One of the most important exterior facets of your home is the roof. This is because the roof’s primary purpose is to keep the elements away from the interior of the building. However, the roof is also important to the structure of the building. The roof of your home normally consists of the joists and rafters that give it structure. Over these are a layer of decking material which is either plywood or OSB (Oriented Strand Board). Manufactured wood is generally preferred by the Roofing Contractor in Arlington Heights IL because of its strength. Next comes a roofing membrane which is usually roofing felt or tar-paper. The final layer is typically asphalt shingles, but other options are available.