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Home › Low slope components › Through-Wall Scupper
Through-wall scupper

Through-Wall Scupper

SSMTW
Low slope · through-wall drain
Custom order form
Custom order form & drawing Color chart Finish warranty Install guide Request a takeoff
OverviewMaterialsSizes & profileInstallationColors
Through-wall scupper through-wall roof drain
SSM through-wall scupper — drains the roof through the parapet into the collector box and down the spout
Drains through the parapet wall
Through-wall or overflow
Sized to your opening
Sealed watertight seams
Flange to fit your flashing
Pairs with our conductor heads
Steel, aluminum, or copper
29 standard colors
Through-wall scupper is our fabricated through-wall drain — it carries water off a flat or low-slope roof out through the parapet, either as a primary drain or an overflow. We build it to your opening with sealed watertight seams and a flange that fits your flashing, and it pairs cleanly with our conductor heads and downspouts — fabricated to your drawing in steel, aluminum, or copper and backed by our 5-day fabrication guarantee.

We build through-wall scuppers in steel, aluminum, or copper — stainless on request, 24 gauge only. Painted steel and aluminum come in any color on our chart, and the paint finish carries the coating manufacturer’s warranty. Copper ships bare — no paint, no finish warranty. Tell us the metal, gauge, and color and we’ll match the job.

MaterialSteel / aluminum / copper
Color chartFinish warranty
Through-wall scupper — front and side views with standard dimensions

Standard profile shown — every piece is bent to order. Send us your dimensions for a quote.

TypeThrough-wall / overflow
SeamsSealed watertight
FlangeFit to your flashing
Custom order formAll drawings

How to install a through-wall scupper: opening layout, setting and sealing the sleeve, lapping the flange into the roof flashing, and the tie-in to the collector box or downspout. It is covered in our drainage guide:

Open the box gutter & downspout guideRequest a takeoff

Available in every color on the SSM color chart — 29 standard colors plus custom finishes, color-matched to most manufacturers. Bare galvalume and galvanized are available too.

View the full color chartTry colors on a building

Systems

Metal roof systemsWall & cladding systemsExposed fastener systemsLow-slope systems

Recent news

Free touch-up paint on orders over $500August 2026New Kokomo shop now openJune 20265-day fabrication now standardMay 2026

Need a takeoff?

Send your plans and we’ll run the full metal takeoff for your scuppers — then quote it.

Request a takeoff

Want Through-wall scupper on your next job?

Tell us the opening, type, material, and color — we’ll quote it fast.

Get a free quote