Rain and snow can damage the deck's surface. The intense heat of the sun can cause discoloration and brittleness. Before constructing your deck, make sure that your materials especially the timber is well treated. It is important to protect the surface of the deck with a coat of sealer. This will protect it from the harsh environmental elements and also from mildew and dirt. Another added advantage is it will also extend its life span.
Since there are many wood sealers available, choose one which can fend off UV rays and one that can protect the timber from water. Good ones can lock in the shine and brightness of your floor.
Before you apply your sealer you have to sand it off first for a smooth and even surface. Next step is to sweep all the dirt off then look for discolorations and mildew. You can remove these by using mild bleach. If you see any area that needs repair, attend to it before it gets worse. Once this is fixed, you can now stain the deck. Afterwards, you can put in the sealer using a paint roller or paint brush.