The point is, hot-dipped galvanized nails will do the job for 99% of the houses out there. I'd only specify stainless roofing nails if I lived at or close to the ocean. Hot-dipped galvanized nails can last well over 100 years in non-oceanic climates.he point is, hot-dipped galvanized nails will do the job for 99% of the houses out there. I'd only specify stainless roofing nails if I lived at or close to the ocean. Hot-dipped galvanized nails can last well over 100 years in non-oceanic climates.
Costs more to build out. As you said, there are all kinds of other factors, but the same square footage in two stories will cost less to build than in one. Most homes with traditional foundations can sustain a second floor addition without additional support.
Over the life of a building, operation and maintenance cost more than initial construction (figure 1). This is true both for new construction and for major replacement and improvement projects, so it makes sense to include operation and maintenance when evaluating cost effectiveness.ver the life of a building, operation and maintenance cost more than initial construction (figure 1). This is true both for new construction and for major replacement and improvement projects, so it makes sense to include operation and maintenance when evaluating cost effectiveness.