Mold Remediation >> Black Mold Regulations

Moisture control is the key to mold control, the Moisture Control Section from Biological Pollutants in Your Home follows:Moisture Control Water in your home can come from many sources. Water can enter your home by leaking or by seeping through basement floors. Showers Black Mold Regulations or even cooking can add moisture to the air in your home. 

The amount of moisture that the air in your home can hold depends on the temperature of the air. As the temperature goes down, the air is able to hold less moisture. This is why, Black Mold Regulations in cold weather, moisture condenses on cold surfaces (for example, drops of water form on the inside of a window). This moisture can encourage biological pollutants to grow.

There are many ways to control moisture in your home: Fix leaks and seepage. If water is entering the house from the outside, Black Mold Regulations your options range from simple landscaping to extensive excavation and waterproofing. (The ground should slope away from the house.) Water in the basement can result from the lack of gutters or a water flow toward the house. 

Water leaks in pipes or around tubs Black Mold Regulations and sinks can provide a place for biological pollutants to grow. Put a plastic cover over dirt in crawlspaces to prevent moisture from coming in from the ground. Be sure crawlspaces are well-ventilated. Use exhaust fans in bathrooms and kitchens to remove moisture to the outside (not into the attic). 

Vent your clothes dryer to the outside. Turn off certain appliances (such as humidifiers or kerosene heaters) if you notice moisture on windows and other surfaces. Use dehumidifiers and air conditioners, Black Mold Regulations especially in hot, humid climates, to reduce moisture in the air, but be sure that the appliances themselves don't become sources of biological pollutants. 

Raise the temperature of cold surfaces where moisture condenses. Use insulation Black Mold Regulations or storm windows. (A storm window installed on the inside works better than one installed on the outside.) Open doors between rooms (especially doors to closets which may be colder than the rooms) to increase circulation. 

Circulation carries heat to the cold surfaces. Increase air circulation by using fans Black Mold Regulations and by moving furniture from wall corners to promote air and heat circulation. Be sure that your house has a source of fresh air and can expel excessive moisture from the home. Pay special attention to carpet on concrete floors. 

Carpet can absorb moisture and serve as a place for biological pollutants to grow. Use area rugs which can be taken up and washed often. In certain climates, Black Mold Regulations if carpet is to be installed over a concrete floor, it may be necessary to use a vapor barrier (plastic sheeting) over the concrete and cover that with sub-flooring (insulation covered with plywood) to prevent a moisture problem. 

Moisture problems and their solutions differ from one climate to another. The Northeast is cold and wet; the Southwest is hot and dry; Black Mold Regulations the South is hot and wet; and the Western Mountain states are cold and dry. All of these regions can have moisture problems. For example, evaporative coolers used in the Southwest can encourage the growth of biological pollutants. 

In other hot regions, Black Mold Regulations the use of air conditioners which cool the air too quickly may prevent the air conditioners from running long enough to remove excess moisture from the air. The types of construction and weatherization for the different climates can lead to different problems and solutions.Moisture On Windows 

Your humidistat is set too high if excessive moisture collects on windows Black Mold Regulations and other cold surfaces. Excess humidity for a prolonged time can damage walls especially when outdoor air temperatures are very low. Excess moisture condenses on window glass because the glass is cold. 

Other sources of excess moisture besides overuse of a humidifier may be long showers, Black Mold Regulations running water for other uses, boiling or steaming in cooking, plants, and drying clothes indoors. A tight, energy efficient house holds more moisture inside; you may need to run a kitchen or bath ventilating fan sometimes, or open a window briefly. 

Storm windows Black Mold Regulations and caulking around windows keep the interior glass warmer and reduce condensation of moisture there. Humidifiers are not recommended for use in buildings without proper vapor barriers because of potential damage from moisture buildup. Consult a building contractor to determine the adequacy of the vapor barrier in your house. 

Use a humidity indicator Black Mold Regulations to measure the relative humidity in your house. The American Society of Heating and Air Conditioning Engineers (ASHRAE) recommends these maximum indoor humidity levels.Outdoor Recommended Indoor Temperature Relative HumidityTemperature OutdoorsIndoor Relative Humidity+20oF.35%+10oF.30%0oF.25%-10oF.20%-20oF.15%

Source: Extension Specialist, Emeritus, Black Mold Regulations with reference from the Association for Home Appliance Manufacturers (www.aham.org). How to Identify the Cause of a Mold and Mildew Problem Mold and mildew are commonly found on the exterior wall surfaces of corner rooms in heating climate locations. 

An exposed corner room is likely to be significantly colder than adjoining rooms, Black Mold Regulations so that it has a higher relative humidity (RH) than other rooms at the same water vapor pressure. If mold and mildew growth are found in a corner room, then relative humidity next to the room surfaces is above 70%. However, is the RH above 70% at the surfaces because the room is too cold or because there is too much moisture present (high water vapor pressure)?

The amount of moisture in the room can be estimated by measuring both temperature and RH at the same location and at the same time. Suppose there are two cases. In the first case, Black Mold Regulations assume that the RH is 30% and the temperature is 70oF in the middle of the room. The low RH at that temperature indicates that the water vapor pressure (or absolute humidity) is low. 

The high surface RH is probably due to room surfaces that are "too cold." Temperature is the dominating factor, Black Mold Regulations and control strategies should involve increasing the temperature at cold room surfaces.In the second case, assume that the RH is 50% and the temperature is 70oF in the middle of the room. The higher RH at that temperature indicates that the water vapor pressure is high and there is a relatively large amount of moisture in the air. 

The high surface RH is probably due to air that is "too moist." Humidity is the dominating factor, Black Mold Regulations and control strategies should involve decreasing the moisture content of the indoor air.Should You Have the Air Ducts in Your Home Cleaned?- excerpt on duct cleaning and mold follows, please review the entire document for additional information on duct cleaning and mold.

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