Heat exchange causes expansion and contraction.
Guides on installing architectural shingles can be found from many different resources. Some online resources for installing architectural shingles include Youtube and Owenscorning.
Specifically, No, shingles aren't needed. When laying Ice Guard, it should be installed over/or under the tar paper, and under where the shingles "will " be installed. You could wait for probably up to a month afterwords to install the shingles over top of the Ice Guard.
13 square. 1 square of shingles is 100sq feet.
Architectural dimension shingles will vary in price depending on style, thickness, durability, and production costs. Cheaper dimensional shingles currently (2008) run anywhere from $50/square to $175/square.
33 square feet
Roofing shingles. Standard grade 3 per square. Architectural 4 per square.
A square of asphalt shingles, installed according to mfg instructions, covers 100 sq. ft.
20 year = 4 to a square. 30 year = 3 to a square. Most 20 year are also 3 bundles per square
typically a square is three bundles (about 26 shingles per) but in some types of architectural shingles there are four bundles per square to make them easier to handle.
3 per square, standard grade, 4 per square architectural.
There is no known 100% effective way to prevent shingles. If you are of a certain age you can get a singles-prevention shot and it will help do it's best to keep it from happening.
Yes. 15lb felt.