Unlike Amazon Prime, Amazon Business will be free to verified business customers, offering features such as bulk pricing, free two-day shipping on orders worth more than $49, and access to products not available to typical retail consumers.
Roof shingles are sold by both the bundle and by the square. A square of shingles is the quantity needed to cover 100 sq. ft. of roof. Shingles are packaged in paper- or plastic-wrapped bundles designed to be light enough for a person to carry, so heavier shingles require more bundles per square.
A square of shingles weighs 250 lbs. to 400 lbs. depending upon the type of shingle (see below). An important thing to keep in mind is that many roofs have multiple layers of shingles, so you must factor that in when determining weight and choosing a dumpster. For example, a 20 square roof with two layers of shingles will actually produce shingle waste equal to 40 squares. Know how many layers of existing shingles are on your roof prior to ordering the dumpster to ensure you choose the right one and avoid having to get a second dumpster later.