
Attics are often used as storage spaces, but certain items should be kept out due to extreme temperature changes and high humidity. Paint cans, for instance, are not recommended for storage in attics. Oil-based paints are highly flammable, and latex paints can break down under extreme temperatures, becoming unusable. Additionally, high heat can cause humidity, leading to potential damage to wooden items and electronics. To preserve the quality of paint and other temperature-sensitive belongings, it is best to store them in a controlled environment away from the extreme conditions of an attic.
| Characteristics | Values |
|---|---|
| Ideal storage temperature for paint | Cool but not freezing |
| Effect of temperature on paint | Paint freezes and breaks down under extreme temperatures |
| Attic temperature | Very hot during summer months |
| Effect of attic temperature on paint | Paint is fine |
| Attic characteristics | Prone to high heat and humidity, unfinished, uninsulated, prone to temperature fluctuations |
| Items that should not be stored in attics | Flammable items, electronics, photographs, papers, food, wooden items |
| Items that can be stored in attics | Pots and pans, artificial Christmas trees, holiday decorations, luggage and suitcases, sports gear, vases and ceramic knick-knacks |
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What You'll Learn

Paint cans are best stored in a cool, dry place
Oil-based paints are highly flammable, and the high temperatures in attics during the summer increase the risk of fire. Latex paints, while non-flammable, can also deteriorate under extreme temperatures, becoming unusable. The heat can cause the paint to break down and separate, affecting its performance.
Additionally, attics are susceptible to high humidity levels, which can impact the quality of stored items. Humidity can cause photographs to stick together and become damaged when pulled apart. It can also lead to mould growth on photos, books, and documents. Humidity can also affect the performance and lifespan of electronics, causing circuitry to blow.
Instead of storing paint in the attic, it is recommended to keep it in a temperature-controlled environment, such as a spare cabinet or a laundry/storage room. The ideal storage location for paint cans is a cool, dry place, where the temperature does not drop below freezing. Storing paint in a controlled environment will help maintain its quality and longevity.
If you must store paint in the attic, it is crucial to monitor the temperature and ensure proper ventilation and insulation. However, due to the potential risks, it is generally advisable to avoid using the attic for paint storage.
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Attics experience extreme temperature fluctuations
Paint, for example, is sensitive to temperature changes. Oil-based paints are highly flammable and should not be stored in hot attics. Latex paints break down under extreme temperatures, becoming unusable. The high heat can also cause the paint in cans to spoil and rust, especially if the cans are in contact with a cement floor. Thus, it is recommended to store paint in a temperature-controlled environment, such as a spare cabinet or closet.
Wooden furniture and items are also vulnerable to temperature and humidity changes in attics. Wood may swell and contract, causing cracks and damaging fine wooden finishes. The colour of stains may change, and fine lines may appear, degrading the smoothness of varnishes.
Electronics and perishables are other items that should not be stored in attics due to extreme temperature and humidity fluctuations. The heat and humidity can cause electronics to malfunction or stop working altogether. Perishables can easily spoil in the humid, warm temperatures, and the heat can "cook" canned goods before they can be consumed.
Overall, when considering storing items in an attic, it is essential to be mindful of the potential for extreme temperature fluctuations and the damage it can cause to sensitive items.
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Oil paints are flammable and a safety hazard
While attics can be a great storage solution for some items, they are not always the best option due to extreme temperature fluctuations. The temperature in an attic can reach 35-40 degrees Celsius in the summer and freezing temperatures in the winter. These fluctuations can damage certain belongings, such as wooden furniture, which may warp or crack over time due to the changing temperatures and humidity levels.
Oil paints are flammable and pose a safety hazard, especially in a hot attic. Oil paint is considered extremely flammable and is even banned from being brought onto airplanes. The flashpoint of oil paint, or the temperature at which it catches fire, is under 60 degrees Celsius, which is relatively low. Oil paint also contains VOCs (volatile organic compounds), which the U.S. Environmental Protection Agency warns may have adverse health effects.
Oil-soaked rags are particularly dangerous and have been known to spontaneously combust. The risk of fire is further increased when oil paints are used with solvents, such as turpentine or odorless mineral spirits, which are highly flammable and create fumes. These fumes can be dangerous to inhale and can ignite if they come into contact with an open flame. Even when not in use, oil paints and solvents should be stored in a cool, dry place, away from any potential sources of ignition.
To reduce the risk of fire, proper ventilation is crucial when working with oil paints. Sealed containers can help to prevent the buildup of fumes, and stainless steel or other sealed containers can be used to store oil-soaked rags safely. It is also important to consult the safety data sheets (SDS) available online for specific chemicals to ensure proper handling and storage.
Overall, while it may be tempting to store paint cans in the attic to save space, it is not recommended due to the potential safety hazards associated with oil-based paints. A dry environment with consistent, cool temperatures is a much safer option for storing paint cans.
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Latex paints break down under extreme temperatures
Paint is a complex mixture of chemicals that break down over time. Latex paint, in particular, has specific shelf-life considerations that homeowners should understand. Firstly, it is important to note that unopened latex paint typically lasts between 2 and 10 years, depending on storage conditions. Once the paint can has been opened, you can expect the paint to remain usable for about 1 to 2 years if it is properly resealed. The key to extending the life of latex paint is to maintain an airtight seal and store it in a temperature-controlled environment.
Storing paint in a hot attic can be risky due to the extreme temperature fluctuations that most attics experience. These changes in temperature can negatively affect the longevity of the paint. While it is generally worse for paint to freeze, high temperatures can cause volatile chemicals in the paint, including water, to evaporate faster than normal. This can result in the paint developing an unpleasant odour, becoming lumpy, or changing consistency.
Additionally, temperature fluctuations can cause wooden items stored in the attic to expand or contract, potentially leading to warping and cracking over time. This can also affect the colour of stains and lacquers and cause fine lines to appear, degrading the smoothness of varnishes. Therefore, it is recommended to store paint cans in a dry environment where the temperature stays cool but does not get below freezing.
It is worth noting that some paints, such as chalk paint, have specific storage requirements. Chalk paint should be kept in tightly sealed containers and stored in cool, dry locations away from direct sunlight. Acrylic paint, on the other hand, typically lasts between 2 and 10 years when stored properly. While it shares similarities with latex paint, it contains different binding agents that affect its shelf life and performance over time.
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Humidity can ruin photos and electronics
Paint cans are best stored in a dry environment where the temperature stays cool but does not get below freezing. While freezing temperatures can ruin paint, extreme temperature fluctuations can also damage belongings stored in attics. Therefore, it is not recommended to store paint cans in a hot attic.
Now, onto the issue of humidity. Humidity can indeed ruin photos and electronics. Relative humidity, or the amount of water vapour in the air, is the most important environmental factor in preserving photographs. High levels of humidity (50%-100%) cause oxidation, fading, and the spread of fungus, while low levels (0-30%) can make photos brittle and shrink unevenly. The ideal relative humidity for storing photos is 40%, which may be difficult to achieve at home. The best environment for photos avoids extreme fluctuations between high and low humidity levels and has a consistent temperature. Therefore, places without temperature control, such as attics, are not recommended for storing photos.
In addition to photos, electronics can also be negatively impacted by humidity. Humidity can affect the internal electronic parts of appliances and cause rust and mould. Cameras, in particular, can be damaged by high humidity, which can cause lens fogging and fungal growth. To protect cameras from high humidity, photographers can use silica gel packets, lightbulbs, or electronic dry cabinets to keep their equipment dry.
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Frequently asked questions
Paint cans are not recommended to be stored in a hot attic. Oil paints are highly flammable and latex paints can break down under extreme temperatures, making them unusable. The best way to store paint cans is above the floor, on shelves, in a dry and cool environment where the temperature does not get below freezing.
Extreme temperature fluctuations can cause the paint to deteriorate and become unusable. High heat can also increase the risk of fire, especially if there are other flammable items stored nearby.
Yes, paint cans can be stored in a temperature-controlled environment such as a spare cabinet, basement, or garage. If you don't have enough room, you can transfer leftover paint to smaller airtight containers and store them in a cool, dry place.











































