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Jimney's Chimneys Inc.
Silver Spring, MD
Phone: 301-989-3300 • Fax: 301-989-9098
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Frequently Asked Questions
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How often should a chimney be cleaned? The Chimney Safety Institute of America recommends an annual inspection for any aging or other structural damage, even if the fireplace is never used. When a chimney collects approximately ¼” of build-up, it is time for a cleaning. Depending on the type of wood, and the way a fireplace drafts, a cleaning is recommended per every cord of wood burned.
I have screening on my chimney. Why do I need a chimney cap? Screening does not protect from rain nor prevent harmful sparks from flying. Screening is especially susceptible to animals (especially raccoons) that tear the screening apart when it begins to rust. Screening is made out of a galvanized material, whereas our chimney caps are rustproof stainless steel.
The plumbing and heating contractor inspects my furnace and hot water heater every year. Does this mean my home heating is safe? Usually, heating contractor inspection ends at the wall crock where the flue or the base of the chimney starts. There may be problems inside the flue that can promote the risk of carbon monoxide leakage into living space. It is important to have your heating appliance flue inspected by a chimney/flue.
I have an oil-burning appliance. I don’t need to worry about fire or carbon monoxide problems, right? Wrong. The oil soot is very flammable and produces carbon monoxide. Just like a gas burning appliance, the combustion process of oil still produces carbon monoxide. The levels of carbon monoxide may not be as high, but they still pose a serious threat. A bi-product of an oil appliance is sulfur dioxide. When mixed with moisture, it turns into sulfuric acid. This acid erodes away at terra-cotta clay file flues, causing gaps in the flue where fumes can escape into living space, or causing the flue tiles to collapse and block the vent completely. Hot water heaters are often vented into this same flue and can be gas burning even if the boiler or furnace is oil.
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HELP! I have raccoons in my chimney.
How can I get rid of them?
 First, are there babies in the chimney?
- If you hear mouse-like squeals from above your fireplace damper, chances are they're coming from baby raccoons. March through June is usually baby time. If you know that there are young in the chimney, wait as long as possible before you attempt eviction. Not only will relocation of the nest be easier on the older cubs but mother coons generally move the babies on their own when they are about 8 weeks of age. So if at all possible, just wait.
Raccoons dislike bright lights, loud noises and strong odors.
- Place a radio in the fireplace. Tune it to a loud rock or talk station, with the volume set as high as you can take. Leave it playing all day long, to disrupt the raccoon's sleep.
- If the flue is partially open, some suggest placing a bright light in the fireplace shining up into the chimney. Others suggest closing the damper securely (to prevent the raccoons from falling through) and hanging a mechanic's trouble light down the chimney.
- Do NOT start a fire in the fireplace to smoke them out. This can be dangerous to you and fatal to the raccoons.
- Place rags soaked with dog urine (or predator urine available at hunting supply stores) in the fireplace or lower them into the chimney. DO NOT pour ammonia down the chimney and/or bags of naphtha flakes or moth balls! If there are baby raccoons in the chimney, concentrated ammonia vapors or other caustic mixtures can damage the infant raccoons' mucous membranes. (I recommend only an amonia soaked rag in the fireplace).Because of the danger of rabies and other diseases and just plain agitated wildlife, avoid any confrontation with the raccoon itself. A mama raccoon might misinterprete your intentions as a threat and attack in defense of her babies. If a raccoon scratches or bites you, it will have to be killed and tested for rabies.
- To heighten your success, before evicting the raccoon, you might want to make provisions for an enticing den for the raccoon away from your house (this can be anything from a woodpile to a wooden box with a small opening, perhaps lined with blankets). You may want to make a trail of dry dog kibble leading to the den.
- Keep pets inside while eviction proceedings are under way. Mama raccoon might not move her babies if your pets are outside.
- Unless it is one recommended by a rehabber, call animal control or pest removal services as a last resort. Very few relocate raccoons and while some may have a rehabber they bring wildlife to, most have no alternative except to euthanize the raccoons. Relocating raccoons is not really the answer anyway. It is far better and easier to use one of the above methods to encourage the raccoons to relocate themselves.
- Raccoon Eviction Fluid ??? (Click for link to order from "Wildlife Control Technology" website).This stuff is touted as being designed for use on female raccoon and their young. While the testimonial for this product for sale on this professional nuisance wildlife operators website is fascinating reading, the raccoon eviction fluid sounds almost too good to be true. Who knows. Might be worth a try.
Hit the road Jack, and don't come back no more, no more.
- Once you are absolutely certain that the raccoons have moved, call a chimneysweep to remove debris and have the chimney professionally capped or screened to prevent raccoons or other wildlife from nesting there again. Raccoons can quickly get through amateur cappings and a mother raccoon will literally tear apart your roof if you cap one of her babies inside your chimney.
- If the raccoon was using the chimney for a while, it may have been urinating and defecating on the roof or gutter. Wear rubber gloves and a mask and clean up such waste promptly, burying or burning the feces. Raccoon feces can harbor organisms (such as the parasitic raccoon roundworm known as Baylisascaris procyonis) and if left exposed pose a hazard to humans and wildlife.
Our recommended services after the raccoons are gone:
1. Chimney cleaning to remove debris, nests, fur, etc.
2. Chimney cap to prevent "guests" from returning.
3. Treatment = disinfectant, deodorizer, bug killer.
4. (Done by homeowner 7-10 days after 1st treatment), use a fogger or bug spray to kill bugs hatching from eggs.
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Chimney Check Can Save Lives:

ANNUAL CHIMNEY INSPECTION HELPS PREVENT FIRES AND CARBON MONOXIDE POISONING
Storks nesting in chimneys were once believed to bring good luck, according to European folklore.
But, in fact, nests in chimneys, or blockages of any kind -- are nothing short of bad news. They can cause smoking problems, chimney fires and carbon monoxide poisoning.
In 1994, there were 32,500 residential fires in the United States originating in chimneys, fireplaces and solid fuel appliances, according to the United States Consumer Product Safety Commission. These fires resulted in 220 personal injuries, 70 deaths, and $181.8 million in property damage.
Virtually all of these fires were preventable, according to the Chimney Safety Institute of America (CSIA), a non-profit foundation dedicated to public and chimney professional education. Both CSIA and the National Fire Protection Association recommend yearly chimney inspections to help prevent these hazards.
Many American homeowners think their chimneys only need to be cleaned and inspected if they burn wood in their fireplaces or woodstoves. But almost all home heating appliances, whether they burn gas, oil, wood or coal, rely on the chimney to safely carry toxic gases produced by the heating system out of the house.
A carbon monoxide detector can warn homeowners of potential poisoning after the deadly gas has already entered the living area, but an annual chimney check can help prevent carbon monoxide from entering the home in the first place.
Each fall, homeowners shift into home-improvement mode. They clean basements, garages, and gutters, preparing homes for winter. But they usually don't inspect, repair, or even clean their chimneys, despite the potential damage to their property or even to their lives.
An annual chimney inspection by a CSIA Certified Chimney Sweep is a modest investment that can reduce the danger of chimney fires or carbon monoxide poisoning. CSIA Certified Chimney Sweeps have earned the industry's most respected credential by passing a written examination based on fire codes, clearances and standards for the construction and maintenance of chimneys and venting systems.
In fact, when chimney fires occur, many insurance investigators rely on CSIA Certified Chimney Sweeps to determine whether a fire originated in -- or damaged -- the chimney system.
CSIA, established in 1983, is a non-profit, educational institution, dedicated to educating the public about the prevention of chimney safety hazards.
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