2/17/2024 0 Comments Malwarebytes adwcleaner 8.3.1I talked with a builder in Steamboat and he said he got his "look" by washing the factory oil off with a mild biodegradable detergent and then washed the metal with a diluted wash of Muriatic Acid, then left it outside for thirty days - it is really cool and looks 100 years old. This may be fashionable, Harry, and you are welcome to do it, but per, U.S. Steel strongly discourages the use of their Cor-Ten® rusted steel for roofing and sidingfor a number of reasons, some of which may apply to all rusted roofs. They offer a painted product, Cor-Ten AZP, designed to look like Cor-Ten (and they're surely not the only company offering such an approach). So approach home-made rusting with caution. 2018: That page appears to no longer by on line. I am writing in response to your link to US Steel's caveat sheet on Cor-ten/Corten roofing and siding and the related discussions. It appears to be common knowledge that these products, when improperly installed, do have problems. Trapped water, overlaps, etc., will all make these prematurely fail. I am also aware of many Cor-ten / weathering steel roofs that have been installed and serviceable for over thirty years. Northern and central California has dozens of applications dating back to the early 1970's. I tested these aged Cor-ten / weathering steel shakes in Kirkwood Meadows, California recently and they had 80% of their original steel intact. I selected metal shakes that were along the eaves (the area with the most wear and tear on most any sloped roof), cleaned the oxide down to bare metal, and measured them. ![]() Mitutoyo digital mic with accuracy to 0.00005", I found the average remaining steel thicknesses were 0.0225", corroded down from the original 0.0280".Įxtrapolating these numbers into life expectancies, follow my logic. If we assume these roofs are replaced with 20% of the roofing material remaining, and divide the corrosion by 30 (for the number of years in place), these roofs would go 122 years before replacement. Just as an added twist, how do we know this level of corrosion was on a straight line for thirty years? Suppose the corrosion reached this 20% level after only twenty or even ten years in place. Now Kirkwood is different than a lot of places so the results may not be the same everywhere. It's in the High Sierras and the roofs' elevations are around 7,000 feet. Its ten-year average snowfall is over 500". There are about 730 species of wood bees (carpenter bees). These bees live all over the world, mostly in forest areas. Most species of carpenter bees live in the tropics.Ĭarpenter bee resembles a bumblebee, but has no yellow color on the body. ![]() The queen of most species of wood bees is black or blue with a metallic tinge, its length is 2.5 cm (1”). Some wood drones are covered by light brown, light green or yellowish-green hairs. Wood bees tend to fly long distances and are able to visit during one flight many flowers. S ome species of wood bees have interesting social behavior. Bees go through several stages of social development, before the family is formed. If bumble bees tend to build their nests in the ground, the wood bees make tunnels in the trees, and then lay their eggs. ![]() Wood bees prefer unpainted timber, such as mahogany, pine, cedar and cypress. Painted or treated wood is less preferable. ![]() Common nests are cornices, window sills, plates, furniture. When the queen wood bee builds tunnels in the wood, the distinctive sound can be heard a few meters away from the nest. If you see a pile of sawdust and a lot of bees flying near a tree, then you can conclude that you are close to a bee nest. Wood b ees build honeycombs in the tunnels. Cells are divided by walls of sawdust and wood, which are fastened with bee saliva. Tunnel entrance is perfectly round, with a diameter of approximately a finger. In Virginia, the queen bee reproduces every year a new generation, but some individuals can live for two years. Different generations of the wood bees come and go in the nest, in which they live for over 14 years. The queen is dominated in their hierarchy, next are bee guards at the entrance to the bee’s nest. Mountain wood bees are located in the western part of North America, the state of Washington and Mexico. The queen is black. Drones are black with white spots on the head and the gray hairs on their chest. The size of the queen and the workers is more than the size of bumblebees, they are large bees. Bees search the nectar at dawn and dusk during the summer, they can be seen around the large nectariferous plants such as honeysuckle. Drones chase each other, and can fight. Mountain wood bees build their nests in fir and mahogany. Each tunnel has length from 13 to 30 cm (6-12”). Wood bees can build several nests in one tree, which weakens the structure of the tree, and it can be lost. Ordinary wood bee has large body( length is 20-27 mm (1”), it is a single insect.
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