The following table provides typical weights for various roofing materials. Where possible, the values were taken directly from manufacturer technical data sheets and are the actual weights of specific, representative products. In a few cases, the weights we give were calculated using more general manufacturer data, or taken from a non-manufacturer source that we consider reasonably authoritative. In all cases, these values are meant to provide a general idea of what the various roofing materials weigh, and should not be used if precise values are needed for critical engineering calculations. When precision is necessary, always refer to the data sheets of the actual, specific product you intend to use, or contact the technical department of the product manufacturer or material provider.

Note that roof systems typically include more than one type of material. A built-up roof, for example, will typically include the built-up membrane itself, with or without gravel, as well as some kind of insulation and cover board, which will vary in thickness from roof to roof. When it comes to estimating the weight of an existing roof, field verification of the in-place construction is necessary.

Don’t forget to include all roof system materials when calculating roof weight.

Manufacturer technical data sheets (with the material weights) are almost always made available on the manufacturer’s website. For links to a huge selection of roofing manufacturers, organized by roofing material or product type, see Roof Online’s Roofing Manufacturers page.

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