The holiday boxes come down from the attic in November and go back up in January, and that annual trip is a good moment to ask what else is up there. Heat, humidity and pests turn an attic into one of the hardest places in a house to store things safely, according to home experts quoted by Apartment Therapy and Best Life. Seven categories of belongings come up again and again.
Where Summer Heat Does the Most Damage
Attics swing from freezing to sweltering, and the contents of the boxes pay for it. Electrician Robert Hand, quoted by Apartment Therapy, is blunt about the first three items.
1. Paint
Oil-based paint is highly flammable. Latex paint is not, but it suffers anyway. “Latex paints break down under drastic temperature changes,” Hand said, which leaves the leftover can unusable. The cold-weather version of the same problem is covered in a look at things never to store in an unheated garage this winter. More household habits worth a second look turn up in boomer habits that are making a comeback.
2. Food and wine
Summer heat “will cook” canned goods before the can is ever opened, Hand told the site. Pests are the other risk: real estate agent Jeff Young reported that rats ate an earthquake kit of food that a client had stored in an attic. Best Life’s organizer, Lauren Saltman of Living Simplified, widened the warning to bulk pet food and birdseed, since pests find them even in sealed plastic containers. A pantry or cool closet is the safer home. Anyone hosting this season may also want to read a comparison of Shark and Bissell vacuums for getting the house guest-ready.
3. Electronics
Even outdated devices are at risk. Hand warned that in the heat “the circuitry can blow, and they’ll be ruined forever.” Saltman added VCRs, CD players, hard drives and discs to the list, because extreme temperatures damage wiring and media alike. Devices that are no longer used can be recycled instead of stored. Heat is also behind the rules for using a space heater safely, and the holiday season brings its own electrical reminders in things never to do with holiday lights. Seasonal customs that outsiders find puzzling are rounded up in odd American traditions that confuse the rest of the world.
What Heat and Humidity Do to Keepsakes
4. Records, documents and photographs
Humidity makes photos and papers stick together, and heat warps vinyl. Hand described record albums that warped and family photos that were ruined “because they’ve stuck together.” Terry Crisler, a Sotheby’s agent, said that “Delicate items just don’t hold up with temperature fluctuations.” Saltman named birth certificates, tax returns and photos specifically, saying that “both heat and moisture are not friends to these items.” A tightly sealed container is the minimum if an attic is the only option. Nostalgia-heavy boxes are a theme in household items only children of the 1980s will remember. Small rituals tied to old household objects are the subject of little rituals from the 80s and 90s that disappeared.
5. Anything wooden
Heat and humidity warp wood, which puts wooden furniture and musical instruments at risk. Apartment Therapy warned that antique furniture could be ruined and that guitars and other wooden instruments could break apart. Saltman pointed to mold as the other threat, saying that “Any item that is susceptible to moisture is a concern in the attic because of mold.” Outdoor furniture is the exception she considers fine to keep there.
Fire Risks and Fragile Holiday Boxes
6. Highly flammable objects
Propane tanks, oil lamps, kerosene heaters, aerosol cans and batteries can explode in summer heat, according to Apartment Therapy. Saltman also listed turpentine and paint as fire risks and suggested a well-ventilated garage or a detached garden shed instead. The EPA, on its household hazardous waste page, says to follow the storage instructions on product labels and keep products in their original containers.
7. Delicate holiday decorations
Antique ornaments made of balsa wood or other fragile materials will not survive attic conditions, Apartment Therapy said. Sturdy tree ornaments and synthetic garlands are fine, so the advice is to separate the fragile pieces from the durable ones. Hand added that the compressors and air pumps for inflatable lawn figures “need to be stored carefully.” Best Life’s Tim Jankowski of Aladdin’s Cleaning & Restoration made a related point about fabrics, saying that silk, wool and linen “are prone to becoming infested with carpet beetles and moths,” so rugs and drapes need at least vacuum sealing.
Best Life also warned against cardboard boxes, which break down over time and attract mice, and recommended sturdy plastic bins with secure lids, labeled on the outside.
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This article was produced with AI assistance and edited for accuracy against the sources linked above.
Image: Chris Light – CC BY-SA 4.0/Wikimedia Commons
