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Post subject:Some slate and metal work...
 Posted: Mar 11, 2008 - 05:15 AM #7357
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Power User
Joined: Sep 08, 2006
Posts: 86
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| This roof was condemned by a local roofing contractor who claims to be an expert in slate. The stone on this roof is 100 years old and shows no signs of failure. Most of the damage was done by previous repair attempts. They recently had some ridge caps torn off in a wind storm. We replaced 20' of galvanized ridge roll with new TCS2 II, and repaired a few slates around the area we were working on. The stone on this roof is expected to last at least another 100 years. I wonder how many times they'll have to replace the asphalt on the back of the house in the remaining lifespan of the slate? |
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Post subject:RE: Some slate and metal work...
Posted: Mar 11, 2008 - 02:35 PM #7358
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Power User
Joined: Nov 13, 2007
Posts: 106
Location: Omaha, NE
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| I'm surprised they'd of went with steel and slate. It doesn't make sense to go exceptional in one way and mediocre in another. Don't get me wrong, steel is a good material, but it won't outlive or remotely match the life of the slate. |
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Post subject:RE: Some slate and metal work...
Posted: Mar 12, 2008 - 12:15 AM #7362
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Power User
Joined: Sep 08, 2006
Posts: 86
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| Copper can't be used on a roof in this area because it's not historically accurate for a residence. It can be used on institutional and commercial buildings. I think the TCSII will outlast copper anyway, Although it will have to be painted regularly. |
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Post subject:RE: Some slate and metal work...
Posted: Mar 12, 2008 - 04:39 AM #7364
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Power User
Joined: Sep 08, 2006
Posts: 86
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| I personally prefer mitered slate hips with hidden flashing over the ridge roll, but it's very common to finish the ridges with metal in this area. |
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Post subject:RE: Some slate and metal work...
Posted: Mar 12, 2008 - 01:53 PM #7368
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Power User
Joined: Apr 17, 2004
Posts: 249
Location: Central Ohio
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| Interesting that you would not be able to use copper because of historical considerations but would be able to use a more modern 20th century style ridge roll configuration. Also kwhord, look out when nailing on that outside flange of the ridge roll. If water (such as behind a snow dam lower down the roof) finds a nail placed like the one in the photo, it's a leak. |
_________________
Steve
Blissfully Ignorant Copperhead
www.copperthings.com
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Post subject:RE: Some slate and metal work...
Posted: Mar 12, 2008 - 08:59 PM #7370
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Power User
Joined: Nov 13, 2007
Posts: 106
Location: Omaha, NE
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Ridge and hip roll like that are pretty old school. But if they cannot use copper I'm surprised they'd be allowed asphalt shingle.
I was figuring he used a fastener with a rubber and washer, or at least a rubber under its head. It looks dark under the head. |
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Post subject:RE: Some slate and metal work...
Posted: Mar 12, 2008 - 09:34 PM #7371
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Power User
Joined: Apr 17, 2004
Posts: 249
Location: Central Ohio
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| The profile of the ridge roll is a more modern configuration than the old style. It is a small thing, but so is the restriction against the use of copper in residential restoration. I was just picking nits along with whomever makes the rules in kwhord land. As to the use of a washer under the head of the nail, that's not my concern. I would worry about water finding is way between the flange and the roofing beneath and leaking at the point where the nail penetrates the shingles, not at the top of the ridge roll. Capillary action can be a real drag if given half a chance. |
_________________
Steve
Blissfully Ignorant Copperhead
www.copperthings.com
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Post subject:RE: Some slate and metal work...
Posted: Mar 13, 2008 - 03:04 AM #7375
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Power User
Joined: Sep 08, 2006
Posts: 86
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| The slate on the back side where the asphalt is was gone long before the historic distric restrictions were passed. The profile we used on the ridge roll is original to the house, which was built in the 1890's. The screws on the asphalt side are temporary. The stuff is cleated on the slate side. They are slating the back side to match eventually. |
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Post subject:RE: Some slate and metal work...
Posted: Mar 13, 2008 - 04:21 AM #7377
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Power User
Joined: Apr 17, 2004
Posts: 249
Location: Central Ohio
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| Kwhord, my comments aren't in anyway meant as a put down of your work. Just hopefully helpful critique. It's good to see somebody saving slate roofs. Back in the 70's local adjacencies were using federal money to rehab houses and writing some of their own standards, usually calling for complete tear-off of slate for asphalt shingle replacement. I had to do some serious arm twisting to get them to allow me to bid the roofs for slate repair. It was like trying to run in waist deep water, a lot of splashing and effort but not much progress until the late 70's-early 80's when the feds finally realized the inherent value of slate roofs and we finally got some of the specs changed to opt for repair of slate and flashings if possible. Now sometimes is seems the pendulum swings too far the other way such as with the copper on residential buildings. Oh well, it is still much better than tearing them off. That roof by the way looks like it might be from one of the premier quarries in the US. Munson Maine. Some of the nicest grey slate you'll find came from there. Solid slate that would ring like a little bell when you held it by the corner and rapped it with your knuckle, but not brittle like Virginia slate, it would cut like butter. Beautiful stuff! |
_________________
Steve
Blissfully Ignorant Copperhead
www.copperthings.com
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Post subject:RE: Some slate and metal work...
Posted: Mar 13, 2008 - 04:39 AM #7378
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Power User
Joined: Sep 08, 2006
Posts: 86
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This slate is from Peach Bottom, PA. It's one of the hard variety PA slates, not the crud from western PA. This stuff rings like a bell alright!
I think the reason the historical society wants to keep copper off of residential buildings is to keep people from throwing out good old sheet metal roofs, ridges and gutters to replace with copper. You can really use any metal you want as long as it's painted the traditional red or green color. They do allow copper valleys, step flashing, and box gutters. |
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