Installing Roof Shingles

Valleys can either be open or closed – open valleys are not covered with shingles, closed valleys are. If your roof will have open valleys, which IKO recommends, now is when the valleys should be lined with a pre-formed width of corrosion-resistant metal. For longer roof performance, IKO strongly recommends open metal valleys. Complete the application of underlayment and valley flashing before the roofing shingles are applied. The recommended flashing material is a 28-gauge galvanized metal or an equivalent corrosion resistant, non-staining material .

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