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.
Total Costs. Based on the prices listed above, a replacement roof with mid-grade materials can cost $10,000 and up. A 24 square roof with asphalt shingles and a single layer of tear-off can cost as little as $6,700, while the same roof with zinc or copper roofing can cost as much as $30,000.An example of a contractorâs roof estimate walk-through can be viewed here. layers: $120 â $170 per 100 square feet. Asphalt shingles fall at the lower end of the spectrum because they cost less to remove than wood shakes or tile. Roofing companies charge higher rates for roofs with high pitches, steep slopes of 25% or more, than for those with low pitches.