1 For a 2,000 square foot new roof the cost will be approximately $2500-$3000. 2  A low bid might be closer to $2000, a high bid around $5000-$6000 or more. 3  A bundle of shingles costs $20-$25. A low bid might be closer to $2000, a high bid around $5000-$6000 or more. 2  A bundle of shingles costs $20-$25. 3  Shingles, labor and disposal of the old shingles. 4  The general procedure for installing a new roof is to strip one side of the roof, replace those shingles, and then repeat for the other side.
Excavation and trenching are among the most hazardous construction operations. OSHA defines an excavation as any man-made cut, cavity, trench, or depression in the earths surface formed by earth removal. A trench is defined as a narrow underground excavation that is deeper than it is wide, and is no wider than 15 feet (4.5 meters). Dangers of Trenching and Excavation. Cave-ins pose the greatest risk and are much more likely than other excavationrelated accidents to result in worker fatalities.
Planning and Logistics. The excavation of a site is a tremendous endeavor and the obligations to publish the results encourage careful forethought about the direction the project should head and the particular issues to be addressed. Basic logistical questions have to be considered.