What Is The Best Way To Clean Moss Off Of Shingles

A reader wants to get this moss cleared off an asphalt roof without damaging the shingles. (Reader photo)

Q: We take a "green roof" that is not meant to be greenish. Moss (I approximate it is moss) is collecting on one side of the asphalt roof. The roof is otherwise in good shape. What I take learned so far is that the roof should not exist power-washed. How should one remove the growth, and who does this type of work? I am non interested in getting on the roof myself.

Falls Church

A: The Asphalt Roofing Manufacturers Association distinguishes betwixt moss, a establish with leaves that can grow into thick clumps, and mold and mildew, which are common names for types of algae that simply discolor the surface. Algae creates ugly black or brown streaks merely doesn't damage a roof. Moss — which is what shows in the pictures you sent — is more worrisome because it can damage cobblestone shingles. A thick growth of moss works like a sponge, keeping the roofing damp for long periods, and it can lift edges of shingles, making them vulnerable to bravado off in a windstorm.

To clean either algae or moss, the association recommends putting on protective gear and protecting plants, spraying with a 50-50 mix of household bleach and h2o, allowing that to sit for at least 15 to 20 minutes and then rinsing with low-pressure level water. The bleach will kill the algae or moss, simply rinsing won't necessarily leave the roof sparkling clean. "Algae will disappear and wash away with subsequent rains," the association advises. "Moss will loosen over time and may exist removed with a leafage blower."

Ted Saunders, owner of American-ProTech, a roof-cleaning visitor with offices in Falls Church and Montgomery Canton (571-250-9650 for Falls Church; theroofcleaningcompany.com), echoes the alarm not to wait the moss to disappear instantly. "Information technology will look much worse before it looks better," he says, calculation that the moss will plough white or yellowish at first. Depending on the weather and sunday exposure, he says, it may have eight weeks to six months for the dead moss to decompose and be rinsed or blown away by weather.

A reader hopes to remove the tea stains from this teacup. (Reader photo)

Don't be tempted to blitz getting the moss off faster past having someone power-launder your roof, or scrub in the bleach solution, or brush or scrape off the moss — even though you lot may notice advice on the Web recommending these as long as you are gentle. All of these methods can take off the roofing granules, exposing the shingles to the full burden of the dominicus'southward UV rays. And so the covering is likely to neglect prematurely.

Saunders agrees with the basic advice from the roofing manufacturers' clan, especially warnings not to power-wash, scrape or scrub, but he instructs his crews to deviate in i item: His workers do not rinse off the bleach solution because that creates a lot of caustic runoff that damages plants. He says his visitor has never found any downside to merely leaving the bleach solution on the roof. The chlorine in the bleach evaporates into the atmosphere, leaving salty residue behind, but that's no more salt than if the roof had been rinsed.

American-ProTech usually brings an articulated lift, so workers rarely need to be on the roof. The company'southward minimum charge is $350. On a typical home, the company tin can ordinarily clean the north side (often the just side that needs information technology) for a toll in the mid-$400s, Saunders said.

Jon Quinn, co-possessor of Smart Wash in Alexandria (703-595-4000; washsmarter.com), said his company uses a similar arroyo, except that his crews work from ladders. A typical charge for a single-family domicile ranges from $450 to $750, he said. The company's website touts use of "a custom cleaning solution, specially blended to see demands of each project." But in most cases, the solution used on roof moss is bleach and h2o, he said. If a customer does not desire that, the coiffure offers some other pick.

I have a couple of Corelle coffee mugs with deeply ingrained tea stains. I've tried soaking them in vinegar and in vinegar mixed with baking pulverization. Zippo worked. I even tried cleaning with Scotch-Brite without success. Any suggestions?

Chantilly

Most pieces of Corelle dishware are made of Vitrelle, which consists of two types of glass laminated as iii layers. Originally introduced by Corning Glass Works in 1970, Corelle is at present manufactured and sold by Globe Kitchen (worldkitchen.com).

However, the cups and mugs that come up with Corelle sets aren't glass because the lamination procedure does not work well for these shapes. The cups and mugs are stoneware or porcelain, depending on the fashion. For both materials, the company recommends removing tea stains with a not-abrasive cleaner such as Bon Ami or by filling each cup i-quaternary full with vinegar and then rubbing with a newspaper towel. The company warns non to apply chlorine bleach, which it says will lighten the stains simply not remove them.

A phone call to the Globe Kitchen help line yielded a few other suggestions. Katie Stewart, a consumer care representative, suggested using lemon juice and baking soda, or blistering soda lone, or Bar Keepers Friend, a powdered cleaner that contains oxalic acrid. You've already tried vinegar, which is chemically like to lemon juice, but lemon juice is often more acidic than vinegar, so at that place's a risk information technology would work. Baking soda is element of group i, so using it alone may brand it more effective than mixing information technology with something acidic.

If the stains persist, consider them permanent. Stewart said this could happen for several reasons. Many people don't realize that the visitor warns against leaving stoneware or porcelain soaking in water for a long period. The wet gets past the glaze and into the clay, and if oestrus is practical after the cups soak, the coat can cleft. That would allow the tea to stain the dirt — a permanent change. Or the clay could be stained considering you accidentally scratched the glaze with an inappropriate blazon of Scotch-Brite pad. Scotch-Brite is a brand for numerous types of cleaning products. Some cleaning pads don't scratch and are fine to use on porcelain or stoneware. Merely others, such equally the green mesh Heavy Duty Scrub Sponge, are as aggressive as steel wool and do scratch ceramic coat.

If the stains are permanent, you might want to buy replacement mugs. Stewart looked at the picture y'all sent and identified your pattern as Apricot Grove. It is not currently shown on the World Kitchen website, simply yous can telephone call the World Kitchen Consumer Care Middle (800-999-3436) to order it, as item No. 1079909, at $iii.99 per mug.

Accept a problem in your abode? Send questions to localliving@washpost.com . Put "How To" in the subject area line, tell us where you alive and try to include a photo.

Source: https://www.washingtonpost.com/lifestyle/home/how-to-remove-moss-from-an-asphalt-roof/2016/01/19/5200fc0a-b497-11e5-9388-466021d971de_story.html

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