TWO LAYERED ROOF BUT NOT NAILS

[CHARLIE VAN FLEET]

HEY ALL

ok this 1977 roof had two layers of asphalt shingles but when i got in attic--didn't see to many nails-and the ones there were maybe at best 1/4 inch thru sheathing and there weren't many--what did they glue these thing s down. what do you thinkk

cvf

[Rick Cantrell]

They may have used 7/8" nails. Those would not be long enough to go through all the shingles and the deck.

[John Kogel]

Granted the nails from the second layer are too short. This doesn't explain why the nails for the original layer are not visible. That is a mystery we can't solve from the armchair. ;)
The rule is for nails to pass completely thru the sheathing for max strength.

The second roof layer was a waste of money for two reasons - a new layer over an old leaky layer seldom lasts and the flashings are not replaced, so prone to leakage. Number two - not nailed down properly.

[Mike Kleisch]

Two layers of sheathing, maybe 3/8" originally and they added 1/2" to beef it up when they did the first layer of shingles???

[Stephen G]

I see nails....frosted white....

[CHARLIE VAN FLEET]

I see nails....frosted white....

you see nails frosted white-what does that mean--there are twolayers of shingles--come on stephen--thats lame

cvf

[Stephen G]

I see nails, and they are frosted white? Corrosion....are you not seeing them or am I missing something

[CHARLIE VAN FLEET]

I see nails, and they are frosted white? Corrosion....are you not seeing them or am I missing something

stephen--can't help you- the nails were not frosted enlarge the photo--there were five nails per sheaHting and two layers of shingles--what don't you get--TWO LAYERS--DOES THAT SEEM RIGHT TO YOU

CVF

[Stephen G]

Was only commenting that, yes, I see nails. So the first set were nailed to the bare min..won't know about the second layer without lifting.....some days it pays not type anything....

[CHARLIE VAN FLEET]

Was only commenting that, yes, I see nails. So the first set were nailed to the bare min..won't know about the second layer without lifting.....some days it pays not type anything....

YOU ARE RIGHT THERE

[Lon Henderson]

Use the Mike Holmes inspection method......Rip up the shingles, pull the nails, measure them and then demand that the house be re-roofed.......yeeehaww:hail:

Roof nails must penetrate the roof sheathing, so write it up, not that anyone will do anything about it now. But in windy Colorado, that roof has some vulnerability to wind damage.

[John Kogel]

I'm thinkin' they may have used staples for one of those layers. It wouldn't matter which if the wind hits it just right.

[Lon Henderson]

I'm thinkin' they may have used staples for one of those layers. It wouldn't matter which if the wind hits it just right.
I didn't think of staples. When I was roofing in Texas back in the late 70's we used staples. It was obvious to me then, that staples were little better than putting bubble gum under the shingles. Cold shingles were secure but you could pull a warm stapled shingle up with little more than a tug but the boss said do it and we did it.........and in Texas, warm shingles were common.

But even staples were required to penetrate the decking.