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canadaclub 07-01-2010 11:15 AM

roof waste weight
Well I have to do my roof next week. I was up earlier measuring and discovered there are three layers (ashphalt) shingles. Needless to say, I will hire a couple of strong kids to do the removal but does anyone know what the approximate weight of the debris would be...I have to rent a dumpster. Roof sq ft is 1800


Scuba_Dave 07-01-2010 11:46 AM

3 tab shingles weigh about 80 lbs per bundle, 3 bundles to a square - 10x10'
So approx 240 lbs per 100 sq ft of roof - 1 layer
So calculate the roof area, then figure out weight per layer
With felt, nails etc the weight will be a little more

Here there is a standard charge for the size dumpster which includes "x" weight
Any weight over the allowed is then an extra charge

canadaclub 07-01-2010 11:51 AM

Thanks a bunch Dave:thumbsup:

racebum 07-01-2010 01:29 PM

i just ripped two layers of a 22 square roof and paid for 8.1 tons. i also had at least one ton of other debris in there. i'd say somewhere around 3 tons per layer is a ballpark. nails, felt, moss, moisture, it's all in there. what the shingles actually are has an impact of course but if you budget 9 tons if it comes in less you're good. the only other question i ask is have you considered what kind of condition the deck is in? what you see in the attic and what's there when you rip off can be a bit different.

RidgelineRoof 07-01-2010 02:31 PM

Is three layers acceptable code in California? I ask because that is against code here in North Carolina. We can put two layers on a house... and we do sometimes. Once a homeowner has two layers already we are required to rip both off before putting a new one on.

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