Author Topic: Metal Roofs  (Read 3445 times)

CentimentalFreedom

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Metal Roofs
« on: April 05, 2014, 08:14:56 AM »
Hi Mustachians!!

I live in an area where there are multiple snow storms and bad weather. Someone told me that steel/metal roofs make a lot of noise when it rains and the snow can slide off of it kind of like a mini avalanche. Does anyone have experience in this area?


NV Teacher

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Re: Metal Roofs
« Reply #2 on: April 05, 2014, 10:49:28 AM »
Hi Mustachians!!

I live in an area where there are multiple snow storms and bad weather. Someone told me that steel/metal roofs make a lot of noise when it rains and the snow can slide off of it kind of like a mini avalanche. Does anyone have experience in this area?

My dad put one on our roof years ago.  I don't notice much noise when it rains but then we also have a well insulated attic.  They are right about the snow.  You don't want to be standing next to the house when it slides off.  It could be painful.  But then it's painful to slide off the roof when you are up there shoveling the snow off it in the middle of the winter also.

Sphinx

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Re: Metal Roofs
« Reply #3 on: April 05, 2014, 11:18:37 AM »
This is my first post here, so please forgive me if I do something wrong. 

I have a metal roof on my 150 yr. old brick house in a small town in rural Ontario.  It was installed in 2004. I bought this place when I took early retirement in 2003. I had a home inspection, and knew what was involved before I bought. I had a budget, and most of the other renovations have gone very well. I love old houses, with large porches, sun-rooms, firelplaces, and big gardens -- all of which, this house has.  I very much enjoy living here, and am near family. They like to come here and visit. I lead a simple, frugal, happy life.

 Back to the roof -- although I like metal roofs in general, my experience was not the best.  My roof does not leak, and stands up to heavy winds.  It came through a terrible wind storm completely unscathed, when most of the houses with shingles in my neighbourhood had damage.The sound of the rain does not bother me at all.  My problem is that I bought an expensive stone-coated metal roof from Duraloc.  I justified the extra expense, thinking it would last 50 years, as per the warranty,  ( company had been in business for 75 yrs. and I admired the roof they put on a home near my parents place, in another city --researched online, and found no complaints at the time -- many now ! )and the stone coating looked beautiful, but was also supposed to guard against hail, and it prevented the snow from sliding off all at once.  For 7 years I was happy, but did not know I had a problem.  These roofs all had defective stone coating, which comes off, especially on the south side of the house, because the stones are translucent, and burn off in the sun.  One is left with a roof with large brown patches that look like rust. This is the brown primer underneath.  Duraloc was bought out by Allmet, in 2006, who did not take care of the warranty.  That was supposed to be the old Duraloc, which became a numbered Ont. company, 2 years after I bought my roof. They went bankrupt, and now the 50 yr. warranties are worthless.  No one seems to know what to do. The contractor who installed it, and sold it to me, did a good job installing it, and he is not liable. He suggested replacing the roof. I cannot afford that, and hope that some kind of metal paint will work, but so far I have not found much help. Everyone says it will not stay on, and it will be expensive.  I wish I had never tried a new product which had not been properly tested in the market, but I was naive -- never renovated an old house before, and in future would use the standing seam, baked on painted type of roof Mr. MM has installed on his home.

Can anyone offer any suggestions ?  I have talked with other people online who have this problem roof, and they either decided to cut their losses, and sell the house, or just let the stone come off, and look terrible.  No one seems to have a good re-coating solution.  Since my roof does not leak, I am living with an ugly roof at present. Eventually I think the silver galvanized metal will show, and need some kind of coating to protect it.  My problem is compounded by the fact that I have a large roof on the house, and also had a carriage house/garage done too.  It is not a small roof that is easy to replace. .  I would appreciate any help.  Thanks.







Greg

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Re: Metal Roofs
« Reply #4 on: April 05, 2014, 11:44:43 AM »
I live in an area where there are multiple snow storms and bad weather. Someone told me that steel/metal roofs make a lot of noise when it rains and the snow can slide off of it kind of like a mini avalanche. Does anyone have experience in this area?

If installed directly over a plywood deck, standing seam roofs don't make a lot of noise in rain.  Other, much worse installations can cause noise.

The snow concern is valid though.  In a snowstorm a couple of years ago, the snow (about 14") was followed by freezing rain which caused a lot of tree damage, and the sliding snow off our roof (10/12 pitch) damaged our upper roof gutters.  My simple solution was to remove them and let the upper roof drip onto the lower roof.  Also, less gutter to clean.

To prevent this, there are small brackets that can be applied to the slope of the roof near the edge, to catch the snow and prevent it from sliding off.  If you study schools and firestations you might see these in place, especially where the entrance or other doorway and walkways are below.  They come in a variety of shapes and materials.

Another way to compensate is to design the ground level infrastructure to deal with it, meaning pathways and plantings not in the drop zone.

Greg

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Re: Metal Roofs
« Reply #5 on: April 05, 2014, 11:47:47 AM »
This is my first post here, so please forgive me if I do something wrong. 

Your question would be best put in a new thread.  But I'll answer it a little, recoating might be the only way to fix your problem.  Another solution could be using a pressure washer to try and remove the rest of the granules.  This kind of roofing should probably never have been made.  I'm always wary of coatings and even painted metal, my metal roof is bare zincalum.  No paint to fail, ever.

And of course a warranty is only as good as the company behind it.  Sounds like your manufacture figured out how to get out of the warranty claims.  I bet many of the same people work for the new company.

deborah

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Re: Metal Roofs
« Reply #6 on: April 05, 2014, 05:55:24 PM »
In Australia, many roofs are metal. They make a lot more noise than other types of roofs when you don't have insulation, but insulation really deadens the noise. Here we have R4 insulation (at the most) because the climate is much warmer. I imagine that R50 would deaden anything!

Older houses used to have the silver roof showing. In the 60s, 70s and 80s, metal roofs were seen as being "cheap", so people painted their silver roofs. A number of suburbs included covenants that excluded metal roofs. Then companies came out with "Colorbond" which has a coloured coating, and also "colorbond" metal tiles (so they didn't look like a one piece metal roof and to get around the covenants). Now it doesn't really matter what colour your metal roof is, and I don't think metal tiles are as common as they were. Painting your roof may make it much more uniform. If it is done with proper metal paint for roofs, it should last and you can even still catch the water in a tank for drinking. You would want to test an area first to see how uniform the colour ends up.