I did see those corrugated asphalt panels, I think in one of your posts before. What kind of support do you have under them, how much do they sag, how stiff are they? I can't find them at HD, only Lowes and that is just as far as the metal roofing supplier, I'll check the local places they can usually order anything if they don't already have it. There is no joinery on the pole/pole connection, just brute force, butt them together and run a 4 or 5 inch star drive outdoor wood screw through, an impact driver helps a lot, and you have to do all the fitting/measuring "in situ" to account for irregularities in the poles. The pole/pallet joinery is just to make the joint flat and pretty rough...done with a chainsaw. Here is a picture of an edge and a corner, the corner picture doesn't really show very well as the angle needed for the picture is now full of wood, but you get the idea.
Since Apple only consitutes about 20% of the market, Apple users must adapt to a PC-centric world. If the federal courts get involved, it will be the other way around.
I like the looks of that corrugated asphalt shingle stuff, and would prefer it over regular asphalt shingles. If you used screws to install it instead of nails they recommend you might even have some chance of reusing the material. However some of the down sides of the stuff over metal roofing is, I believe, they recommend that you use a sheeting base instead of 1/4 strapping, which instantly drives the total roof cost up significantly, possibly even higher than metal. You'd have to price it out to find out for sure. The specs also say it should not be used on roofs with a slope of less then 3/12. Also because it is asphalt it will get brittle in the cold, and soft in the heat, you have to be careful about the times you install it, and/or if you ever walk on it. And finally, like all asphalt products exposed to the sun, it will eventually degrade and need to be replaced. The one place I would recommend asphalt over metal roofing is areas close to the ocean, where the salty ocean sea spray can corrode metal roofs, but apart from that I have never seen the slightest rust or corrosion inland on any of the metal roofs I've installed in my lifetime. I have seen rust on some very old galvanized metal roofs, but I'm pretty that was a problem with the inferior metal or galvanization process on that old roofing material they manufactured back then. They have since improved the manufacturing process.
The price on that stuff can sure fluctuate, I watched it go from $5 to as high as $28 a sheet for 3/8" osb, then go back down to $5 for a while , it's up to about $18 here now.
I had not heard of Ondura before this thread. In reading the installation guide, they specify it can be installed over purlins (without sheathing), spaced 24 in. O.C., closer in areas of snow load. This is the same as corrugated metal installation specs. Heat and cold should not be a problem, the Ondura is a cellulose mat (providing the structure) impregnated with asphalt. It comes with a lifetime warranty (10 years for the coating), with no exclusions for extremes of temperature. As for rust on corrugated, the basic product has remained unchanged since its invention. The steel is electro-plated with zinc. The reason the steel doesn't rust, even in areas where the steel is exposed, is because the galvanic potential between iron and zinc favors corrosion of the zinc, protecting the steel. This is a sacrificial reaction. Over time, the zinc is gradually depleted, which reduces the protection provided to the iron. The zinc will be eliminated first in areas where it is protecting exposed steel, at raw edges and penetrations. This is where rust will first occur. Modern products are definitely made of thinner steel and probably have a thinner zinc coating. It just takes time for the thinner coating to reveal itself.
Any users of Apple or Android devices, need to take the pics in Wide angle.. Or in other words, the "Home" button must be one the right side (phone or tablet sideways). This will make all photos right side up for everyone. If button is down, pic is sideways. If button is to the left, pic will be upsidedown.
Have to go over it with the Scotty and see if it should go in certain Forums? Or all? And we would need to also include "General" pic posting
I did some more research, you are correct about the Ondura being able to be installed on purlins, or strapping, I had only seen it installed flat surfaces, never on strapping, so I incorrectly assumed it couldn't be installed that way. As for the rust, electro-plating isn't the only one way they zinc coat metal, hot-dip galvanizing is another very common process for galvanizing. Also a lot depends on just how thick a coating they put on the metals, and over the years they've tweeked and refined steel alloy making procedures and quality controls and are producing much better corrosion resistant steels then they've had in the past. So I don't really buy that nothing has changed since the early days when they first learned how to galvanize metals. As I said, I like look of the Ondura roofing, but it's only been around for a while, time will tell if it really lasts as long as they are promoting. Right now it seems to have a price point a little less than metal, but my guess is once consumers start making a lot of claims against their "lifetime" warranty the price will shoot up. I remember when vinyl siding first came out they had claims it would last forever. You can already find a lot of non-favorable reviews. If you are interested, you might read some of these comments. http://www.bobvila.com/posts/9181-dare-i-ondura-roofing. Normal asphalt shingles often have 25 year warranties, some people are having problems with Ondura after less than 10 years. As for me, I built a metal roof over a storage shed at my last house, I picked up some used metal used roofing from a guy who scavenged it from a large commercial building he tore down. I'm not sure how many years it covered that commercial building, but it sat on my shed for about 14 years until I moved about 5 years ago when I dismantled that shed and brought the metal roofing here. About 4 years ago I built another storage shed and used that same roofing, where it sits now. So it's been used on 3 different buildings, no rust, and apart for a few dings in the metal, from moving it around so much, it's in great shape. I just can't see getting that kind of usefulness out of any other roofing material.
I went with metal from the local distributor...gotta go pick up the order on Fri. Six 3'x11' sheets and a bag of fasteners was $170, I will have 2' overhangs front and back and 1' overhang on the sides, and fasteners left over for the next shed. I would have needed 8 Ondura panels at $21 per panel =$168 and no fasteners and no side overhangs. I think the price for the metal is a little better than you would get at a home improvement store, because it is directly from the distributor, but I have to go pick it up.
