A single bundle of Owens Corning TruDefinition Duration architectural shingles typically costs between $90 and $130 for materials alone when purchased through retail home improvement supply centers or wholesale distributors. Because standard roofing estimates are calculated per square (where one square equals 100 square feet of roof coverage and requires three bundles), material expenses average roughly $3.00 to $4.00 per square foot. When factoring in professional contractor labor, tear-off of old layers, and disposal fees, the total installed cost ranges from $550 to $800 per square.
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