comp roof install

Specific Inspection Topics Exterior Inspections
1

Hi Guys

I have always known that to install comp on roof you need to install
over solid wood . I saw a home with comp put over roof paper and spacers now is this not incorrect? You cant walk on this your foot will go through . is this something new?

Thanks
Tony

2

How did you view this? If you were looking from the attic, you may have seen the old skip sheathing for a shake roof with the old tar paper still in place. They may have put new plywood or osb sheathing over the top of that. Any pics?

3

You ought to email Kenton Shepard; he’s become our in-house roof expert.
Kenton@nachi.tv

4

Send pics, too.

5

It’s a defective installation, Tony. Manuifacturer’s requirements are typically 1/8" to 1/4" gap maximum in the roof sheathing.

6

Thanks Kenton and guys for response help.I did not inspect this house
this was in my neighborhood and i was just an observer. definitly spacers
are about 2 inches or more apart .it was a roof shake being removed and
also the felt paper . Same design as my house
same year and i have spacers under shake so i didnt see them take
the spacers out or install solid over new paper ,they went over the old spacers
it all happen in 2 days so quick to quick. anyway , i was just inquiring because i know what i saw.
No pictures sorry, thanks for your help.
Tony

7

Two days isn’t long. Had 2 guys remove my shake roof, install new sheathing, paper and a new aluminum shingle roof. 2 1/2 days including clean-up. Doesn’t take long to install new sheathing.

8

If it had a shake roof installed, it’s definitely better than just comp shingles over spaced sheathing. The shakes form a substrate that will at least allow you to walk the roof.