Attic Insulation - The Facts
The most popular varieties of insulating Attic Insulation Houston are fiberglass, cellulose, and spray foam. As you can clearly see from the illustration above, there are substantial differences in the advantages that these various materials have to offer. Let us have a more in depth look at all three materials to determine which is best suited for the specific requirements of your attic. Hopefully this will assist you in making a decision about which type of insulation is best suited for you.
Fiberglass Attic Insulation: Fiberglass attic insulation is popular due to its relatively high R value. This means that it reduces air leaks, is rigid, and does not contract or expand when temperature changes are experienced. Unfortunately, while all of these characteristics are great, they come at a price. Air must travel much faster through fiberglass than any other material. It is also prone to mildew, which can cause damage to wooden components.
Spray Foam Insulation: Fiberglass is a good choice for insulating attics in mild climates as the R-value is quite high. However, in hot climates spray foam insulation is ineffective. In addition, fiberglass is susceptible to weathering and won't last very long. Spray foam is often used in conjunction with cellulose to provide a tight, secure fit. Unfortunately, spray foam is expensive, can be severely abrasive on wood surfaces, and doesn't hold up well over time.
Quilting/Rip-Insulated Attic Insulation: There are several different varieties of insulation that use quilting techniques to achieve their results. Two of the most popular varieties are rolled and wrapped R-values. When properly insulated attic insulation utilizes these techniques, the R-value is enhanced so the seams are tightly sealed and air flow is increased. The drawback to this type of product is it is more difficult to install. In addition, it does not create the tight seams created by spray foam and fiberglass.
Rigid Cellulose Attic Insulation: This type of Attic Insulation uses cells of plastic called polystyrene. It is often combined with sheets of fiberglass to create an attic insulation product. While rigid cellulose has a lower R-value than spray foam and fiberglass, it is far more resistant to abrasion and warping. As a result, this form of product does not need to have as much reinforcement placed within the walls. Additionally, this type of insulation is much more expensive than its spray foam or fiberglass counterparts.
Non-Rigid Fiberglass Attic Insulation: Surprisingly, this type of Attic Insulation is not really an insulation at all. It is actually a vapor barrier. These products do not contain cells of plastic. Instead, it is composed of thick vapor membranes. Surprisingly, it has a higher R-value than either rigid cellulose or spray foam.
Spray Foam Attic Insulation: Spray foam is one of the least expensive forms of attic insulation available. However, it creates the tightest seals of any of the types mentioned above. This allows it to be used in conjunction with many older homes' existing insulation. Many older homes already have foam installed between the floors and the rafters. If sprayed foam is used along with traditional fiberglass or spray foam, the efficiency of the latter two systems can be improved.
The best way to keep your attic insulated is to make sure it has no leaks. You can also use non-motorized window-closures to prevent drafts from getting into your home in the first place. Lastly, inspect for energy bills that are high by looking for areas where air is being pushed in but not escaping. Attic insulation should be considered on an individual basis. Your local insulation company can assist you in determining the best type of under-insulated material for your needs, but it is best to get price quotes from several different contractors before making your decision. This way, you will know you are getting the best value.
