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A house is a system of interdependent parts which means that the operation of one part will affect the other. When one of the house parts is not functioning properly it will affect the other parts.

A home loses heat through three methods, which are: conduction, convection and radiation. Conduction is probably the best known and the easiest to understand mode of heat transfer. It occurs when a material separates an area of high temperature from an area of low temperature, such as a wall separating a warm interior from a cold exterior.

Forced convection occurs when the movement of liquid or gas is caused by outside forces. For example, a cold wind blowing across a warm outside wall will cause heat to transfer through the wall more quickly.

Sealing ducts gets conditioned air where it belongs, reducing the need for extra space heaters in rooms far from the heating source. Air sealing and insulating the attic prevent warm, moist air from escaping, reducing residents’ heating bills and preventing ice dams and the costly repairs associated with them.

Recessed lights are very popular, but they are usually the source of considerable heat loss or gain in a ceiling. The recessed lights when scanned with an infrared camera will show a lot of heat loss. The solution is to buy lights that allow you to cover them with insulation thus preventing heat loss.

Ice damming and roofing material damage can be caused by improper attic ventilation. This can be prevented by installing attic baffles at the eaves to maintain ventilation. Baffles also prevent wind from flowing through the insulation, which can reduce its R-value.

Insulating sheathings are rigid insulation boards, typically to 2 inches thick, that have beneficial thermal properties. They provide a way to increase the overall R-value of the wall system, especially in colder climates.
Products that are available are typically made of expanded or extruded polystyrene or from polyisocyanurate foam insulation boards.

With a properly functioning ventilation system, moisture and other pollutants are kept from entering the home. Any pollutant – and moisture is considered a pollutant for the purposes of this discussion – created in the home is transported safely outside through exhaust ventilation and ductwork. However, in many homes, the fans or ducts are loud, leaky, non-existent or otherwise not up to the job. Moisture created within the home condenses on cool building surfaces, both in the living space and in the attic, and causes mold, mildew, poor IAQ, and structural damage.

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