The ideal temperature range for application is between 50 and 80 degrees and it is important to choose a day when no rain is expected for 24 hours.
If the temperature drops below that 50 degree mark at night, your stain may not cure properly.
Avoid the Cold
If you're staining your deck in the spring or fall, wait for a day with temperatures above 50 degrees Fahrenheit. Also, check to see if freezing temperatures are in the forecast for that night. It can hinder the curing process if it drops below 32 degrees Fahrenheit before the stain has thoroughly dried.
Staining to early not only causes a poor finish but it can also cause the wood to dry unevenly which will cause warping issues.
Ideal temperatures to stain a deck are between 50-90 degrees. Check the weather! Ensure that weather elements won't add unwanted moisture 1-2 days before and after application.
Many people don't realize that early spring and summer are not the best time to apply stain to a deck. Wood absorbs humidity and accepts new treatments best when it's dry, so staining too early in the spring may lead to peeling or cracking.
Most stains can be applied from about 50° F to 90° F — but many people don't realize this range refers to the temperature of the wood surface, not the air.
Another way of checking if your wood is ready for stain is to pour a little water on the wood. If the water beads up, the lumber still too wet to be stained or painted. If the water is absorbed into the wood easily, it's ready to be sealed or stained.
A FEW TIPS BEFORE YOU GET STARTED STAINING YOUR DECK
Apply stain when air and wood surface temperatures are between 50°—90°F. Avoid applying in direct sunlight. Don't apply stain if rain is in the forecast over the next 12—24 hours. Test a small area first and let it dry to make sure you're pleased with the result.
You can also leave the wet stain on the wood for longer before you wipe away the excess - sometimes as long as 15 minutes. This may help you achieve a deeper color. Note: check the label directions for the particular stain you're using to see the maximum time you can wait before wiping off the excess stain.
Temperature and humidity
Low air temperatures and high relative humidity slow evaporation and increase the length of time your wood project will remain tacky. Before starting your wood project, make sure the temperature will remain above 65° F and the humidity around 50% during both application and the drying process.
Don't apply your deck stain in the direct sun; choose morning or evening hours, or a time of day when your deck has shade. Morning application can be a safer choice to help avoid any contact with dew that sets in overnight. Don't apply more stain than the wood can absorb.
Stain when the temperature is between 50 and 90 degrees Fahrenheit. Start staining early in the day. Stain dries quicker in higher temperatures in the midafternoon and parts of the project may dry faster than other areas resulting in a splotchy, uneven finish.
For example, painting at temperatures below 50°F can lead to surfaces drying improperly, sometimes with a cracking paint film. Cosmetically, painting in cold temperatures can also create issues with color uniformity and make touch-ups look far too obvious.
Key Takeaways: Rain can cause stain to become uneven, washed-out, or patchy if it occurs before drying. Allow at least 24-48 hours of drying time before rain exposure. Optimal staining conditions include temperatures between 50°F and 80°F and humidity levels of 40%-70%.
Too much cold can cause a delay in drying, and the stain might move when it shouldn't. This can cause such problems as the color not developing properly or the gloss looking uneven. Luckily, if you have to stain wood in cold weather, there are ways to mitigate any damages.
While it is possible, professionals advise against it. This is because staining wood in cold weather can adversely affect the staining process and make your wood worse. Water-based stains depend on evaporation to dry. The drying process allows the stain to adhere to the wood surface.
Without waiting for the wood to dry, stain and sealant would not penetrate the wood properly, diminishing its ability to protect the wood from weather damage.
If rain is forecasted, it's worth holding off treating your deck until you know it's going to be dry for a few days. Stains and oils penetrate wood best when it's cool and dry.
After you power wash, allow the wood to dry for at least 48 hours before you begin applying the new stain. This will allow the wood to dry completely and ensure the water doesn't affect the even application of your stain.
Before staining a fence with Wood Defender Fence Stain, we always recommend that the substrate is clean and dry with a moisture content of less than 13 percent. The surface must be free of dirt and other contaminants.
If you used a penetrating oil stain, you may have allowed the stain to build up too thick a coat on the surface of the wood. Penetrating wood stains are not intended to be a surface finish. If applied too thickly, they won't dry properly and will remain tacky to the touch.
– Beware of rain: Wait 2 to 3 days after a rain shower before starting your work and, if possible, make sure that no rain is forecast within 12 hours of completion. – Avoid dew: Wait until the wood is thoroughly dry after the morning or evening dew before applying the stain.
Do not apply below 55°F. CLEAR FINISH PROTECTION: Allow stain to dry a minimum of 3 hours before applying a clear protective finish. For a durable, crystal clear, ultra- fast drying finish we recommend Minwax® Polycrylic® Protective Finish.