Heavy-Gauge Metal for the Lowcountry48 Hours delivery.

HVAC & plumbing sheet metal for Charleston contractors

Charleston's commercial construction blends historic retrofit with port-driven industrial growth — and both demand exacting sheet metal work. SWI fabricates custom duct, heavy-gauge stainless and corrosion-resistant systems for Lowcountry contractors, delivered on scheduled routes from Charlotte.

Whether it's a King Street historic retrofit with impossible transitions or a Boeing-corridor supplier facility with heavy industrial exhaust, SWI builds it to print and delivers it on schedule.

Project experience in Charleston

Port facilities, historic commercial retrofits and the Boeing supplier network.

Areas we deliver around Charleston

• Downtown Charleston
• Mount Pleasant
• North Charleston
• Summerville
• Goose Creek
• James Island
• Daniel Island
• Hanahan
• Moncks Corner
• Isle of Palms

What we fabricate for Charleston contractors

Every order headed to a Charleston jobsite is fabricated at SWI's Charlotte shop to the same SMACNA standards our contractors have trusted since 1966 — then labeled by job, floor and system before it ever leaves the dock. Our Charleston customers order the full commercial package:

• Rectangular Ductwork

  SMACNA-compliant rectangular duct fabricated on automated coil lines. TDF/TDC flanged connections, 26–20 gauge galvanized, lined or unlined, sealed to SMACNA Seal Class A.

• Spiral Pipe & Fittings

  Spiral lock-seam round and flat-oval pipe with matching elbows, tees, reducers and taps. Gored, stamped or radiused fittings to spec for exposed architectural ceilings.

• Black Iron & Grease Duct

  Heavy-gauge welded black iron duct for kitchen exhaust, industrial exhaust and smoke control. Continuous welded seams, NFPA 96 compliant for commercial kitchen grease duct.

• Drain Pans & Plumbing Metal

  Custom condensate drain pans, water heater pans and plumbing sheet metal built to your dimensions. Soldered or welded corners, PVC or threaded drain connections.

• Roof Curbs & Flashing

  Equipment roof curbs, curb adapters, pitch pockets and counter flashing fabricated to RTU submittals. Fully welded and reinforced for carrier and package units.

• Custom Fittings & Specialty

  Transitions, offsets, elbows, boots, collars, wyes and one-off specialty sheet metal. Send a sketch or a CAD file — our shop builds it to the print, labeled by job and floor.

Contractors across Charleston and greater South Carolina choose SWI because the estimate comes back within one business day, the metal arrives within 48 hours, and the driver already knows the route. Whether your project calls for standard rectangular duct or a one-off stainless transition, send your prints today and put 60 years of fabrication experience on your next Charleston job.

Frequently asked questions