An average Louisiana house can get as hot as 140 degrees in the summer, and that hot air can leak into the conditioned space. This is the importance of air sealing in the house, but to reinforce the effects the attic should be insulated to a sufficient level without gaps. Insulation slows down the heat transfer from a hot to a cool area but the air sealing effectively stops it. This is because this heat is in the air which can travel through the smallest gaps into the living space.
There are several types of insulation on the market, but Posigen upgrade crews use two in particular. For small patches or attic knee walls require fiberglass batts. These are the rolls of pink, white or yellow fibers that can be cut to fit a space and rest in the joists on the floor or wall. Fiberglass batts suffer from the reputation of not being effective, but this is due to incorrect installation. Posigen upgrade crews are trained to ensure there is no compression or gaps, and that each batt is cut to fit the space required.
The insulation of choice for larger spaces such as the whole attic is cellulose. This is called loose-fill insulation because it is sprayed in from a hose and sits on the attic floor like snow. This is a common insulation in newer houses because of its low cost and high effectiveness at reducing heat transfer. It is made from recycled newspaper and other fibers that are sprayed with a flame retardant. Another advantage of cellulose is that it can be sprayed to a high level, or even on top of old fiberglass that needs some reinforcement.
If insulation is recommended for a house, it is important that it is installed correctly. Improperly installed insulation can reduce the effectiveness by as much as half. Blown-in insulation should be installed to a uniform level throughout the attic and without gaps around drop ceilings or fireplace chases. Since air moves from hot to cold, it will leak into the house through the weakest air and thermal barrier. This is why it is important to insulate the attic access as well.
Even if the attic is already insulated, there may be gaps that need to be filled because they are compressed or torn up over years. Repairing or replacing these sections can be quick, simple fixes that provide quick savings that can be felt in the hot summer.
When installing insulation, especially blown-in, the attic should be cleared of all possible obstructions to allow for proper and complete insulation.