Attic spaces are tough to work in. Since they are outside the “living space” of your home, finding the right flooring solution requires special consideration. However, flooring your attic can make it a perfect place for storage. Doing so the wrong way means that you could weaken your structure, squash your insulation or worse, find yourself with one foot planted firmly through the sheetrock ceiling below!
Fortunately, there are attic flooring solutions that work well in the often harsh and unheated environments. Here’s where to begin:
When medical students complete the many years of study it takes to become a doctor, they ceremoniously take the “Hippocratic Oath” at graduation. This oath includes well known words that homeowners who are considering flooring their attics are wise to remember: first do no harm!
Alt=how to floor an atticFor the most part, attics were not designed as storage spaces. They are a part of the raw underbelly of structure that holds a house together and protects it from the elements. Because of this, installing a floor to an attic always involves some level of disturbance.
If the roof structure of your home was designed with prefabricated trusses, your attic was definitely not designed for any storage. There are several reasons for this. First, adding weight to the top of the bottom 2x4 that makes up the truss is a big no-no. Roof trusses are specifically designed to take the weight of the roof (and the snow, wind, rain, etc.) and distribute it downward and outward to the load-bearing exterior walls through a series of interconnecting wood framing pieces known as “chords". Adding storage to any other part of this finely tuned structural marvel risks weakening the roof system.
If your home was built with standard conventional lumber, your risk of causing structural imbalance isn’t nearly as high; however, you still need to be sensible when installing an attic floor. Remember that the ceiling joists were designed to hold up a ceiling and not to support a floor loaded with your Encyclopedia Britannica collection!
Lastly, your home’s energy efficiency almost always suffers when the attic is converted for storage. Since an average attic needs 10 inches or so of insulation, the insulation is always thicker than the ceiling joists or trusses. As such, adding a floor can cause the insulation to compress, thus squeezing out the insulating ability of the fiberglass.
With all these challenges, you might start thinking that attic flooring installation is impossible. It isn't, but you’ll need a dose of common sense to execute the job of installing an attic floor properly. Here are a few tips to help you and your house get through the job unscathed.
Also, if the attic insulation  is thicker than your ceiling joists, you can raise the height of the joists to above the insulation by attaching 2x3’s to their top edge before you attach the floor boards.
On our radio program The Money Pit , we open each and every hour by inviting calls from “floor boards to shingles.” If your question is about how to install attic flooring, there are lots of fabulous attic flooring solutions and choices!