Katepal Eaves and Ridge Green shingle is used under the first layer of shingles at the eaves and as ridge shingles at the roof ridge. Each sheet can be torn along the perforations to make three ridge shingles. The product should be attached to the substrate with roofing nails or flat-headed screws, roofing nails must penetrate through the substrate. Instructions can be found on the product’s plastic packaging and in the installation guide. The minimum installation temperature is +5°C.