learn how to install Cedar Shingles Top tips. • Spend some time selecting the best face of the shingles and then nail a double starter course, separating shingles approximately 6mm apart. • Use timber roofing battens such as JB Red and counter battens with a membrane to allow adequate air flow if necessary. • Use two 31mm x 1.8mm silicon bronze nails per shingle. Red Cedar Shingles CEDAR SHAKE & SHINGLE BUREAU THE RECOGNIZED AUTHORITY SINCE 1915 SUMAS, WASHINGTON (604) 820-7700 PREMIUM GRADE 100% Edge Grain (604) 820-7700 treatment company's recommended installation instructions. Certi-Last® Preservative-Treated Cedar Shakes and Shingles Premium and Number 1 Grades of Certi-Split® shakes, Certi Work from fascia to ridge while installing shingles to avoid walking directly on Cedar Breather (may be slippery, especially when wet). 4. Install cedar shingles per manufacturer's instructions. Utilize a nail length that will allow for 3/4" penetration into sheathing or completely through sheathing. Allow 1/4" for Cedar Breather thickness. Basic Installation. View / Print. Complete Instructions. > For each new course, position the first Shingle-Strip anywhere in the course. > Align the left edge of the first Shingle-Strip in each course with the Edge Guide in the previous course (12" offset). > Continue installing Shingle-Strips to the left and right, working toward the corners.