The Multi-Flue Cap
A multi-flue chimney cap covers the entire chimney crown in one piece — one cap over all your flue tiles, regardless of how many you have or how they're arranged. If your chimney has two or more flue tiles, this is the correct cap. I fabricate every multi-flue cap to your exact chimney dimensions from 18×18 up to 60×120, in my shop in Berlin, NJ.
Every cap is hand-fabricated to your exact dimensions — the same way it's been done in my shop since 1994.
What It Actually Does
A properly fitted cap does four things a hardware store cover doesn't: it protects the entire chimney crown (not just individual flue tile openings), it blocks animal entry with a heavy spark screen, it reduces wind-driven downdraft, and it contains embers from wood-burning fireplaces. The full-perimeter flange sits on the crown — crown repair runs $500–$3,000, and a cap that covers it correctly prevents all of it.
What is a chimney crown — and why yours may already be cracking →
Built for Multiple Flues
The multi-flue cap uses a taller screen panel than a standard single-flue cap — 10" is the default, with options up to 24" — to clear multiple flue tiles that may sit at different heights above the crown. One cap, one installation, full coverage. The cross-brake lid sits on top and removes without tools for chimney sweeping or flue access.
Measure the full outside of your chimney at the crown — not individual flue tiles — and enter that single width and length in the calculator above. That's your cap size.
Cross-Brake Removable Lid
Every multi-flue cap includes a cross-brake structural lid standard — a single-piece lid with a built-in cross-brace for rigidity across the full span. On a multi-flue cap, the lid can be substantial — some span 4, 5, even 8 feet across — and the cross-brake keeps it flat and rigid under its own weight and under snow load. Locks down in place when installed and removes without tools for chimney sweeping or flue access. Standard on all materials and all sizes.
Material Options
16oz Copper — warm penny tone new, weathering through rich browns and eventually to the classic verdigris seen on historic buildings. No paint, no coating, no maintenance. The patina that develops is protection — not deterioration. Riveted construction with copper rivets and solid brass mandrels.
Copper vs. aluminum chimney caps — which is right for your home? →
Kynar-Coated Aluminum — factory-applied PVDF coating, the same system used on commercial standing-seam roofing. Holds color without fading, chalking, or peeling for 25–50 years. Available in a wide range of architectural colors including black, charcoal, dark bronze, and more. Riveted with stainless steel color-match rivets.
304 Stainless Steel — 2B 304 24-gauge. Doesn't corrode, doesn't need coating, handles coastal salt air and harsh environments without issue. The performance choice when long-term durability matters more than aesthetics — 50–100+ year lifespan with zero maintenance.
Galvalume Plus — zinc-aluminum alloy coating over steel. Strong corrosion resistance at an accessible price point. Mill-finish appearance. Good for straightforward applications where color isn't the priority.
Galvalume vs. aluminum vs. stainless steel — how they compare →
Specs
- Material: 16oz copper · Kynar aluminum (.032") · 304 stainless steel (24 gauge) · Galvalume Plus (24 gauge)
- Spark screen: expanded stainless steel mesh (copper/SS) · aluminum mesh (Kynar/Galvalume)
- Lid: cross-brake removable lid, all sizes
- Minimum size: 18" × 18"
- Maximum size: 60" × 120"
- Screen height: 10" standard · 12"–24" available
- Mounting: Side-mount or top-mount flange
- Drip edge height: 2" to 4½" · 3" standard
- Lead time: Approximately 3–4 weeks
- Ships: Nationwide via insured LTL freight in custom wood crate
Installation
Two mounting options. Side-mount wraps a vertical drip edge around the outside of the chimney crown — full crown coverage, tighter seal against wind-driven rain, more permanent attachment. Top-mount flange places a flat flange on top of the crown surface — better choice when there's no vertical face to wrap.
Top mount vs. side mount — which one do you need? →
Not sure how to measure? Step-by-step chimney measuring guide with free PDF worksheet →
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 → | Browse custom chimney chase covers →
Shipping
Large caps ship via LTL freight in a custom-built, heat-treated wood crate, fully insured. I need your exact chimney dimensions, delivery address type (residential or commercial), and zip code before you order. Call or text (609) 352-9840 to get a freight quote before purchasing.
LTL freight means your order arrives on a full-size tractor-trailer with liftgate service — curbside delivery to the back of the truck. If your property can't accommodate a large truck or you need the crate moved beyond the curb, delivery add-ons and terminal pickup are available.
About Archaic Metal
I've been fabricating custom architectural sheet metal in South Jersey since 1994 — copper, Kynar aluminum, Galvalume, and stainless steel, all by hand. Every cap that leaves this shop I built myself. If you have questions about your chimney or which cap is right for it, message me or call. I personally review every order before fabrication starts — you won't be left guessing.
Phone: (609) 352-9840
Not sure what size you need or how many flues to cover?
Send me your measurements and I'll confirm everything before fabrication starts. No obligation.
Request a quote or call/text me directly: (609) 352-9840
What Customers Are Saying
"Fantastic fit and finish, excellent communication from start to finish. A trusted craftsman." — Charlie
"The chimney cap is absolutely gorgeous. The craftsmanship is incredible. I am beyond thrilled." — Carol
"Amazing quality. The custom chimney cap exceeded my expectations!!" — Johnny