Changing temperatures, moisture and sunlight can cause a deck to crack, warp and become discolored.
Sealing your deck every one to three years can protect it from weather damage.
You can use a clear sealer or a stain that contains sealer.
A clear sealer will protect your deck from moisture and maintain its natural color, but it won’t provide much UV protection.
A semi-transparent stain will provide moderate moisture and sun protection.
A solid stain will completely cover the wood’s grain.
Oil-based sealer penetrates deep into wood, but water-based sealer is easier to clean.
Read the sealer manufacturer’s instructions and check the weather forecast before cleaning and sealing your deck.