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    Chimney Caps & Chimney Covers

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    22 Questions & 22 Answers
    from Brea, Ca. asked:
    August 15, 2018
    I need a chimney cap to fit over a flu size of 17 3/4'' x 10''. The flu rises above the mortar approximately 1 1/4''. Color black would be fine.
    1 Answer
    Based on your dimensions, I would suggest the HomeSaver Pro 10 in. x 17 in. Base California Mesh Black Galvanized Steel Single-Flue Chimney Cap, which has adjustable screws that would allow the cap to accommodate a flue size of 10" x 18".
    Brennan W.
    on August 15, 2018

    Heath Brown
    from Madisonville, TX asked:
    February 11, 2018
    I am needing a chimney cap in either black or silver. The actual opening to the chimney is 11 1/2 x 17" and the outside of the chimney is 17 1/2" x 23". I either need a chimney cap that is larger than the opening and mounts on the surface, or a cap that attaches to the outside of the chimney. I would appreciate any help that you can give me.
    1 Answer
    We have them both ways. Either a surface/crown mount or a band around/outside mount. The crown mounted ones are generally lower in cost. The come in either painted, stain less or copper. As well the mesh height and lid overhang can be various sizes or standard.
    Owen O.
    on February 12, 2018

    from scurry, tx asked:
    January 25, 2018
    what is the best material for my wood burning stove's cap? aluminum? copper? gal. steel?
    1 Answer
    In short, the tested and listed chimney cap for your manufactured chimney system will be the only cap you should use. If this is no longer available, we do offer some universal caps, but these will all be stainless steel. That is, unless you have a masonry chimney and the stovepipe run does not transition to stainless steel corrugated flexible chimney liner. If this is the case, you would have several options for mounting to a terracotta flue. As far as the best cap material to use, stainless steel will typically be the best option. A copper cap would also provide excellent durability, but this option is typically only chosen by customers for aesthetics and can be quite pricey. The galvanized option is normally painted black to prevent corrosion and will be the least durable option between the three.
    Will M.
    on January 26, 2018

    Pamela L
    from Bedford, TX asked:
    January 8, 2018
    I need a chimney cap. How do I measure, the opening or measure around the outside of the bricks? Which style would be best for keeping birds out?
    1 Answer
    If this is indeed a masonry chimney and you are looking to simply keep birds out, I'd recommend considering a cap like the Multi-Flue Semi-Custom Gelco Chimney Cap - 8" High Mesh. For this cap, you would measure the outside perimeter of your chimney crown and choose a width and length just shy of this measurement, ensuring there is adequate space between the outside perimeter of the crown and your flue tile(s). You will also need to know how far the flue tiles extend from the crown surface in order to make sure the cap lid will be at least 5" above them, if you choose this cap. If you are looking for a different style cap, please use the cap calculator at the top of the page here. If this is the case, the measurements you would need to take would be predicated by the cap style, meaning that you would take different measurements for a surface mount cap than you would for an outside mount cap.
    Will M.
    on January 9, 2018

    from hickory, nc asked:
    December 18, 2017
    on the surface mount caps how wide or deep is the mounting flange. all measurements are shown outside of screen.
    1 Answer
    Just over 1"
    on December 19, 2017

    Eric O
    from Lewistown, MO asked:
    December 15, 2017
    We had our chimney inspected and the guy suggested we get a new cap. The flue sticks up about a quarter of an inch so he recommended one that slips in. The inside measures 11 1/4 x 11 1/4....tight. Any ideas?
    1 Answer
    on December 18, 2017

    from Thomaston, ME asked:
    December 4, 2017
    How does the multi-flue Gelco chimney cap attach to the chimney?
    1 Answer
    It attaches to the crown with TapCons and adhesive.
    on December 5, 2017

    Hal D
    from Arizona asked:
    December 2, 2017
    I have a old fireplace that has a clay flue, it extends about 1 inch above the masonry and it has no rain cap, I have been having a hard time finding one, hopefully you can help me find one. The flue is oblong and made of clay, I would like to clamp onto it, the outside measurements are 20 7/8" X 17" the inside measurements are 18 5/8" X 15" please let me know if you can help. Thank you.
    1 Answer

    from Trcukee, CA asked:
    October 10, 2017
    My house is 40 years old; is there a standard width chimney cap?
    1 Answer
    There is no standard chimney cap. With masonry fireplaces, the construction is very much subject to builder discretion and the flue measurements will subsequently vary widely. With manufactured fireplaces, the chimney and chimney cap will be very specific to the fireplace.
    Will M.
    on October 10, 2017

    from MI asked:
    August 12, 2017
    Is it okay to overlap the pre-existing mesh with more protective covering in my situation? I'm having a hard time with bats entering my house. Everything is sealed except my chimney cap has 3/4 mesh. It is a natural gas set up.
    1 Answer
    We would not recommend overlapping the pre-existing mesh as this could result in too little air space available for the exhaust fumes to escape from your chimney. If you have a pre-fabricated chimney, we would suggest a louvered top replacement or changing to a cap with 5/8" mesh.
    Kelsey C.
    on August 14, 2017

    from Lewisville, TX asked:
    July 24, 2017
    I am not entirely sure how I need to measure for the chimney cap. I have a rough estimate of 40' x 11' for the internal flute, which is flush with the chimney itself. Do I measure the inside or the entire chimney?
    1 Answer
    It would depend on how you would like the cap to mount. On a flue mounted cap, we would need the ID and OD of the flue itself.
    on July 25, 2017

    from Pittsburgh, PA asked:
    May 12, 2017
    I have a wood burning fireplace and when temperature warms up outside or it rains, smell comes through wood burner. Do you make a chimney cap that spins and stops the air being pulled down?
    1 Answer
    There would not really be a cap design that would correct this issue with any assurance as the problems you are describing are the result of negative pressure. In the warmer months when customers turn on their home's HVAC for cooling, the fireplace's chimney will tend to draw in outside air as the return vent will pull floor level air up through the home's ventilation and push cool air out of the cooling registers near the ceiling. Since the pressure is not equalized, the force of a motorized blower fan will easily pull air down through the chimney, so I would recommend cracking a window to see if this is still happening once makeup air is being pulled from another location. If not, I recommend making sure the damper is in the fully closed position. If it is, consider installing doors to additionally restrict the amount of air that can be pulled through the fireplace opening. To address the downdraft when it rains outside, these two things could be related to the subsequent wind that comes along with rain and the chimney not being tall enough to prevent downdraft. In order to correct this, please ensure the chimney is at least 3' above the roof and then an additional 2' over any obstruction measured within 10' horizontally from this point.
    Will M.
    on May 15, 2017

    Beth Burkette
    from Denham Springs, LA asked:
    November 27, 2016
    Where would I find a chimney cap screen?
    1 Answer
    Unfortunately, we do not carry screens for chimney caps.
    Brennan W.
    on November 28, 2016

    from Sacramento, CA asked:
    November 16, 2016
    I own several residences at South Lake Tahoe, California, which have custom fireplaces; all clean, but require chimney caps for new fire protection codes. How do I know which height: 8, 10, 12 inches high?
    1 Answer
    The height will depend on how high the clay flue sticks up from your chimney. The cap will need to be a minimum of 5" above the clay flue.
    Brennan W.
    on November 16, 2016

    Martin Luchak
    from Wiemar, Texas asked:
    November 15, 2016
    I have a 100+ year Catholic Church with a brick chimney. The outside dimension are 47" x 47", inside dimension 20"x 20". The boiler in the basement is exhausting into a 12" pipe into the chimney. I would like it to be side mounted and material to be 22 gauge copper with copper screen 8" tall.
    1 Answer
    While the gauge of copper will be 18 for the screen and 24 for the lid, we are able to have these caps custom-made. To ensure we are making the correct recommendation, please provide clarity for what you are referring to when stating you prefer a side mounted cap. We offer caps that mount to the crown surface (top mount), the flue tile extending from the crown (modified single flue), around the perimeter of the top crown surface (outside mount) or wrap around the crown surface itself (band-around).
    Will M.
    on November 15, 2016

    Ron Brushaber
    from CT asked:
    November 7, 2016
    Would you have a chimney cap that is 10 inch high, with 3/4 mesh; 36" by 24"
    1 Answer
    The Multi-Flue Semi-Custom Gelco Chimney Cap - 10" High Mesh with these dimensions would appear to be exactly what you are looking for.
    Will M.
    on November 8, 2016

    from Los Angeles, CA asked:
    September 8, 2015
    My chimney measures 21 1/2 x 21 and does not seem to have a flue. There is an oval hole down the center of the chimney which is about 9 1/2" x 11". There is now flue or lip protruding above the mortar at the top of the chimney. The mortar is sloped or angled and rises about 3" above the bricks. What sort and size of chimney caps should I consider?
    1 Answer
    Brennan W.
    on September 9, 2015

    from Stuart, VA asked:
    July 1, 2015
    How far above the top of the flu do these chimney cap covers need to be?
    1 Answer
    When selecting a chimney cap, you will need to ensure the mesh height or lid will be at least 5" taller than the highest flue tile that extends from your crown. Typically, the terracotta flue should extend 2" above the crown, splay or wash, however, the flue tile can sometimes be level with this surface or extend much higher than 2". We have caps on our site that can accommodate this issue and we also have a custom fabrication department that can make a cap to your needs, with the proper information provided.
    Will M.
    on July 2, 2015

    from Long Valley, NJ asked:
    September 8, 2014
    Is there a minimum distance from the top of the flu to the underside of the top of the cap?
    1 Answer
    The minimum required gap between the top of a clay flue tile and the underside of the cap lid is five inches. Keep in mind that this is a minimum and an inch or two of extra space will help to improve draft further, especially on shorter chimneys.
    on September 9, 2014

    from Durand, MI asked:
    October 7, 2013
    For a multi-cap chimney, would I need to measure the length, width, and height of flues?
    1 Answer
    Precisely. The outside dimensions of the flues, as well as their projection above the chimney wash would need to be known. Any offset from one flue to the other will also need to be noted.
    Collin C. - NFI Master Hearth Professional
    on October 8, 2013

    from OK asked:
    July 27, 2013
    How can I keep water from going down my chimney?
    1 Answer
    Generally, the best way to stop this from happening is to use a chimney cap that is oversized to the chimney opening.
    Collin C. - NFI Master Hearth Professional
    on July 29, 2013

    Dave L
    from Cerritos, CA asked:
    February 24, 2013
    Do they make a chimney cap with mesh small enough to keep the bees out?
    1 Answer
    For instances when small insects are a nuisance, I recommend wrapping the factory chimney mesh with a smaller gauge stainless steel wire mesh. So as not to impede draft, I do not recommend going smaller than 1/8 of an inch.
    Collin C. - NFI Master Hearth Professional
    on February 25, 2013

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