Preservation is essential when it comes to shielding the interior from leaks and damage.
Wood's surface starts to change as it is exposed to the influences of sunshine and precipitation. Weathering, a collective term for this change that is both physical and chemical, is used to describe it. The color is the first obvious modification. A graying process starts as the original reddish-brown hue proceeds to fade. As a result of the sun's UV radiation removing specific cell-wall components from the surface layer (less than 0.01 inch thick), the color has changed to a silvery gray.
Wood naturally draws water to its surface quickly. The wood expands as a result. It shrinks as it dries and its moisture content drops. Continual wet to dry cycling develops compression and tension strains, which in turn lead to the emergence of small cracks.
There are two ways to clean the wood roof before treatment, depending on its condition: chemical cleaners (bleaching), and power washing. These chlorine solutions efficiently eliminate surface algae and mildews as well as the oxidized wood fibers on the shingle surface. The dingy gray tint of the roof is changed to a "buff" or buckskin tan hue.
Because some forms of lichen, moss, and algae are not harmed by chlorine solutions. Using a high-pressure washer similar to those used to clean cars, they must be manually removed. Power washing is frequently utilized and works pretty well on wood roofs. The top layer of wood fibers on the shingles are essentially removed by power washing, in a manner similar to how sandblasters remove rust from metal.
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