In the past, basements and cellars were generally not considered part of a home’s living space and, therefore, the best insulation for basement walls was to have no insulation at all. Many basements are now included in the home’s living space and are likely to be temperature-controlled. Proper insulation methods must be utilized to ensure [...]
Basement Wall Insulation – The Details You Need To Know
One great way to save some money is by making sure you have adequate basement wall insulation. By insulating basement walls, you can keep heat in during the cold months and keep any cooled air in during the warmer months. There are many types of insulation, and you should consider which type you want to get the best insulation for basement walls. Beyond that, you will also need to decide whether the insulation will be installed in the exterior or interior wall. Here is some information to help you with your basement wall insulation.
TYPES OF BASEMENT WALL INSULATION
Blanket Insulation
When you think of how to insulate basement walls, the most common type that comes to mind is called blanket insulation or batt and roll. It comes on a large roll and is made up of natural fibers and fiberglass and often protected with some sort of covering.
Foam Board Insulation
Foam insulation for basement walls is also available. Foam board is from polyurethane, polyisocyanurate or polystyrene. The foam is installed between the wall studs or glued in place. If you choose foam board, it is essential that you maintain the moisture in the basement, as the foam can absorb moisture and cause mold. Also, fire ordinances may require a barrier between the foam board and the interior wall of the basement.
Loose Fill Insulation
Loose fill insulation is made up of fiberglass, cellulose or wool. It is installed by blowing it into the spaces in the wall. This type is best for basements that are already finished.
Sprayed Foam Basement Wall Insulation
Spayed foam is installed in a similar way as loose fill insulation. It used a foaming agent and liquid foam. It is difficult to install and requires certification and special equipment to be able to install it properly. Most building codes will require a second barrier such as drywall when using this type of insulation.
WHERE TO INSTALL
Exterior Basement Wall Insulation
Most often, insulation that is installed in the exterior wall is referred to as a conditioned space. It makes the basement connected to other living spaces. Some advantages to insulating the exterior wall is that it requires less insulation material. It also continually manages air and thermal leakage and stops moisture intrusion. It can also help minimize heat loss in the house foundation and help to protect any damp-proof coating.
It does however, have its disadvantages. Insulating the exterior basement wall can get expensive, depending on the type of material you select and how it is installed. Another drawback is that some insulation materials are prone to getting infested with insects. Also, if the soil around your home contains radon, your house will need a mitigation system installed under your basement floor.
Interior Basement Wall Insulation
Interior insulation is done by adding insulation into the foundation of the wall. It is often more cost effective then exterior insulation. Another great advantage to this type of insulation is that you can use almost any type of insulation you choose, giving you a wider selection. There is also no possibility of insect infestation as there is with exterior wall insulation. The cold is also isolated more effectively with an interior method.
As with exterior wall insulations, there are some disadvantages to interior ones as well. Many types of insulation will require some sort of fire protective covering since they can release toxins if they happen to become ignited. It can also reduce interior space by a few inches, so if space is an issue than this method may not be ideal for your basement. Interior wall insulation also does not protect against dampness as exterior insulation does.
CONSIDERATIONS
Once you have decided what type of insulation you want and how it is going to be installed, there are still a few things you should consider and remember. Keep in mind that air sealing your basement is just as important as using insulation. Air moving in and out can affect the air and raise your heating and cooling bills. You can use a foam spray to seal any space between the walls to thoroughly insulate the basement. Be sure to also repair any water leaks before starting your insulation installing. This will prevent future problems with seepage into the insulation, as well as increased water bills due to wasted water.
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