How long should nails be?
Hired a roofing company last week. There almost done with job. There going to nail down some 1 inch poly-iso roofing insulation. To adjust the pitch a little on the low slope roof. But the nails they will use are 3" why so big. Do the nails really have to be 3" long. The deck is only 3/4 ÃƒÂ¢Ã¢â€šÂ¬Ã…â€œ thick the insulation is only 1" and the cap sheet with the base is less than 1/8" . Which is torched down. That is a total of 1 7/8 inch.
That leaves 1 1/8 inch nail penetration through the deck. Is this right? Should nails penetrate the deck at all on a low slope roof.
Thanks. I just need to know before they start nailing this stuff down. If It should be different I will let the roofers know and have them make the changes if needed.
Thanks everyone for the help. Roofing…com is the best. I saved a little over $ 3000.00 on a tear off. Did it my self and had a roll off dump to help with the waist.