If you are going to put a new roof on your house I recommend that you hire a company to complete the tear off and disposal. I re-roofed my house last fall, I saved about $4,000.00 US overall. For the tear off and disposal, I spent nearly $900.00 (dumpster rental, dump fees and laborers) and it took me almost two full days. I had two quotes for $1,100.00, and they would have had it done in four hours.
The best quote I got for the whole job was $6,300.00 and We spent a total of $2,400.00.