Performs several functions, the most notable being end-to-end packet delivery, reliability, and flow control. There are TWO protocols in the Transport Layer: TCP and UDP.
In another case, the roofing and pavement consulting firm Benchmark presented a cost range from retail roofing projects it has examined. Benchmark reported on a majority of retail roofing projects it has looked at, roof replacement costs generally range from $3.50 to $6.50 per square foot.However, the cost depends on whether a project was aiming for roof recovery or consisted of a complete tear-off and replacement job.his post builds on one of earlier posts about commercial roof maintenance costs. How much does a commercial roof replacement cost? One study reports on a roof with average dimensions of 10,000 square feet, a new commercial roof can cost over $42,500, or over $4.25 per square foot.
1 With average roof dimensions of 10,000 square feet, a new commercial roof on average costs $42,500+. 2  Generally speaking, roof maintenance programs cost 1-3 percent per year of what a complete roof replacement is projected to cost.3  Over 80 percent of all roofs are replaced before they need be so.n a 10,000-square foot roof, those cost differences are quite wide-ranging. A reactively maintenanced 10,000-square foot roof would cost on average $2,500, and an actively maintenanced 10,000-square foot roof on average $1,400. That is a $900 cost difference overall.