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1984 Metal roof on jail makes the local news

Geo-TH,In

Geo-TH,In

Well-known Member
There are some who think metal roofs will last forever. On the local news, it showed a metal roof on jail in need of repair. Roof was put over plywood and plywood showed signs of water damage. I'm sure some will blame how the roof was installed. I can't help but think that either the screws worked loose, the rubber gasket used on the screws deteriorated.

BIL had a metal roof on a very large boat storage building. He couldn't stop it from leaking, even replaced all the screws. He had no choice but to put a second metal roof over the other one.
Metal roof on the local news
 
Ive never seen a plain old barn metal roof that does not drip in at least one place. I don't know much about the high priced metal you can put on a house. I assume it is better with the higher interlocking ridges. The gymnasium at the school i went to was built in the early fifties with a round metal roof. When i was just a little kid in the later fifties I remember the custodian wiping the water off the gym floor after rains.
 
What state is that in?

It hit close to home 'cause our county is in the process for letting bids on a new $12 million jail and criminal justice center.
 
My house has 1 section with a metal roof less than 10 years old. The other part is a standing seem metal roof. A few years ago I redid the roof on the porch to match the slant of the house roof right along side of it. I used the new green sheet metal. Stenciled on the bottom of the old metal roofing it said "GUARANTEED UNTIL 1928 " It also had the name of the man who put it on. I cut out a section with the stenciling on it and have it in the garage.
 
They put a shingle roof on our new school when it was built 5 years ago.It was cheaper and would make the bond issue easier to pass. Now there spending 100000 to replace the roof with a metal one.
 
One problem with the metal roofs is that they have recommended for years to use screws with gaskets to hold them down. Further they recommend putting the screws in the valleys, rather than on the peaks. To me that is nothing more than an invitation to leak.

Dad built his second shop back in the 70's using 5V roofing tin. It was attached with long roofing nails, with the lead seals, and the nails were put in through the peaks of the tin. The property was sold, and they just tore down the shop a few months back. Until the day they tore it down that roof never leaked a drop that I can remember.
 
5 years on a roof? What did they do - have track practice on the roof? If they had a clue on what they were doing it should still be under warranty from the builder - much less the material supplier.
 
That's 32 years. Most painted roofing carries a 30 year warranty. Most galvanized needs to be coated at the 20 year mark or so with the aluminum roof coating. I dunno, but I figure 32 years is pretty good life out of any roof material these days. The last shingle roofs we put on around here only lasted around 20 years before they started leaking. The shingles before that on the same roof lasted about 60 years. The oldest roof we have here with the gasket style screws is 21 years old now, so it will be interesting to see how long they hold up.
 
I will never put the screws or nails in the valley.
Asked a young roofer a few years ago about the neoprene washers going bad as the roof heats and cools and moves. His response was "those washers are guaranteed for six years". Enough said.
Richard in NW SC
 
When we remodeled the farm house about 12 years ago, we added on, and in the process, reroofed the entire house. Had to remove manufactured slate tiles from the original roof from 1927-could not match them/tie in new for a reasonable amount of money. We did remove them intact for resale. The roofers were amazed at the felt paper under the slate- was about the thickness of rolled roofing today. And the sight of 3 foot wide copper spanning the valleys under the felt, like brand new, was something to behold.

Back in the 70s we had torn down the old hired man's house on the farm, I remember taking all the lead washers off from the metal roof nails and pounding them into one giant ingot...
 
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