Bain Posted August 24, 2007 Report Share Posted August 24, 2007 The photo is of the house next door to the one I was checking out this morning. The thing was approximately 100 years old, so I have to assume the decking was one-bys. But how could they sag so uniformly? The decking could have been replaced, clearly, but in my area roofers typically install OSB on top of the original plank decking if it's shot. Both layers could be sagging, of course, but that would be pretty strange. Has anyone ever been in the attic of a house with this kind of failed roof? I realize it sounds a little weird, but I sat there on the roof this morning, fascinated by the mess next door. Image Insert: 108.5 KB Quote Link to comment Share on other sites More sharing options...
charlie Posted August 24, 2007 Report Share Posted August 24, 2007 looks like shingles over an old standing seam roof maybe Quote Link to comment Share on other sites More sharing options...
hausdok Posted August 24, 2007 Report Share Posted August 24, 2007 Well, it's kind of a far-out-there thought, but what if they stripped off the original wood shingles and then worked their way from the top down, nailing the shingles directly to the rafters without any skip or decking? Or, maybe the original cedar shingle deck is still there and is in pretty bad shape. It looks like it had rotted from the eaves inward, necessitating repairs. If the cedar was rotten enough and old enough it might be sagging under the weight of the comp cover. OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
charlie Posted August 25, 2007 Report Share Posted August 25, 2007 seriously---I think you will find they just hammered the standing seams flat and then just shingled over it Quote Link to comment Share on other sites More sharing options...
Bain Posted August 25, 2007 Author Report Share Posted August 25, 2007 Both notions seem plausible. What kind of knucklehead thinks sheet metal will suffice for decking? Then again, it's probably been done many, many times with similar results. John Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 25, 2007 Report Share Posted August 25, 2007 Charlie is correct. I've probably seen a couple hundred. What kind of knucklehead thinks sheet metal will suffice for decking?Old metal roofs are always over solid planks here. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted August 25, 2007 Report Share Posted August 25, 2007 I've seen multi-layered asphalt shingles look like that. So much weight that deck is swagging between rafters, roofers just keep piling it on. Quote Link to comment Share on other sites More sharing options...
hausdok Posted August 25, 2007 Report Share Posted August 25, 2007 Originally posted by Jim Baird I've seen multi-layered asphalt shingles look like that. So much weight that deck is swagging between rafters, roofers just keep piling it on. Huh, I had a roof with no less than 6 layers of asphalt on top of a 3/8" plywood deck and there wasn't any sagging like that. OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
SonOfSwamp Posted August 25, 2007 Report Share Posted August 25, 2007 I vote shingles over standing seam. Seen it lots of times. WJ Quote Link to comment Share on other sites More sharing options...
hausdok Posted August 25, 2007 Report Share Posted August 25, 2007 Wow, If that's the case, they would have taken a roof that can last 100 years and stuck a 20-year product on top of it. What a shame. OT - OF!!! M. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted August 27, 2007 Report Share Posted August 27, 2007 Hey Mike O', The one or ones I saw looking like that were shingles piled on top of old wood shakes that had been put on skipped nailers. Quote Link to comment Share on other sites More sharing options...
InspectionConnection Posted August 27, 2007 Report Share Posted August 27, 2007 I have a couple of questions, How would you guys report this condition and what actions would you recommend? (if this was indeed the house being inspected) Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted August 29, 2007 Report Share Posted August 29, 2007 Without a look from underneath I wouldn't render a description. Quote Link to comment Share on other sites More sharing options...
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