant level. There is a wide range of ideal indoor humidity reported by studies and online sources but most seems to agree that a comfortable humidity level is between 40% to 60%. The spores can damage wall boards, discolor tiles, destroy carpets and cause health symptoms that include respiratory and sinus infections. Do not ignore the early signs of mold in your home. That is why it is not enough to simply eliminate humidity if you have an active mold problem. Mold can happen from in the vegetative stage, flowering stage and even during the drying and curing of buds. Early Flowering Stage: 40-55% RH; Late Flowering Stage: 40-50% RH (can be as low as 30-35% depending on the strain) The RH should fall steadily throughout the growing cycle. Lowering Humidity Levels . These are the three important components that can allow mold to grow in your home. To stop mold at its source, you will need to eliminate the substance that allows it to grow in the first place: water. There are three common factors that mold needs to grow: moisture, nutrients, and time. What Does Mold Need to Grow? But there it is, on a concrete floor, wall, patio or walkway. We know today that mold can already start to grow at a room humidity of 80 %. Humidity is a common occurance in many homes in the PNW, and with humidity comes the potential for mold growth. When mold spores encounter a damp surface most advantageous for fungal growth, they can begin to grow and thrive. They can often be seen in the garage because it can be the darkest part of your house and molds grow in dark environments. As mold enters into a home, it can be brought in from a variety of sources such as open doorways, windows, vents, and even air conditioning units that can bring in mold … One way to reduce the growth of mold and mildew is to keep the relative humidity in your home low … below 40%. If you don’t know what the relative humidity is in your home during the summer months, an easy and inexpensive way to check is to purchase a hygrometer (about $10 at your local hardware store) and check your humidity levels. 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