Wind Mitigation - staples in new roof dimensional lumber

Specific Inspection Topics Ancillary Inspection Services
1

I’ve got a question for you smart folks… Sorry if this has been addressed elsewhere already, I’ve been looking through the posts for a bit now with no luck.

Do staples qualify for question #3 Roof Deck Attachment option C on the Florida Uniform Mitigation Verification Inspection Form OIR-B1-1802 (Rev. 01/12) Adopted by Rule 69O-170.0155?

As I understand it they do not. It seems to me that anything but an 8d nails (smooth/screw/ring shank) lands on option A, but I have recently been informed by a very experienced & knowledgeable inspector (that I respect very much) that I was incorrect. He stated the staples still qualify in dimensional lumber because of the superior strength/friction(??) of the dimensional lumber over OSB or plywood. So under the “-OR - Any system of…” line.

But I have found nothing to prove that a min of 2 staples per board provides the same uplift resistance as the 8d nails. But I have found staples installed on many newer roofs (the one I inspected yesterday was reroofed with county permit/inspection in 2007) with dimensional lumber which along with his new comment, has me questioning my thought processes.

Thanks in advance for your assistance :smiley:

2

info here

3

Thanks for the great link Roy! There is a lot of good info there. I am quite aware of the issue with using staples for the install of the shingles themselves (that’s been banded for some time here in FL) but I was looking specifically on the uplift strength of 2" staples used to secure the roof deck to the trusses.

Any info on that?

4

Your mentor is incorrect. Dimensional lumber with medium crowned staples gets either A or Other, unless you have difinitive engineering that allows B or C on the 1802 form.

5

Thank you Brad. I didn’t want to get folks denied for a credit they could otherwise receive due to a lack of knowledge.

6

Anytime. You should post wind mitigation questions in the Florida section.

7

The form states, “nails”.