Simply put, all shingles have sawmill and perfection textures and all shakes have rough-split texture. CertainTeed Siding shingles are: Cedar Impressions® Individual 5" Sawmill Shingles, Triple 5" Sawmill Shingles, Triple 5" Straight Edge Perfection Shingles, Double 7" Straight Edge Perfection Shingles, Double 7" Staggered Perfection Shingles, Single 7" Perfection Shingles. CertainTeed Siding shakes are: Cedar Impressions® Double 7" Straight Edge Rough-Split Shakes and Double 9" Staggered Rough-Split Shakes, and Northwoods® Single 7" Straight Edge Rough-Split Shakes and Single 9" Staggered Rough-Split Shakes.