Deck and Fence Washing
Great Northwest Painting Inc.
Pressure Washing Service, Deck Restoration, Deck Washing
The forces of weathering can be devastating to wood. Moisture from rain, snow, and dew are quickly absorbed by unprotected wood, causing it to swell while washing out the natural resins and colorings. The heat from the sun dries and shrinks the wood. These daily cycles of wet and dry, swelling and shrinking causes the wood to warp, splinter, cup, crack, and become discolored while also allowing the sunlight (UV) rays to break down the cell structure and degrade the wood’s integrity. These factors combined to physically and chemically attack the wood’s lignin (the glue that holds the wood together). Moisture that is allowed to sit in the wood will soon serve as a natural food source for mold, mildew, algae, and fungi causing black, green, or gray discoloration. Being horizontal, deck surfaces hold water and snow for prolonged periods of time, accelerating the damage. The dampness attracts pollen and fungal spores, which collect and cause ugly discoloration. Decks are subject to 40-50 percent more direct sunlight than comparable vertical surfaces. This results in unique thermal stresses to the wood. For example, on a sunny summer day the temperature on a deck board can vary as much as 50 degrees between the sun-exposed surface and the damp, shaded underside. In addition to all this, decks are subject to foot traffic, physical wear and tear, and ground in dirt. If the wood is not properly cleaned and sealed with the right products, the wood will eventually begin to rot. The cost to replace wood is considerably higher than it is to have a professional maintain it correctly. Luckily, you have Great Northwest Painting Inc. to help you protect your investment.
, Deck Washing
, Pressure Washing Service