You're not supposed to nail directly through a valley pan, doing to will subject the valley pan to seismic activity and uneven expansion and contraction of the two structures it bridges, causing eventual failure in the form of tears as a result of eventual deformation and creasing and subsequent work hardening of the metal where the most force is exerted upon it.
Over a year posted, over 100 years old and ONLY 64 views?? How much longer is this dinosaur company going to last? PS Was this the first time Christie Clark has been talking about an industry other than Natural Gas....?
