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.
In general, if you have the land, it is more cost effective to build a room addition onto the side of your home than to build a second story addition on top of it.With any home addition, it is a major construction project. As a matter of fact, it really is like building a small new home.n general, if you have the land, it is more cost effective to build a room addition onto the side of your home than to build a second story addition on top of it.