Complex sentence: Both shakes and shingles must be edge grain cut, to prevent warping and splitting as the wood dries, so when splitting blocks and manufacturing shakes or shingles particular care must be taken to consider the orientation of the grain in the wood.
Split into simpler sentences: Both shakes and shingles must be edge grain cut, to prevent warping and splitting as the wood dries. When splitting blocks and manufacturing shakes or shingles particular care must be taken to consider the orientation of the grain in the wood.