No nails

[Buck Hartley, CMI]

On today's inspection as I entered the attic I hit my head on the sheathing, no puncture wounds. There are NO nails protruding through the sheathing. How big of defective is that?

[iniquette]

Was it 1x? planking that you saw. May have been an osb reroof. then they went and used short nails? Have seen that a few times. Other than that, you got me.

[John Allingham]

Nails don't always have to go right through:

9.26.2.2. Nails
(1)

Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, “Wire Nails,
Spikes and Staples”.

(2)

Nails shall have sufficient length to penetrate through or 12 mm into roof sheathing.

(3)

Nails used with asphalt roofing shall have a head diameter of not less than 9.5 mm and a shank thickness of not less
than 2.95 mm.

(4)

Nails used with wood shingles or shakes shall have a head diameter of not less than 4.8 mm and a shank thickness of

not less than 2.0 mm and shall be stainless steel, aluminum or hot-dipped galvanized.

[Kenton H. Shepard, CMI]

Originally Posted by jallingham

Nails don't always have to go right through:

9.26.2.2. Nails

(1)

Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, “Wire Nails,

Spikes and Staples”.

(2)

Nails shall have sufficient length to penetrate through or 12 mm into roof sheathing.

(3)

Nails used with asphalt roofing shall have a head diameter of not less than 9.5 mm and a shank thickness of not less

than 2.95 mm.

(4)

Nails used with wood shingles or shakes shall have a head diameter of not less than 4.8 mm and a shank thickness of
not less than 2.0 mm and shall be stainless steel, aluminum or hot-dipped galvanized.

For those in the US that's a minimum of 3/4" penetration or just through the panel for 1/2" panels like plywood and OSB.

If the sheathing were thicker than 3/4", that might be an acceptable reason to not see nails. I'd suspect shortnailing right off the bat, and try to confirm the condition.