Chase Tops for Pre-Fab Chimneys

Chase Top 1Do you have rust running down the side of your chimney and wonder where it’s coming from?

chase top 2Over the years, the metal covers on most pre-fab chimneys start to rust due to moisture (rain, ice and snow) that sits on the metal for extended periods. Along the way, pine straw and leaves land on top as well. When this material starts to decay, it creates a very acidic condition that eats the galvanized coating off the metal.

chase top 3It can take as little as 5 years of this condition before you see rust running down the side of your chimney. Eventually, the metal starts to pit (rust through) allowing water to drip inside the chimney structure. You may hear the dripping sounds sometimes when it’s quiet in the home, after a rain. When you see the rust stains, it is time to replace the top SOON.  That’s where we come in…

chase top 4Most chase tops are improperly installed from the start. They are made from thin, galvanized sheet metal with no supports installed under the cover to hold up the large cap. This creates an instant pool for water and debris to fall in, starting the rusting  process at the first rain. Some covers have nail holes in the chase cover that eventfully start to leak when the old caulking gets hard and cracks.

We can replace the chase cover using stainless steel or KolorKlad instead of the regular galvanized metal that will rust in time. When installing the new chase top, we only drill holes for screws in the side flange not on top.  We drill 2-3 holes in each long side flange about 18 inches from each end and install stainless steel screws to hold the cover in place. The tops have cross breaking to create a dome effect, preventing water from standing on the top. The existing cap is cleaned and painted to look like new. We use a special glue to hold down the cap – not screws like before – preventing another water leak source. Overall, this is a better system for a reasonable price. Plus stainless steel chase covers have a lifetime warranty, and KolorKlad tops have a 25-year warranty.

chase_top18Rusted chase top with gas furnace flue chase_top19New cover and painted caps to make look new
chase_top_old1Old rusted chase cover with 2 flues chase_top_new1New black KolorKlad top with painted caps

The material we recommend to replace chase tops is ColorClad. It has a 25-year product warranty and comes in a number of different colors with a very durable finish. The most basic are Black, White, Sand, Bronze, Red, Green, etc. We can get close to most trim colors or, if you want to be different, go with a different, complimentary. ColorClad is made from the same material that metal roofs are made out of, and this material is much more cost-effective than stainless steel.

We also recommend Stainless steel — it’s a more durable material for use outdoors. The metal is stronger and, over a long period, looks like new. As you know with your kitchen sink, stainless will not rust.

Give us a call today,  and we will come by to take a look at your chimney and give you a price on replacing the old rusted top  with a new model.  We can also give you a price on regular galvanized and paint grip coating if you want a cheap fix (no warranty on these options).


Chase cover replacements start at around $725.00 for galvanized, $850.00-$985.00 for ColorClad and $1,100.00 for stainless steel. Actual pricing depends on size, material requested, and height of chimney. Most customers opt for ColorClad, and every so often we are asked to make a copper one. 🙂

Prices for copper are highest, with stainless next, then ColorClad – a good buy, and galvanized is the lowest cost with the lower-quality metal.

Stainless steel and copper chase covers have a lifetime warranty against rust, corrosion and defects. ColorClad chase covers carry a 25-year warranty against rust, corrosion and defects (we recommend this one most often). Galvanized has a one-year warranty against rust and defects only.

All tops come with a one-year workmanship warranty on the installation of product.

Hope this helps. For more info or to schedule for replacement call us at 919-772-8110.

For the do-it-yourselfers, download the worksheet “How to measure for Chase Top”.


  • Passing the Hat


    Karen and Carl Newton


    Sarah and Will Gilfillan

    Owning and operating Chimney Keepers for 27 years has been a very rewarding experience, and we have enjoyed the relationships we have built with our customers. We are now starting a new chapter and are selling the business to one of our Technicians. Though we will miss the many relationships and friendships we have built over the years, Karen and I are looking forward to traveling full time in our Airstream as we explore the nooks and crannies of North America.

    We would like to take this opportunity to introduce you to Will and Sarah Gilfillan, who will be taking over Chimney Keepers as of March 30, 2020. Rest assured, Will has been well trained (by Carl!) and is very competent, with nearly four years of experience in the gas log/fireplace/ chimney service industry and over ten years as a firefighter. Sarah, the Office Manager/wife is a fast learner, and will do wonders in assisting you with scheduling appointments and answering questions. It was important to us to find a good fit for our customers, and we feel confident that you will find Will and Sarah to be knowledgeable and a pleasure to work with.

    Thank you for your business over the years. It was my distinct pleasure to have been of service to you, and I wish you continued success and prosperity in the years to come.

    Sincerely, Karen and Carl Newton

  • Is Your Wood-burning or Gas-burning Fireplaces ready for Winter?

    Is your Fireplace or Gas Log unit ready to go? If not, or for a service, give us a call.

    During a power outage, a fireplace or gas log unit may be your only form of heat, so make sure they are working in top form. Give us a call to set up an appointment, 919-772-8110.

    PS: If you do NOT have a Carbon Monoxide detector and you have gas logs, GET ONE… NOW… We recommend the combination CO/Smoke, battery-powered, detectors found at Lowe’s, Home Depot, or most hardware stores.

    If yours are over 10 years old, replace them (there’s a date on back). If there is not a date of manufacture on the back, GET rid of it.

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