Manufacture of Shakes and Shingles From Block Form
Shake blocks are split into 1 inch thick slats called blanks, using either a hydraulic press with a blade attached, called a cuber, or split by hand using a froe and mallet. These blanks are uniform in thickness throughout if split from the same edge without flipping the block. Alternatively, the splitter may flip the block after a blank is taken off each edge, which results in a tapered split from end to end, called tapers or hand-split. The blanks which are not tapered require further processing before application to create this taper, and are run through a large band saw, pushed by hand to cut them from corner to corner forming a tapered shake, sawn on one face.
Shingles are cut from the blocks using a circular saw, typically 42-48 inches in diameter. The blocks are clamped in a carriage which slides back and forth across the blade, tilting and moving the block closer to the blade with each pass to automatically form a tapered cut of the correct thickness. The edges of the shingle are then cut with another circular saw called a "trim saw", to remove irregular edges. The result is a tapered shingle sawn on all six sides. The thickness of the butt, or thicker end of the tapered cut, is usually 3/8 inch thick, but is also commonly made to be 5/8 inch, and can be made to any custom specifications.
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