If your drive for spring cleaning demands a clean house inside and out, you may wonderwhat to do with those dirty shingles.Before you pay high costs to replace your roof, try cleaning it.In high-humidity areas, roofs often turn dark brown or black within five to seven yearsbecause fungi and algae feed on dirt in shingles.The fungus can start growing on a new roof right after the first shingle is laid down,says Dale Dorman, a housing specialist with the University of Georgia Extension Service.”The growth first appears as black streaks or wedge-shaped areas that spreadacross the roof,”> Dorman says. “After a few years, the discolored areasmerge, and uniform discoloration eventually results.”Fungus and algae growth is usually heaviest on west- or north-facing roofs or onthose shaded by trees,” she says. “Dew dries more slowly in these areas.”The good news is that these stains don’t mar the roof’s strength or service life.Research at Mississippi State University found several chemicals can remove shinglediscoloration caused by fungi, algae and lichen.”One of the best cleaners is liquid household bleach,” Dorman says. “Andit doesn’t damage the shingles.”Apply a 75 percent solution of household bleach (three parts bleach to one part water)to asphalt shingles. Use one gallon of solution per 30 to 50 square feet of roof surface.About 15 gallons of bleach will treat 1,000 square feet of roofing. “Roofs will remain clean for at least five years if sprayed with the 75 percentbleach solution,” Dorman says.Cleaning power decreases with less bleach. A 10 percent bleach solution will kill thefungus, but it won’t clean the roof immediately. The dead organisms will eventually washaway with rain. But the roof will remain clean for only about a year.Clean your roof in strips starting at the peak and working toward the eaves, Dormansays.”Treated roofs are slippery when wet, so work from a ladder,” she says.”Use a clean garden sprayer to apply the mixture.”Avoid skin contact with the solution,” she says, “and cover any shrubsor plants below the eaves with plastic. Dilute any solution reaching the ground byspraying it with water.If you have rain gutters at the eaves, remove all leaf screening and place a gardenhose in the gutter. This will dilute the solution as it drips from the roof. You don’tneed to scrub the roof or rinse off the solution.”While cleaning the shingles, look for damage on your roof,” Dorman says.”Note cracks in the shingle surface, curling corners, buckling front edges or loss ofgranules.””If you have to reroof, use a fungus-resistant shingle that carries a 20-yearlimited warranty against fungus growth,” she says. “The shingles release zincgranules when it rains, destroying fungus and algae.”The fungus-resistant shingles offer an inexpensive way to maintain beauty, Dorman says.
Falling wind, solar costs could strand billions of coal investment dollars, study finds FacebookTwitterLinkedInEmailPrint分享Bloomberg:Keep pouring money into coal-fired plants and it won’t be just the fuel that’s getting burned.As much as $60 billion of coal power assets may be stranded in the next decade across Vietnam, Indonesia and the Philippines, according to a new study by Carbon Tracker, which cited tighter environmental policies and competition from cheaper renewable energy. That analysis is aimed to caution those contemplating new coal plants.The findings underscore how quickly advances in renewable energy are changing the power landscape. New wind and solar plants may become cheaper than coal in those countries, which are planning a combined $120 billion in coal investments, by the end of next decade. The analysis is also part of a growing type of advocacy that, instead of focusing on the dire outcomes of climate change, targets investors and financial institutions by forecasting economic risks.New coal plants require billions of dollars in upfront investments that will be paid back over years of selling electricity to homes and businesses. They helped fuel industrial revolutions in Europe and the U.S., and supply the vast majority of electricity in China. And now they’ll be powering Southeast Asia’s economic expansion. Coal is the fastest-growing energy source in the region through 2040, according to the International Energy Agency. That’s due to abundant resources in places like Indonesia, relatively low costs and government policies that prioritize access to reliable and affordable electricity over decarbonization.Falling renewable costs could unsettle that outlook, according to [Carbon Tracker’ Matt Gray]. New solar plants may become less costly than operating existing coal projects by 2027 in Vietnam, 2028 in Indonesia and 2029 in the Philippines. As more of that cheaper solar and wind generation is added in those countries, coal plants will go idle more often and struggle to generate revenue needed to repay their loans, Gray said.Companies are already heeding the warning signs, according to Wood Mackenzie Ltd. Beyond the plants already under construction in Malaysia and Vietnam that will boost the region’s coal capacity from about 40 gigawatts to 70 gigawatts when they’re completed, only a handful will be built, coal analyst Pralabh Bhargava said by phone.More: Wind, sun to strand $60 billion of coal assets in Southeast Asia
We are going to begin with some kudos to Smith Fuels, who yesterday made a donation of 5 thousand bucks to North Peace Kidsport.Kidsport, as you are probably all aware, is a program that helpspay for registration or equipment, so that kids whose parents wouldn’t otherwise be able to afford it, can play sports – families are eligible for upto $200 bucks per child per season, so 5 grand will go a long way, nice job Smith Fuels.- Advertisement –