The Louvered Chimney Cap is a hand-fabricated custom cap built with horizontal fin panels on all four sides. Each fin is brake-formed from the same sheet metal as the cap body — no separate extrusions, no plastic, no painted steel clips. The result is a cap that vents freely, sheds rain, and looks like it belongs on the chimney rather than bolted on as an afterthought.
I build every cap to your exact chimney dimensions from my shop in Berlin, NJ. Standard sizes and off-the-shelf boxes don't enter into it.
Also called a chimney topper, chimney rain cap, chimney cover, chimney shroud, or chimney surround — whatever you call it, this one is built to last.
Unlike store-bought caps that sit on the clay flue tile, this cap covers the entire chimney crown — protecting the masonry itself from water infiltration, freeze-thaw damage, and the creosote acid that eats mortar. Crown repair runs $500–$3,000. A full rebuild runs $10,000–$20,000. A cap that covers the crown correctly prevents all of it.
Top Mount Cap Measuring — Add 6" to the length and width of where you want the screen to sit on the chimney top. Top Mount vs Side Mount Guide →
Available in copper, stainless steel chimney cap, Kynar aluminum, and Galvalume. Stainless steel chimney caps and stainless chimney covers are built to the same spec and dimensions as every other material — contact me to order.
What It Does
The louvered panels cover the full perimeter of the cap while allowing air to move freely through the fin gaps. Rain hits the angled fins and sheds outward rather than dropping straight down into the flue. The closed top lid with stainless steel mesh keeps birds and debris out while the fins handle ventilation on the sides. For decorative or gas-insert chimneys that don't need a lid, the open-top option removes the lid and screen entirely.
Louvered Fin Construction
The fins run horizontally around all four sides of the cap body. Standard configuration is 4 fins per side. Additional fins — up to 8 per side — increase ventilation area and visual density for taller chimney openings. Each fin is formed from the same-gauge sheet as the rest of the cap: 16 oz copper, .032 Kynar aluminum, 24-gauge Galvalume, or 24-gauge stainless steel.
Kynar caps with fins above the standard 4 include a color adder per extra fin — the Kynar aluminum coating is applied to each fin at the coil level before fabrication, so every additional fin carries a proportional material cost.
The fascia rail frames the top of the louver section. Corner pieces are mitered. The premium top-mount flange wraps the base of the cap and sets on the chimney crown — 8" rip, 1" exposed face, mitered corners.
Specs
- Cap styles: Louvered (LV) — horizontal fin panels, 4 sides
- Standard fins: 4 per side (upgradeable to 5–8)
- Drip edge height: 2" – 5" (3" standard)
- Flange: Premium top-mount, 8" rip, 1" face, mitered
- Lid: Removable with stainless steel mesh screen (or open-top)
- Size range: 18" × 18" minimum · 60" × 120" maximum
- Materials: Copper · Kynar Aluminum · Galvalume · Stainless Steel
- Fasteners: Stainless steel rivets throughout
- Made in: Berlin, NJ
Have a Wood-Framed Chase?
If your chimney sits on a prefab wood-framed chase rather than masonry, you may need a chase cover in addition to this cap. The cap mounts on top of the chase cover — it doesn't have a flat bottom with pre-cut holes for your flue pipe(s). If there's currently no metal cover on your chase top, you need both.
Masonry chimney or wood-framed chase — how to tell the difference → | Not sure if a louvered style is right for your chase? Call or text Sean: (609) 352-9840.
About Archaic Metal
I'm Sean. I've been working copper and sheet metal since 1994, trained under master coppersmith Stephen L. Foss at Ye Olde Tin Shop in Haddonfield, NJ. Archaic Metal has been my operation since 2011 — one person, one shop in Berlin, NJ. Every cap I sell is one I fabricated. No outsourcing, no overseas production, no batch runs sitting on a shelf. Your cap is built to your dimensions after you order it.
More on how I build caps: How Chimney Caps Are Made · Copper vs. Aluminum
Built to your chimney. Every louvered cap is custom fabricated in Berlin, NJ. Enter your dimensions above to see your price — or call / text (609) 352-9840 for a freight quote to your door.