veitenm Posted May 11, 2008 Report Share Posted May 11, 2008 Inspected a 1985 home today with flaky OSB roof sheathing under the eaves. The sheathing has been painted/stained, but the flaking is the OSB itself, not the paint/stain. Roof covering is new and the OSB looks good in the attic. Any ideas how to call this? Quote Link to comment Share on other sites More sharing options...
hausdok Posted May 11, 2008 Report Share Posted May 11, 2008 Hi, Sure, it's rotting. Betcha there wasn't any drip edge at the perimeter of the roof either, just like 99.9% of the other roofs around here. I find about 1 out of every homes without drip edging at the eaves has some rot around the perimeter of the roof. Call it. They'll have to strip it back to the wall line, replace the rotting decking, this time using drip edging, and reshingle the roof. Then they'll have an ugly light-colored band at the perimeter of the roof. 1985 home though. Is it the original cover? If so, strip the whole thing. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
veitenm Posted May 11, 2008 Author Report Share Posted May 11, 2008 Originally posted by hausdok Hi, Sure, it's rotting. Betcha there wasn't any drip edge at the perimeter of the roof either, just like 99.9% of the other roofs around here. I find about 1 out of every homes without drip edging at the eaves has some rot around the perimeter of the roof. Call it. They'll have to strip it back to the wall line, replace the rotting decking, this time using drip edging, and reshingle the roof. Then they'll have an ugly light-colored band at the perimeter of the roof. 1985 home though. Is it the original cover? If so, strip the whole thing. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
veitenm Posted May 11, 2008 Author Report Share Posted May 11, 2008 Probed the sheathing, but nothing appears to be rotten -- just surface flaking of the OSB on the underside of the eaves and the flaking appears superficial. Edges looked good. Current asphalt composition shingle covering is new. Could the flaking be the result of moisture intrusion that occurred before the new covering was installed? Or is the flaking characteristic of early generation OSB? And is replacement of the sheathing really necessary? (OSB looks structurally sound.) Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted May 11, 2008 Report Share Posted May 11, 2008 Originally posted by veitenm Probed the sheathing, but nothing appears to be rotten -- just surface flaking of the OSB on the underside of the eaves and the flaking appears superficial. Edges looked good. Current asphalt composition shingle covering is new. Could the flaking be the result of moisture intrusion that occurred before the new covering was installed? Or is the flaking characteristic of early generation OSB? And is replacement of the sheathing really necessary? (OSB looks structurally sound.) Every time I've seen painted OSB exposed at the eaves, it looks like it's flaking. I think that's just a characteristic of the product. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
hausdok Posted May 11, 2008 Report Share Posted May 11, 2008 Originally posted by veitenm Current asphalt composition shingle covering is new. Could the flaking be the result of moisture intrusion that occurred before the new covering was installed? Or is the flaking characteristic of early generation OSB? Well, I don't think 1985 is early generation. I seem to recall reading a comparison between plywood and OSB about 8-9 years ago that said that it had been in use (at that time) about three decades. Every time I've seen painted OSB exposed at the eaves, it looks like it's flaking. I think that's just a characteristic of the product. - Jim Katen, Oregon Jim has a point. Plenty of builders around here use plywood at the 2ft. projection at the eaves and deck the rest of the roof in OSB. Perhaps this is the reason; to tell you the truth, I've never thought to ask any of them about it. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted May 11, 2008 Report Share Posted May 11, 2008 Originally posted by hausdok Every time I've seen painted OSB exposed at the eaves, it looks like it's flaking. I think that's just a characteristic of the product. - Jim Katen, Oregon Jim has a point. Plenty of builders around here use plywood at the 2ft. projection at the eaves and deck the rest of the roof in OSB. Perhaps this is the reason; to tell you the truth, I've never thought to ask any of them about it. There's at least one local inspector who believes that exposed OSB at the eaves is "against code" because the OSB isn't supposed to remain exposed to the weather. I don't completely share his viewpoint, but it's not entirely without merit. - Jim Katen, Oregon Quote Link to comment Share on other sites More sharing options...
hausdok Posted May 11, 2008 Report Share Posted May 11, 2008 Originally posted by Jim Katen Originally posted by hausdok Every time I've seen painted OSB exposed at the eaves, it looks like it's flaking. I think that's just a characteristic of the product. - Jim Katen, Oregon Jim has a point. Plenty of builders around here use plywood at the 2ft. projection at the eaves and deck the rest of the roof in OSB. Perhaps this is the reason; to tell you the truth, I've never thought to ask any of them about it. There's at least one local inspector who believes that exposed OSB at the eaves is "against code" because the OSB isn't supposed to remain exposed to the weather. I don't completely share his viewpoint, but it's not entirely without merit. - Jim Katen, Oregon I often find it used to sheath the underside of bumpouts - frequently very close to the soil and unprimed and unpainted. Most of the time it's fine - even after many years - but sometimes it's rotting and needs to be replaced. The stuff that's unpainted is usually turning gray after years of exposure without being painted but unless it's actually rotting seems to be fine. However, I invariably tell them to clean, prime and paint the stuff. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
veitenm Posted May 11, 2008 Author Report Share Posted May 11, 2008 Thanks, guys. Quote Link to comment Share on other sites More sharing options...
Richard Stanley Posted May 11, 2008 Report Share Posted May 11, 2008 bumpouts - bum pouts, bump outs ? I don't know if we have those in Texas. What the hell is that / are they??? Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted May 11, 2008 Report Share Posted May 11, 2008 Originally posted by Richard Stanley bumpouts - bum pouts, bump outs ? I don't know if we have those in Texas. What the hell is that / are they??? It's just what it sounds like. A portion of the building that "bumps out" from the wall -- it just projects into space. They were a very common feature on arts & crafts/craftsman bungalows in the teens & twenties. Image Insert: 84.04 KB Quote Link to comment Share on other sites More sharing options...
hausdok Posted May 11, 2008 Report Share Posted May 11, 2008 Dining room bumpouts on bungalows, zero-clearance fireplace bumpouts on new homes, etc. Want to see a real outrageous one? Check out the photo below; the one on the left is for the direct-vent fireplace and then you have the mongo one over the entry. Image Insert: 23.32 KB OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
inspect4u Posted May 11, 2008 Report Share Posted May 11, 2008 Mike O, I'm from Texas and I could easily relate the term "bumpout", to what we call "boxed out", as in a boxed out window. Or at least that is the term that was used when I was supervising the construction of new homes back in the early 80's. Mike M Quote Link to comment Share on other sites More sharing options...
hausdok Posted May 11, 2008 Report Share Posted May 11, 2008 Hi, Yeah, well sure, the construction field, like everything else, suffers from regional differences in terminology. For instance, if I were to start talking about how the window splines had been installed incorrectly around a window, a builder in upstate New York or New England might know exactly what I'm talking about but out here in the West coast they just look like a deer caught in the headlights and go, "Huh?" Then when you explain it to them they go, "Oh, you mean flashings! Hell, why didn't you just say so?" ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted May 11, 2008 Report Share Posted May 11, 2008 Mike, That is one ugggly bumpout.... actually make that one ugly house. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted May 11, 2008 Report Share Posted May 11, 2008 Amen, Mike Whitmore. I'm sure there is some better architectural term for these features. I agree that somebody might not get it. "So what's a bum pout for". Quote Link to comment Share on other sites More sharing options...
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