Smart Attic Storage

One hiding spot for energy savings in homes is also a common location for storing holiday decorations and infrequently used sentimental items: the attic.

Using your attic for storage is tempting but, if not done properly, can be problematic when trying to maximize your home’s energy efficiency. Let’s explore how you can improve insulation levels and properly store items in your attic.

Attic insulation is one of the best low-cost ways to make your home efficient. People often associate insulation with keeping your home warmer in the winter, but it also provides benefits in the summer. Insulation reduces heat transfer from the attic to the house, which lowers energy bills for air conditioning and makes your home more comfortable.

Attic insulation is measured in R-value, which is a measurement of how well a material resists the flow of heat. For attic insulation, thicker is better (the higher the R-value, the greater the insulating power). The recommended R-value is typically between R-38 and R-60, depending on regional climate. North Carolina building code requires at least R-38 for ceilings and in the attic. In most homes, the ceiling joists are buried in insulation to achieve the recommended R-value.

Attic insulation is one of the best low-cost ways to make your home efficient. People often associate insulation with keeping your home warmer in the winter, but it also provides benefits in the summer.

The problem with attic storage is it typically doesn’t offer enough space for the recommended R-value. Often, plywood or boards are placed directly on top of the ceiling joists, which isn’t enough space for the insulation. Insulation can get compacted by people moving items in or out, reducing the effective R-value.

Ideally, the attic would not be used for storage so it can be properly insulated, but that’s not feasible for everyone. Here are some strategies for maintaining attic storage and recommended insulation levels.

The best location for attic storage is over an unconditioned area of your home, such as the garage. You don’t need insulation in attic spaces over a garage or unconditioned area because you are not heating or cooling the space below. This makes it the perfect spot to tuck away items for storage.

If that isn’t an option, consider minimizing the number of stored items or the storage area’s footprint. A great way to do this is by building an attic storage platform. A raised platform allows the space underneath it to be fully insulated. These platforms are available in ready-to-install kits, or you can buy materials and build them yourself.

Allow enough space underneath the platform to achieve the proper R-value. Use lumber to build a frame perpendicular to the existing joists and cover it with plywood or oriented strand board. Once your storage area is set up, add insulation inside the platform to bring the R-value up to the proper level.

Your attic might also have trusses that allow you to build shelves and maximize space by storing items vertically.

Always wear a dust mask or respirator when working in the attic. Don’t forget to weatherstrip the attic hatch to ensure a tight seal (see “Batten Down the Hatch”). Take a look around your attic to see if you can find any hidden opportunities for energy savings.