If you re not sure how many bundles of shingles are on your roof you can also estimate shingle weight by the square.
How many tons does a roof weigh.
Metal roof systems in most cases weigh between 1 to 3 pounds per square foot.
Recommended dumpster sizes for asphalt roofing shingles.
Flat roofs may be especially vulnerable to roof collapse depending on its engineered design load.
These are the weights of typical actual products.
Three tab asphalt shingles weigh 50 80 pounds per bundle.
30 squares or 3000 sq feet.
Moisture transport through building walls and roofs moisture will flow through a wall or roof if the vapor partial pressure is higher on one of the sides rainfall draining of roof areas and vertical downspouts capacity of vertical downspouts when draining roof areas in rainfall.
Snow won t slide off.
With metal roofing weight on a structure is never an issue.
Asphalt shingles 3 tab or strip 1 95 lbs.
Slate roof shingles weigh much more sometimes over 300 pounds per bundle.
And in cases where metal may be installed over an existing roof it may be the only practical answer because other materials may add too much weight load for the existing roof to bear.
Two feet of snow on a roof with a footprint of say 28 40 feet could weigh 45 000 pounds.
Ft kilograms per square meter kg m 2 source.
Architectural asphalt shingles weigh 65 80 pounds per bundle.
Dumpster size rating potential weight tons 10 yard dumpster.
45 squares or 4500 sq feet.
That s more than 22 tons.
Pounds per square foot lb ft 2 pounds per square 100 sq.
The weights of other actual products of the same type may vary.