Custom Cupolas & Chimney Shrouds: Fabrication for Builders
The rooftop metalwork that finishes a building — and how to spec and order it so it fits the roof it lands on.
A cupola or a chimney shroud is the piece everyone looks at and almost nobody specs correctly. It sits at the highest, most visible point of the building, it has to shed water and shrug off wind, and—because it’s custom—there’s no stock part number to fall back on when the dimensions are wrong. This guide is written for builders, GCs and roofing crews who want their rooftop metalwork fabricated to fit the specific roof and chimney it’s going on, rather than ordered off a catalog and shimmed into place. Get the base and the pitch right up front and these pieces install clean; get them wrong and they fight you on the ridge in the wind.
Cupola vs. chimney shroud: two different jobs
They read as similar — formed metal boxes with a roof on top — but they solve different problems:
- Cupola: a decorative (and sometimes ventilating) structure that sits on the ridge or a roof plane. It’s an architectural accent — often louvered on the sides, capped with a small metal roof, and topped with a finial. Function is mostly aesthetic and, when louvered, some passive attic airflow.
- Chimney shroud (or chase cover crown): a functional metal cap that covers a masonry chimney or a framed chase. It keeps rain, snow and animals out of the flue while letting exhaust escape, and it dresses up an otherwise plain chase top. Function comes first here — drainage and clearance around the flue are non-negotiable.
The detail that decides fit: for a cupola it’s the roof pitch — the base has to be cut to sit flush on your slope. For a shroud it’s the chase or chimney footprint plus flue location — the cover has to overhang correctly and clear the flue. Send those numbers and the piece lands right; guess at them and it rocks or leaks.
Why custom beats a stock unit
Prefab cupolas come in fixed base widths and a single generic pitch cut; prefab chimney caps come in a handful of stock rectangles. Real roofs and real chimneys rarely match either. A custom-fabricated piece lets you size the base to your actual chimney or the proportion you want on the ridge, cut the base angle to your exact roof pitch so it seats without a gap, match the panel profile and finish so the metalwork reads as part of the roof, and detail the drainage and overhang so water is thrown clear instead of tracking back onto the chase. On material and gauge the same rules apply as the rest of the roof — our metal gauge guide covers where to step up for a wind-exposed rooftop piece, and the aluminum vs. steel guide helps you pick the substrate for the exposure.
How to spec a cupola
A cupola is quotable once we know its size, its top, and how it meets your roof. Give us the base dimensions (square or rectangular footprint), the overall height you want, and—critically—the roof pitch it will sit on so we can cut the base to seat flush. Tell us whether the sides are louvered or solid, the roof style for the cap (hip, pyramid or a small standing-seam), and whether you want a finial on top. Finish and color should match or intentionally contrast your roof panel. If it’s replacing an existing cupola, a photo next to a tape measure gets us most of the way there.
How to spec a chimney shroud or chase cover
For a shroud, function drives the drawing. Send the outside dimensions of the chimney or chase at the top, the flue size and its position on the top (offset flues are common — we need to know where it sits), and the height and overhang you want on the cover. A chase cover should be formed with a slope or a cross-break so water drains rather than ponds, a drip edge so runoff is thrown clear of the chase, and the correct clearance and collar around the flue. Note the material and finish, and tell us if the top needs to be screened. Our guide to spec’ing custom trim & flashing covers turning a field measurement into a clean fabrication drawing.
Lead time, quantities and getting it to the jobsite
These are three-dimensional assemblies, not flat trim, so lead time depends on the complexity of the piece, the finish and how many you need — a single custom cupola runs differently than a run of matching chase covers for a subdivision. Tell us the quantity, whether the pieces are identical or each unique, and your need-by date up front; we’ll tell you straight whether that date is workable rather than promise it and miss. Larger cupolas may ship partially knocked-down for freight and assemble on site — we’ll flag that when it applies so your crew knows what shows up on the truck.
Quick pre-send checklist
- Cupola: base footprint, overall height, and the roof pitch it seats on.
- Cupola: louvered or solid sides, cap roof style, and finial yes/no.
- Shroud/chase cover: chase or chimney top dimensions, flue size and position, and desired overhang.
- Shroud/chase cover: slope/cross-break for drainage and whether the top is screened.
- Material — steel with gauge, or aluminum/copper with thickness.
- Finish and color, matched to your roof, plus quantity and need-by date.
Made in Ogden and shipped nationwide, we fabricate custom cupolas, chimney shrouds and chase covers to fit the roof and chimney they’re going on — cut to your pitch, sized to your chase, and finished to match your panels. Send your dimensions and a photo of the roof, and we’ll price it fast, flag anything that won’t seat right, and build it to install clean the first time.
Have a cupola or chase cover to price?
Send your pitch, chase dimensions and finish — we’ll fabricate rooftop metalwork that seats flush and sheds water.