Achieving a lasting paint finish during the colder months can be challenging. Many people ask: Can you do exterior painting during winter? The short answer is yes, but several factors affect whether or not you achieve a lasting paint finish. Temperature plays a major role in determining paint adhesion, but that doesn’t mean you have to wait until spring or summer to give your property a new makeover.
Why Cold Weather Affects Exterior Painting
Most paints are formulated to cure within a specific temperature range, usually above 50°F. When the temperature drops, it changes the paint’s consistency, its adhesion, and how easy it is to apply. This means you often won’t get the results you expected, because the paint won’t cure or dry as intended.
Poor Adhesion
When the temperature drops too far, paint can’t adhere to the surface as it should. Instead, it sits atop it. The problem may not be noticeable right away, but you will notice the damage within weeks or months.
Bubbling or Cracking
In cold conditions, paint often dries unevenly. The exterior layer may dry quickly, but the inner layer remains wet. This uneven drying can lead to cracks, trapped air, and bubbling in the paint’s surface over time.
Extended Drying Times
During cold weather, when the temperature significantly drops, paint dries very slowly. This extended drying time leaves the fresh layer of paint vulnerable to moisture, dust, or any debris in the environment.
Reduced Durability
Paint that doesn’t cure or dry properly won’t last long. It will fade faster, chip easily, and deteriorate far before its expected lifespan.
What Temperature Is Too Cold to Paint Outside?
Most paints perform poorly if the temperature drops below 35°F. As the temperature decreases, the paint thickens, which affects its ability to flow and bond to the surface. This can lead to a rough, uneven paint layer and long-term damage.
Latex Paint
Most latex paints need at least 35°F to cure properly. However, some specialized latex formulas are designed to handle lower temperatures, with special additives or coalescing agents that soften the paint particles.
Oil-Based Paint
Oil-based paints are known to handle temperature better than other types of paints. Standard oil-based paints can generally work in temperatures up to 35°F, while some specialized paints go down to a bit lower temperatures. However, these paints need more time to dry properly than latex paints, which can be problematic in colder climates.
Surface Temperature
You need to check surface temperature rather than just air temperature, as wall surfaces are usually colder than the air temperature in cold regions. Metal surfaces are particularly problematic, as they radiate heat quickly. Use a surface thermometer before painting to determine whether or not the material is ready; this can save you from costly redos.
Drying and Curing
Paint can take several days to dry and cure properly in cold weather, so keep an eye on the weather forecast. This lets you know if temperatures will remain high enough to paint over the next few days.
Humidity
Cold air usually has high humidity. As the temperature drops, humidity also rises, which can affect the drying process. The humidity level for exterior painting should not exceed 70%.
Check Manufacturer’s Recommendations
Not all paints are made with the same formulation. Each paint has specific temperature requirements, which you can find on the label. Always read these beforehand, and never ignore them; the information they offer is invaluable.
When Is It Safe to Paint in Cold Weather?
If you’re planning to paint in the cold weather, you need to be prepared. Exterior painting in the winter is possible; it just involves assessing several critical factors.
Air and Surface Temperature
To maintain consistent and durable results, the air temperature should stay above 45°F. The safest way is to paint during the warmest time of the day so that the paint has enough time to set on the surface. If the air temperature is 45°F, the surface temperature may only be around 35°F, so use a surface thermometer to check before you begin.
Dew Point
Below the dew point, the water in the air begins to condense. Make sure to check the dew point on your weather app before you commit to the project. If there’s too much moisture in the air, the paint won’t adhere properly.
Drying Time
Cold weather slows down the drying time. What takes two hours during summer may take a full day in winter. This means a higher risk of paint getting wet and forming cracks. It is best to start during the warmest part of the day, so you have several hours of warm weather ahead.
Paint Type
Paints like SuperPaint Exterior Acrylic Latex by Sherwin-Williams are suitable for temperatures as low as 35°F. Such paints can withstand frost, peeling, and fading, increasing the durability of the paint finish. You can also get oil-based paint for cold weather conditions, but make sure to check the labels and buy from trusted manufacturers for durability and high performance.
Indoor vs. Outdoor Painting
Painting indoors during winter is usually fine even when it’s freezing outside. Interior spaces are more climate-controlled, so you’re not dealing with humidity or lower surface temperatures. Plus, the paint dries faster, creating an excellent finish without much hassle. On the other hand, painting outdoors can be challenging, as most of the factors affecting the final results are outside of your control.
Proper Surface Preparation in Cold Weather
Surface prep is the most essential part of the painting process, especially in cold weather. It determines whether your paint job will succeed or fail.
Ensure all Surfaces Are Clean and Dry
The surface needs to be completely clean and dry for proper paint adhesion, but dirt and grease don’t wipe away easily during winter. If you wash the surface, it may appear dry, but the pores could still be trapping moisture. Often, surface preparation in winter requires specialized cleaning solutions to remove dirt or contaminants, and waiting a day or two for the surface to dry properly.
Pressure Washing
If the surfaces have dirt or mold that won’t come off with simple cleaning, you may need to try power washing. This uses a high-pressure water jet to clean the surface. Make sure to use low pressure to avoid damaging soft or weak surface material, especially if you are dealing with wood. Remember to check that the temperature is above the freezing point; otherwise, you may deal with ice coating your surfaces.
Scraping and Sanding
All loose or peeling paint needs to be removed before you apply fresh paint. Try using a scraper on any areas showing chips and cracks. Once complete, make sure the area is dry, and prepare to sand. Apply gentle pressure with a sanding block and clean up any dust left behind.
Use Moisture Meters for Wood
Drying the wooden surface can be tricky during winter. It may appear dry on the surface, but the pores tend to gather moisture underneath. So, make sure to use a moisture meter to confirm the moisture is completely gone, and avoid painting on a damp surface.
Tools and Applications for Cold Conditions
Exterior painting during winter is possible, especially when you use the right tools and techniques. They’re the key to achieving a flawless paint finish.
Use a High-Quality Synthetic Brush
Professional-grade synthetic brushes are designed to achieve a more consistent paint finish. They’re made with high-quality polyester or nylon bristles, so they can handle cold temperatures better than natural-bristle brushes that absorb more water and stiffen in cold weather.
Apply Thin Coats to Prevent Sagging or Dripping
Using thick coats of paint in cold weather is a bad idea. It interferes with paint adhesion, prevents the paint from flowing evenly, and eventually sags and chips. Thin paint coats trap less moisture and dry quickly, so they’re better suited for cold weather.
Stir Paint Often
When painting in cold weather, make sure you’re stirring the paint often. As paint tends to thicken in cold temperatures, stirring keeps the paint from thickening, allowing it to spread uniformly on the surface. It is best to stir every 10-15 minutes if the weather is colder.
Warm Paint Indoors Before Using it Outside
Store the paint indoors to keep it warm and prevent it from thickening. Warm paint flows better and stays workable longer outdoors, so bring it out only right before painting.
Store Paint and Tools in a Warm Area Overnight
Leaving paint and tools outside overnight in freezing temperatures can ruin them. Paint will freeze and become unusable, and the tools will stiffen, making them harder to work with.
Common Mistakes to Avoid
Without the right experience, mistakes are common. By planning ahead, learning what to watch for, and preparing for potential challenges, you can avoid these common problems.
Painting When Temperatures Dip Below Recommended Limits at Night
It is best to hold off your painting project when the temperature drops below 35°F. If it’s too cold, the paint needs much longer to dry and cure, or it may fail to adhere to the surface.
Rushing the Dry Time Between Coats
During winter, the paint layer doesn’t dry as quickly as in the summer heat. If you rush to add another layer of paint before the previous layer has dried properly, you’re risking failure.
Painting Wet or Frosty Surfaces
Wet surfaces are bad for paint adhesion. But people often make the mistake of painting the damp or frosty surfaces during winter. To avoid this mistake, use a moisture meter so you don’t have to rely on guesswork to determine if the surface is dry enough for paint.
Not Using Cold-Weather Paint
Standard paints are often less suitable for cold weather. Make sure to purchase paints formulated with special components that withstand low temperatures.
Using Leftover Paint From Summer
It may feel tempting to use leftover paint from your summer painting project to cut corners on cost. But it may lead to uneven paint finish and early damage. Old paint tends to thicken and separate over time, even when stored in an airtight container.
Should You DIY or Hire a Pro for Cold-Weather Painting?
If you are confused about whether to call professionals or take the matter into your own hands with DIY methods, it helps to consider the pros and cons first.
Pros of DIY painting:
- May save on labor costs by doing it yourself
- Gives you full control over scheduling and speed
- Satisfaction of completing the project yourself
- May learn something new and enhance your painting skills
Cons of DIY painting:
- High chances of costly mistakes
- May take longer than expected
- Risk of improper scheduling and planning
- Need to purchase several specialized tools
- High risk of compromise in the quality of the paint finish
- Physical discomfort from painting in cold conditions
Pros of professional painting:
- Expertise in handling challenges related to cold weather
- High efficiency and timely completion of the project
- Warranty coverage on craftsmanship and material
- High-quality paint finish that lasts for years without premature failure
Cons of professional painting:
- Labor cost makes the project expensive
- Less flexibility with scheduling
- Requires proper research to find a reliable contractor
- May need upfront cost
Final Thoughts
Exterior painting during winter comes with several challenges, but with the right approach, you can still achieve a flawless finish. Having the proper knowledge of what to look for and what to avoid can save you the hassle of costly rework and repairs down the line. If you’re looking for reliable local experts in Idaho, Boise Commercial & Residential Painting is your trusted partner. We work efficiently in Idaho’s cold winters, and we know how to make your investment worthwhile. Give us a call to schedule an inspection.
