Galvanized typically, although stainless steel would be hard to beat.
First, mark the roof with chalk lines at intervals. You want to make sure that your plumb lines are straight. Lay your first shingle butted up against the outside of the roof and overlapping the starter strip. Nail it down, with one nail at each corner, just below the asphalt line. Lay the next shingle down, and nail it down. Continue to the end of the roof.
The only type of nail for shingles is a roofing nail. Other nails have too small of a head and will pull through. You can use staples in an air gun, but they tend to pull through also.
Refer to Fastest Shingle Roofer answer
The best way to shingle a peak with asphalt shingles is to stabilize boards along the peak for safety. Continue to shingle the asphalt shingles to the peak working from the bottom edges of the roof peak. Nail two nails on the lower portion on both sides to hold in place. Continue until finished.
shingle overlap when properly attached is best for valley water run-off
Most commonly, roofing nails - a nail with an over sized head and a relatively short shank.
A leaking roof can be a headache for many owners. In addition, a leaking roof can cause extensive water damage inside a home, potentially damaging the foundation. A shingle roof is simple to repair. Locate the damaged shingle on a rooftop, and pull back the shingles above it. Using a claw hammer, remove the nails holding in the damaged shingle. Check for any existing damage to the tar cover. If there is any damage, repair it with silicone or roofing tar. Place the new shingle under the existing roof shingles, and nail in place. Make sure no other shingles were dislodged.
We were looking at shingle samples for our new roof.
A shingle...
Yes, you can, but it's best to remove the old shingles first.
Depends on the type of roof and type of shingles used.
Shingles are a lot like floors. The patterns change every few years as well as the colors. When a shingle is installed on a roof it will definitely fade with time. It is best to save some shingle packages from the initial installation to replace any shingles for roof patching in the future. The sun and the heat from the surface of the roof bake a shingle. The oils will eventually bake out and the shingle becomes brittle. If you were to break a corner off a shingle and it is pliable it is still doing well. If it breaks easily than you will find little stones in your rain gutters showing its deterioration. This will than break apart in wind storms.