Basement Ventilation System Design - There are numerous approaches to help prevent moisture damage issues at a cellar. The first guideline is no dirt basements. Although these are less common in this day in age, it's good to point out this dirt floors not just hold a huge amount of moisture but also can give off a number of gases. When constructing a cellar, make certain that you have a floor drain using a trap installed at the bottom point of the ground.
Without a floor drain, any water that is spilled inside cannot escape. If necessary, install a sump pump and make sure that the sump cover is tightly sealed. Sump pumps are usually used where flooding because of a high water table may be a problem. Additionally, waterproof the outside of the base walls and put in a perimeter drainage system. A frequently overlooked problem in basements is moisture that comes out of humidity.
The simplest way to control humidity is to exhaust water vapor produced in the house to the outside. Signs of high humidity include condensation on walls, pipes or other surfaces as well an overall awareness of moisture in the atmosphere, dampness, and smells. Often, the humidity will be caused by exposing the cellar to outside air (open windows), having wet laundry hung to dry in the cellar, keeping firewood in the cellar, or a dryer vent that exhausts indoors.
To reduce humidity, there are numerous things a homeowner can do: install energy-efficient windows, insulate walls and cold water pipes, insulate floors if at all possible, run dryer vents to exhaust straight outside and don't dry laundry or firewood on your cellar. In summer, use a portable dehumidifier or air conditioning to reduce humidity. In warm, humid weather, keep cellar windows closed. Run the furnace fan continuously to circulate house air. The key to keeping basement humidity low is to keep them well ventilated and keep extra moisture from the cellar.