Mpls. Convention Center topped off with plastic surgery

  • Article by: ERIC ROPER , Star Tribune
  • Updated: March 28, 2012 - 7:37 PM

Three of the Minneapolis Convention Center's four copper-clad domes will be reroofed with PVC.

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entzelbMar. 28, 12 8:55 PM

I would hope the city gets the scrap exchange for the copper coming off of these three domes. That should be a significant amount considering how in demand copper is now.

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alanam8Mar. 29, 12 3:02 AM

Just for public accountability's sake, I'd love to know who from the city signed off on those copper domes, and if - at the time - that person was informed that they'd barely last two decades. Is the decisionmaker still on the city payroll?

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jessy03Mar. 29, 12 5:55 AM

It says the PVC ones will last at least 20 years - what does that mean? 25 years? 35? If not, It doesn't sound a lot better than the longevity of the copper on them now. Wonder when the current material began leaking?

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mnmonkeyboyMar. 29, 12 7:55 AM

I'm confused, the current roof leaks and some of you want to blame the city emplyoee that signed off on the deal. That is ridiculous. I had a new roof installed and it leaked...but I am not responsible, the installer is (or architect). Like any consumer, the city does not have all expertise and has to rely on vendors. It is the vendor that has the responsibility. I'm guessing the city council and mayor signed off...the comment implies that they need to get an engineering degree

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smeeagain2Mar. 29, 12 9:01 AM

Where will the money come from for these types of maintenance repairs, once RT and the Council hand over all the downtown tax revenue to the Vikings? I guess they'll just have to let the roof leak and the power bill go unpaid.

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FrankLMar. 29, 1211:52 AM

The big difference will be that they won't have to constantly patch and seal the PVC like the copper roofs. I'm sure Greenpeace will be raising heck, using evil PVC instead of a natural material.

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reader2580Mar. 29, 1210:02 PM

Does the city and/or the convention center have the money set aside for this roof replacement? The first time this came up in conjunction with the Vikings stadium there was not an indication they planned to replace the roofs immediately.

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reader2580Mar. 29, 1210:05 PM

I'm sure the city is not just giving the copper away to let someone else get the scrap value. I suspect the roofing company will get to keep the copper in return for reducing the total contract price by the amount they get for the scrap.

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tnarchitectMar. 30, 12 7:50 AM

Your dome report came to me via the NRCA newsletter. I am an Architect who has worked on roofing issues for the past 50 years, and have been to your fair city. Your article did not state how old the original domes; actual experience indicates that, properly designed and installed, a copper dome can last 100 years (we redid one here in Central NY recently). I have no basis for understanding the costs given, but assuming a copper dome lasts 5 times longer than the membrane listed- it is no-brainer - the copper is far cheaper. Every 20 years, using your numbers, the PVC woof will fail, there will be some collateral damage to repair, and then reinstall another. For certain, the new roof will cost more than the original one, by any measure. I happen to also think that the copper roof patina may look better in the city landscape. I have personally also installed pvc membranes, which as a group have performed well. This is not an attack on the PVC as a system. Toby Nadel, Architect AIA emeritus, CSI emeritus, ASTM

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mycityApr. 1, 1211:31 AM

Hey.... shout out to my friend on the roof. Nice shot!

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