Western red cedar shingle installation on this expansive Killingworth residence. We specified certi-sawn perfection cedar shingles for their smooth, more uniform look. The shingles were treated with chromated copper arsenate (CCA) to serve as a preservative and organic pesticide. All penetration and valley flashing is 16 oz red copper. We ran full ice and water membrane as an underlayment and added a layer of cedar breather underlayment to provide airflow and drying under the shingles.