although it may not be code in certain areas, you are more safer using 30# felt on steep roof because it tears less easy making it safer for the roofer.
It Depend's On How Big You Want It. I Know At Walmart They Cost $25 to $30. But At Staples The Will Cost MORE!
That depends. If this is a shingle or "steep slope" roof system, one layer of felt lapped 4" would be sufficient. A typical roll of #30 felt covers 200 sf.
30# felt is thicker..... Better?
About 30 minutes.
I want 30 housekeepers
It is 3.6 miles.
30% of 6.49 30/100 x 649/100 19470/10000 1.947 Hence the required answer is 1.947
15 lb. 400 sq. ft. 30 lb. 200 sq. ft.
type I is 15# felt and type II is 30# felt
As much as you like except that the force required increases as the angle increases.
In the US, formal registration fees vary from $30 to $220 depending on the services required; however, registration is not required for protection.