How much do shingles weigh?
Per bundle and per square
Most architectural shingles come three bundles to a square, so multiplying the bundle weight by three gives a rough per-square figure. Designer shingles often take more bundles per square and weigh more. Older shingles being torn off weigh somewhat less than new ones because they have lost granules and oils.
Why weight matters
- Tear-off and disposal. A typical one-layer roof produces several tons of debris, which sets dumpster size and disposal cost. Two layers roughly double it.
- Layers. The residential code does not allow a new roof over two or more existing layers, partly because of the added weight and the hidden condition underneath.
- Rooftop loading. Crews spread bundles along the ridge or over walls rather than stacking them in one spot.
- DIY carrying. Hauling 60 to 80 pound bundles up a ladder is a real fall risk; most suppliers can deliver to the roof.
How shingles compare with other materials
Metal panels weigh a fraction as much as asphalt shingles. Concrete and clay tile weigh several times more, which is why switching to tile often requires checking the framing. Moving from asphalt to another asphalt line rarely raises structural concerns on a sound roof.
Signs of structural trouble
A sagging ridge, dips between rafters, or cracked rafters in the attic call for a closer look before adding weight. See architectural vs 3-tab shingles and roofing over existing shingles.