The post 8 Things You Shouldn’t Store in an Unheated Garage Over Winter first appeared on Crafting Your Home.
The garage has a way of becoming winter’s waiting room.
Paint cans, extra pantry supplies, batteries, garden products, and seasonal leftovers often end up there because they are not used every day. But when an unheated garage drops below freezing, some everyday items can change in ways that are easy to miss until spring arrives.
Cold temperatures, moisture, and temperature swings can cause paint to separate, batteries to suffer damage, canned goods to freeze, and some chemical products to become unsuitable for use. Before the first hard freeze, a quick garage check can save frustration later.
Here are eight items worth moving to a more stable storage space.
Leftover Latex Paint
That half-used paint can sitting on a garage shelf may seem harmless, but winter temperatures can be a problem.
Sherwin-Williams says garages are among the worst places to store leftover paint because seasonal temperature changes can freeze paint in winter and expose it to high heat in summer. The company recommends storing paint in a more stable location, such as a closet, utility room, or suitable shelf in a dry basement, with temperatures around 60–80°F.
Freeze-thaw cycles can permanently change water-based paint’s texture. After frozen paint thaws gradually and is stirred, it may only be usable if it looks like fresh paint. Lumps, thickening, or solid particles mean it shouldn’t be used.
A small paint can may not seem valuable, but replacing it during a spring repair project can turn a simple touch-up into a larger job.
Spray Paint and Aerosol Cans
Spray paint is not just another item sitting on a shelf. It is a pressurized container that needs proper storage.
Sherwin-Williams recommends keeping spray paint upright, in a well-ventilated area away from direct sunlight and ideally between 50–80°F.
An unheated garage exposes aerosol cans to both winter cold and later seasonal heat, which is different from the stable environment manufacturers recommend.
Before storing these products, check the label and choose a dry, ventilated location away from ignition sources and out of children’s reach.
Related: Paint Colors That Can Look Worse in Sunny Rooms, According to Interior Designers
Rechargeable Tool Batteries
Cordless tools are convenient, but their batteries should not be treated like ordinary garage clutter.
DeWalt advises storing and charging lithium-ion batteries in a cool, dry location while avoiding liquids, oils, and extreme temperatures. The company’s safety guidance recommends keeping battery packs in a dry place at room temperature.
A cold garage does not necessarily ruin a battery overnight, but long-term storage in a space exposed to freezing temperatures and condensation can put batteries outside recommended conditions.
A better option is to bring batteries indoors, keep them dry, and follow the manufacturer’s storage instructions.
Disposable Household Batteries
The battery drawer may be convenient, but the garage is not the ideal backup location.
Energizer recommends keeping household batteries in a cool, dry place at normal room temperature. Its guidance warns against moisture and temperature extremes and notes that normal indoor conditions help support shelf life and performance.
The issue is not that cold automatically destroys every battery. Instead, temperature extremes and condensation can affect contacts, labels, or seals.
Unused batteries are better stored in their original packaging or an organizer inside a cool, dry cabinet.
Canned Food and Home-Preserved Jars
The garage often becomes an overflow pantry, especially before the holidays. But stored food can face problems when temperatures drop.
Oregon State University Extension warns that canned foods kept in unheated storage areas can freeze. It recommends keeping storage areas above 34°F, with 50–70°F helping preserve quality.
For commercially canned foods, a frozen can may still be usable if its seams remain intact, according to OSU Extension. It should be thawed gradually and stored at room temperature. Containers that are bulging, leaking, deeply dented, or cracked should be treated with caution.
The key is checking the condition of the container rather than assuming every frozen can is automatically ruined or automatically safe.
Related: 6 Items You Shouldn’t Put In the Recycling Bin
Liquid Pesticides, Herbicides and Garden Sprays
A shelf filled with leftover weed killer or garden sprays may look like normal garage storage, but these products have specific requirements.
The Environmental Protection Agency says pesticide storage directions depend on the product label. It also advises keeping pesticides in their original containers, away from children and pets, away from food and animal feed, and protected from spills or flooding.
Many EPA-registered labels specifically say to protect products from freezing or require storage above a certain temperature.
The safest approach is simple: read the label. If it says “protect from freezing,” an unheated garage is not the right winter home.
Household Cleaners and Water-Based Repair Products
Some items are easy to overlook because they do not seem like traditional winter-storage risks.
Water-based spackle, caulk, grout repair products, adhesives, and cleaning concentrates can have their own temperature limits. Behr’s multi-purpose spackling label, for example, says to store the product in a cool, dry place away from extreme heat or cold and specifically warns against freezing.
Not every cleaning product will be ruined in a cold garage, but labels that mention “protect from freezing,” “store above 32°F,” or temperature ranges should be followed.
Tender Plants and Overwintering Bulbs
A garage can sometimes work for certain dormant plants, but only if the temperature stays within the plant’s required range.
University of Minnesota Extension says poinsettias can be damaged below 50°F. It recommends specific temperature ranges for dormant lantanas and amaryllis bulbs and warns that bulbs needing cold treatment should not be allowed to freeze because they can die and rot.
The difference matters: cool and dormant is not the same as frozen.
Before storing plants, check their temperature requirements and move frost-sensitive plants indoors when needed.
Key Takeaways
Before temperatures fall, ask four questions about anything stored in an unheated garage:
- Can it freeze?
- Can it separate or lose performance?
- Can it leak, corrode, or create a safety problem?
- Would replacing it be expensive or inconvenient?
Paint, batteries, stored food, and garden products are often worth moving before a hard freeze.
That does not mean every garage item needs to come indoors. Many dry, nonperishable items can remain in a garage if they are protected from moisture, pests, and temperature-related damage.
Winter storage is not just about finding empty space. It is about knowing what your belongings can survive.
A few minutes spent moving the right items now can make the first spring garage cleanup much easier.
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