Cutting and Correctly Nailing Shingles

What happens here

Begin installing the asphalt shingles. For the first course, overlap a shingle and use its edge as a guide to cut the lower edge of the shingle being installed, ensuring a straight and clean line. The builder demonstrates that nailing shingles too high or overdriving nails causes them to not hold well. He then shows the correct method of nailing, ensuring the shingles are securely fastened for maximum weather resistance.

Goal: Install shingles with proper cutting and nailing for durability.