For wood garage doors, moisture is the biggest threat. It can enter the wood and lead to rotting or warping. According to Miami, Florida garage door contractors, not only does this occur when it rains, but humidity and temperature changes can also affect the integrity of wood.
To protect against moisture damage, you’ll want a garage door contractor to apply a weather-resistant finish to your door. There are two basic kinds of finishes: film finishes and penetrating finishes. Film finishes, like paint or varnish, can crack under stress easier; while penetrating finishes, like stains and oil, are more flexible. Therefore, a penetrating finish is recommended for garage doors.
It’s important to protect the garage door from within as well. Because the door moves, moisture can seep in from the back and cause damage there. However, since it does not get direct exposure to the elements, it does not need to be maintained as frequently.
Aside from applying finishes, there are many protective coatings available as well, made specifically to protect garage doors against fading, corrosion, oxidation and rust. They are applied like paint but are clear, so the paint beneath still shows. Discuss your coating options with a professional garage door expert, as there are different coatings for different types of garage doors.