To safely insulate your furnace exhaust, always use high-temperature caulking, do not allow insulation to touch the vent by creating a dam first, and be sure you know what kind of vent pipe you are dealing with.
Can you insulate around a furnace vent pipe?
Now that you have safely sealed the air leaks around the furnace exhaust, you can work on insulating your attic space. Warning: fiberglass insulation cannot just butt up to the vent pipe, touching it. Although fiberglass may not burn, it can melt contribute to a fire and the speed at which it spreads.
Does this heating air duct need to be insulated?
As such, this heating air duct extends into that 18" soffit area where there's a 90° boot that goes directly into the upstairs floor vent. With no insulation in that 18"x15" area between the joists, there's freezing cold air coming in -- so it clearly needs to be insulated.
Are B-vents a problem in your home?
B-Vents can Be a problem As a Seattle Home InspectorI frequently find insulation tightly packed around B-Vent pipes that run through attics. (B-vent pipes are used to vent combustion by-products from gas burning appliances such as furnaces and water heaters.)
Can you put insulation against double wall pipe that runs through Attic?
Is it safe to put insulation against double wall pipe that runs through the attic. I understand that fiberglass insulation in non combustible as long as it is not the paper-backed type.
Can you put insulation around vent pipe?
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Can you put insulation around a furnace?
Insulating the walls and ceiling in a furnace room can reduce heating costs and make the furnace more energy-efficient. Rigid foam insulation is attached to the walls with adhesive, and to the ceiling with adhesive and roofing nails.
Can you put insulation next to heat ducts?
Fiberglass insulation can touch HVAC ductwork provided the ducts are not leaking or forming too much condensation. The insulation should be snug enough to prevent significant gaps throughout the ductwork.
Can fiberglass insulation touch chimney?
Fiberglass insulation can't and should not touch your stove's vent pipe. While fiberglass is not flammable, it can melt, causing fire risks. To get around this issue, you need to install a barrier of aluminum flashing between the vent and the insulation.
How do you insulate around a furnace vent?
Now, you must form an insulation dam to prevent insulation from contacting the flue pipe. To do this: Cut enough aluminum flashing from the roll to wrap around the vent pipe, with an extra 6 inches to spare. Unwrap the flashing from the vent pipe so you can work with it.
How far do walls have to be from furnace?
30 inchesEach county or municipality establishes space requirements and safety regulations for furnace rooms. A general standard is to have at least 30 inches of space between the walls and a furnace's sides.
How hot can duct insulation get?
Once the combustion occurs and the air gets heated up, it can have a temperature between 140 F and 170 F.
Can insulation touch a dryer vent?
No. The air coming out of the dryer vent is not hot enough to ignite anything. Otherwise they would require a double walled vent pipe.
Can insulation go around dryer vent?
You can insulate your dryer vent with rolled insulation. Wrap the pipe with the rolled insulation, making sure that the entire pipe is covered. Then, secure the insulation with duct tape. After this is done, caulk around the exit of the pipe on the exterior of the home to prevent cool air from seeping in.
Can you put insulation around chimney?
Historically, people have used the term "flue" and meant the chimney itself. So, with all of this information, the answer is you shouldn't insulate around a chimney. There are better ways to keep cold air out and losing the air you pay to condition.
Will insulation catch fire?
Since the insulation is made from glass, fiberglass insulation is considered non-flammable and will not catch fire. However, the paper and foil backings can catch on fire. Fiberglass manufacturers can add flame-retardant adhesives and foils to kraft paper backings.
At what temperature does fiberglass insulation melt?
What About Fiberglass Insulation? Fiberglass insulation is not flammable. It will not melt until temperatures are over 1,000 degrees Fahrenheit (540 Celsius), and it will not readily burn or catch fire at low temperatures.
Why does my kitchen sink get hot?
When a kitchen sink is getting hot water, it usually indicates a blockage of transfer between the water heater and the faucet. But before we dive into troubleshooting this, let's clear up one...
Can you vent a stove with a double wall?
You can increase the safety of stove venting by using a double-walled vent. These come standard with many common systems but if you are retro-fitting a stove vent in an existing home, this is highly advisable and in fact required by building code in some areas.
Does fiberglass burn?
While fiberglass doesn’t burn , the same can’t be said for the foil and paper backing you’ll find on this insulation material. These will ignite if the temperatures get high enough, and you can’t bet against that happening in your stove’s vent.
Is fiberglass flammable?
Fiberglass. Made from molten glass, usually with 20% to 30% recycled industrial waste and post-consumer content. Nonflammable, except for the facing (if present). Sometimes, the manufacturer modifies the facing so that it is fire-resistant.
Is fiberglass a vapor barrier?
Some fiberglass is unfaced, some is paper-faced with a thin layer of asphalt, and some is foil-faced. Paper-faced batts are vapor retarders, not vapor barriers. Foil-faced batts are vapor barriers. The vapor barrier must face the proper direction.
Is fiberglass insulation combustible?
Also fiberglass insulation is NOT a listed non-combustible. Expand Signature. Extensive knowledge about Gas, Wood and Pellet hearth products. Specialized in the brands: Quadrafire, Heat & Glo and Heatilator.
How to keep heat in a poorly insulated house?
In a cold climate, where the need for the house is to be warm, then insulation emphasis should be on keeping heat in. In addition, in a poorly insulated house, it is easy to additionally cool by air circulation, such as creating a through breeze by opening a front & back door, or an upstairs & a downstairs window.
What is yellow duct insulation?
It is board insulation used to make the duct so that the duct doesn’t have to be insulated. The duct is made of the fiber board.
What is Flex Duct?
Flex duct, would be expected to have the interior duct pulled over the bead in any fitting and taped in place with furnace tape, the insulation would be pulled over that and the outer sleeve would be pulled over that and fastened with a Zip Tie. Then mastic or furnace tape sealed.
What is a duct made of?
The duct is made of the fiber board. Insulation within the air vents may result from poor installation, damage sustained from age, or maybe due to other factors, or maybe due to certain insects or pests.
What is the color of sound liner on ducts?
If it is loose and partially blocking the vents, it may have torn loose or the glue failed. Duct sound-liner is usually black in color, 1/2″ or 1″ thick and is glued and/or pinned to the inside of the duct as it is being fabricated.
Do you have ductwork in the attic?
Do you have ductwork in your attic. A slab on grade home, one with a crawl space, or the top floor of a multi-story home, you most likely have duct work in the attic. If you have HVAC registers in or near the ceiling, yes., As an energy auditor, my first thought would be leaks in the ductwork.
Can fiberglass insulation cause dermatitis?
It is well known that with contact, the fibers or particles will irritate the skin and eyes. Prolonged contact with fiberglass can cause irritant contact dermatitis. Also, inhaling these fibers can cause difficulty in breathing.
Is there a fire hazard in a duct?
No fire hazard there. Looks well sealed, so no fiber blowing there.#N#Just make sure you insulated the back side of the elbow so you don't permit condensation within the duct. Since you've sealed off the warm air entering that void you now have an un-insulated duct traveling through a cold space. The warm, moist air within the duct will come in contact with the cold duct wall and potentially condense. Ensuring the entire bay is filled with insulation will help to avoid this condensation.
Is a cantilevered joist under insulated?
The cantilevered joists over the exterior wall are under-insulated if that one piece of fiberglass batt (in each cavity) is blocking air movement over the wall and there is no more insulation behind them. The outside joists should be insulated with cavity insulation, and foamboard (then plywood/siding) to stop the thermal radiation to the ground outside; http://www.buildingscience.com/documents/insights/bsi-009-new-light-in-crawlspaces/
