Makes replacing composition shingles easier and accurate; also helps prevent damage to existing shingles; helps you align roofing nails with the proper 1" offset from the bottom edge of your existing course; lets you install new shingles without over bending or striking surrounding shingles or fingers with hammer.
Makes replacing composition shingles easier and accurate; also helps prevent damage to existing shingles; helps you align roofing nails with the proper 1" offset from the bottom edge of your existing course; lets you install new shingles without over bending or striking surrounding shingles or fingers with hammer.