What are wood shakes and wood shingles?
Wood shakes and shingles are trees that have been sawn into sections and the are split into pie shaped sections. They are then resawn into shakes or wood shingles. Wood shakes and Shingles are different in their shapes and size. The typical wood shake is taper sawn and the butt end of the shake is approximately ¾’ thick. Wood Shingles are cut evenly from end to end and have no taper to their appearance.
Normal Wear and Tear to a Wood Shake Roof:
Cupping occurs because of the shingles exposure to various weather conditions and the shingles variations in moisture content. The top surface of the shingle dries out a higher rate of speed as opposed to the bottom of the shingle which results in the natural occurrence.
Curling is a distortion of the shingle and occurs because of a variation in moisture conditions the shingle has been subjected to over time.
Splitting normally begins at the butt of the shingle and run the length of the shingle. The inside of the shingle becomes weathered and grey, and the edges of the split will become rounded.
This type of shingle damage occurs when the exposed edge of the shingle retains an excessive amount of water due to poor drainage, tree coverage, mold, or high humidity.
Buttrot is clearly identified by when the edge of the shingle has become soft and beginning the stages of decomposition. Generally, the remaining portion of the shingle remains intact and continues shed water efficiently.
Hail damage to this leading edge of the shingle can be intensified and because of the moisture content of the shingle there is not a corresponding split in the overall affected area.
Damage due to splitting is another form of normal wear and tear to a wood shingle. Splitting is clearly identified when the split forms a “V” Shape in the section that has split. These splits normally begin at the butt end of the shingle and work their way up as a normal progression of weathering.
Weathering is the natural progression in the life cycle of a wood roof. As it ages and is exposed to the elements it becomes thin and begins to become brittle. A severely weathered wood roof could appear to have wind damage at first glance, but the roof must be evaluated in its entirety to properly assess the damaged.
This type of damage is most likely a factor defect in the shingle and is not considered damage from wind or hail.
Hail Damage Identification:
This type of damage is considered cosmetic in nature as the impact of the hail has only cleaned away any oxidation or organisms on the roof. Spatter marks are common with smaller hail and while it is an indication that there was hail to the surface since there were no resulting splits near or at the impact marks this is not considered to be damage to the roofing surface.
When evaluating hail damage to a wood roof it is best to chalk a 10×10 area to narrow down your area of concentration. Hail damage to the surface will is considered when hail makes impact with the surface resulting in a fresh split that occurs near or at the impact location. A fresh split in the wood shingle is clearly identified by the exposure of the orange colored wood on the inside of the split.
Wind damage is identified by looking at the patterns in which the shingles have been torn from the roofing surface exposing the felt or spaced decking beneath. In most cases wind damage will start at the ridge or side of the house where the shingles are more exposed to the high winds.