To avoid damaging the surface of wood and composite decks, use a pressure washer with a maximum of 1,300 PSI. For metal or decks made of extra hard surfaces, you can go up to 2,300 PSI. Staying within these limits helps remove stubborn dirt and stains without harming your deck.
Yes, it's a good idea to pressure wash your deck before staining it. A thorough cleaning by a pressure washing professional removes dirt, mildew, and old paint or stain, ensuring the new stain adheres properly and looks great. A clean deck also means the stain will last longer and better protect your deck.
Determining whether to use soap when pressure washing your deck depends on the extent of soiling. For lightly soiled decks, water alone may suffice; however, heavy dirt and oily residues demand a specialized, deck-safe detergent. Using the right soap enhances the cleaning process by breaking down stubborn grime while safeguarding the deck’s surface.
The optimal time to pressure wash your deck is in the spring or fall. In spring, cleaning eliminates winter mold and accumulated dirt, while in fall, it removes greasy spills before the cold sets in. Scheduling cleaning during these periods not only enhances your deck’s appearance but also preserves its integrity and reduces long-term maintenance costs.
If your deck was recently stained or sealed, you do not need to apply a new sealant immediately. However, if several years have passed since the last resealing, pressure washing effectively removes old sealant and prepares the surface for a fresh coat. Resealing protects against moisture intrusion and prolongs the deck’s lifespan, ensuring a durable and even finish.