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PaulPeterson · 09-07-2012, 03:11 AM

Quote:

Originally Posted by D725A

We hope to have a new architectural roof put up on a 1924 colonial with 1x7 tongue and groove decking. Most of the wood has held up very well for the 88 years, a few cracked pieces we can replace with extra same-size pieces from the attic floor.

Opinions from roofers vary; obviously there will have to nails coming through the decking between the roof joists. The question is where to avoid having the nails come through. Obviously hitting it through the edges where the tongue and groove is is not a great place. And if it's dead center of the decking section between the rafters there's risk of splitting the wood. One roofer told me since they know the width of each piece and the location of the joists below they can mark out some kind of template for the underlayment and shingles so they'll always know about where they are.

Does this sound right? Perhaps with the new nail guns there's less hammering overall and less stress on the wood?

If you are using a nail gun then it will have less to zero chance of nails coming through...

joecaption · 09-08-2012, 11:36 AM

Not likly in real life any roofer is going to come up with some template to avoid the joints.
If your that concerd with it just go over the whole roof with 1/2 CDX plywood or OSB. It's done that way all the time.

D725A · 09-08-2012, 12:27 PM

Just to resolve this thread, the roof has now been completed. While there were some other issues I won't go into here, the nailing seemed to work out well. They used 1.25" nails with nail gun; some of the old planks have knot-holes and cracks, but overall looks sturdy. We had the option of half-inch CDX plywood but felt the old boards would work out fine.