Timeline for Should roofing nails be visible in the attic?
Current License: CC BY-SA 4.0
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| Jan 15, 2021 at 3:00 | history | edited | Niall C.♦ | CC BY-SA 4.0 |
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| Jan 14, 2021 at 12:27 | comment | added | FreeMan | Also, note that the vertically grouped nails sticking through ~2" on either side of the OSB joint are framing nails that are holding the OSB down to the original skip-sheathing and were, I'm sure, applied before the shingles/felt went down. The horizontally aligned nails, on either side of the framing nails are the roofing nails and they appear to extend about 1/4" through the OSB/skip sheathing combo and look to be just about right to me. | |
| Jan 13, 2021 at 19:21 | comment | added | Nate S. | This just isn't correct. Shorter nails would still provide a water channel into the wood itself, instead of just through it -- but the nails shouldn't be getting hit with much water anyway based on the way the shingles are laid on top of them. And having nails go all the way through is common and I've never heard of it causing mold unless there was also something else wrong. | |
| Jan 13, 2021 at 19:19 | comment | added | FreeMan | Also, please edit your new answer into this existing one. While writing up 2 answers is acceptable here, these two really need to be combined. | |
| Jan 13, 2021 at 19:16 | comment | added | FreeMan | Now, I'd agree with you 100% on not using particle board on a roof. It's not very strong at all and would not support someone walking on it or a branch falling on it at all. If, however, you mean OSB, I'll agree with you somewhat. I did use OSB on my roof, and now kinda wish I hadn't, since I've had branches puncture it when they've fallen off our trees. Plywood would be more resistant to the damage. However, the OSB makes the damage much more readily apparent leading to a faster repair - I might not notice shingle only damage until much later... | |
| Jan 13, 2021 at 19:14 | comment | added | FreeMan | You say, "1" roof decking should be a minimum standard" - is that your opinion or is that in the IBC somewhere? Also, yes, I put a roof on my garage nearly 30 years ago, I live in the very rainy mid-west US, and no, I've never had a bit of mold growing on the underside of the roof, so I'm quite comfortable with the arrangement. Again, I ask for code references for your assertions, not opinions. That is the way here at the StackExchange sites. If you'd care to take the tour, you'll see what's expected of in an answer here. | |
| Jan 13, 2021 at 19:12 | review | Late answers | |||
| Jan 13, 2021 at 19:36 | |||||
| Jan 13, 2021 at 19:10 | history | edited | Thalen Kane | CC BY-SA 4.0 |
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| Jan 13, 2021 at 19:09 | comment | added | Thalen Kane | Mold contributes to over 400,000 respiratory illness deaths / year. I would like to know if you would risk the lives of your family on a cheap roof that could be done right. I don't see the lives of my family as trivial and the 1" roof decking should be a minimum standard to protect families. There is nothing that can completely remove mold from wood once it is infected. As far as supporting weight, the roof must support the weight of the roof and a calculated amount of snow, rain and wind force. If it won't hold 1" plywood, it probably won't meet the other standards either. | |
| Jan 13, 2021 at 19:04 | comment | added | FreeMan | While a 1" plywood roof sheathing would be nice (if the roof is built to support it), I'd like to see a code reference that requires it as you imply. I would agree that the nails in the OP's post do not look like they are properly galvanized roofing nails, nailing through the sheathing is pretty common. Also, got a reference for "burn it down" once you've got some mold in the roof? That seems pretty dog-gone extreme, considering there are a number of common household chemicals that will easily & safely kill mold... | |
| Jan 13, 2021 at 18:57 | review | First posts | |||
| Jan 13, 2021 at 19:04 | |||||
| Jan 13, 2021 at 18:54 | history | answered | Thalen Kane | CC BY-SA 4.0 |