If you use your garage as a storage space,you’re not alone. Unfortunately, because the space isn’t climate-controlled, it's best to keep these items elsewhere, according to Realtor.com:
Pollutants, moisture and heat can quickly destroy your photos. Digitizing all photos
is the best practice, or keep printed copies in a dry area inside your home.
These should never be kept indoors or too close to your home because they can leak
or ignite. Store them outside on a flat surface instead.
Batteries can be greatly affected by external moisture. Don’t store them on the
floor, rather, place them on a piece of wood or cardboard.
ARTWORK & COLLECTIBLES
Dampness can cause tarnish and mold to grow. Insects can infest and rodents can
feats on certain items. Dirt and dust can cause stains and buildup on most
anything. And car fumes can penetrate textiles and canvases. Keep prized possessions indoors.
Unless you have a refrigerator or freezer in your garage, fresh food can attract
vermin even in a sealed container. Canned foods are best indoors, as
sweltering heat can hasten their spoilage, and freezing temps aren’t great either.
If not sealed correctly and exposed to extreme temperatures, paint can actually spoil.
Find a space that's dark, dry and cool like a utility closet, laundry room or mudroom.
CARPET & RUGS
Fresh air is vital for rug fibers, and garage spaces aren't usually well ventilated,
which can cause mold and mildew. Store in a place with low humidity levels.
Or if the garage is your only option, block any direct sunlight and place a dehumidifier near it.