Crankshaft Company manufactures equipment. Crankshaft s products range from simple automated machinery to complex systems containing numerous components. Unit selling prices range from $224,000 to $1,680,000 and are quoted inclusive of installation.
Roofing felt requires a minimum overlap of 4 inches between seams of felt and an overlap of 6 inches at roof valleys, peaks and intersections with flashing and fascia. Roofing felt must be attached to the decking with plasticap nails to resist wind damage.
15 lb felt paper is slightly better than the 30 lb., for underlayment. If the felt paper was going to be exposed to any wear and tear there could be a benefit in using 30 lb felt instead of 15 lb felt.But the felt paper never wears out.The felt is completely protected from wear and tear.he reality is that air needs to pass through the felt paper and so the 30 lb felt makes that slightly more difficult. If the 15 lb felt paper and the 30 lb felt paper were the exact same price, I would choose the 15 lb felt paper for my house.