5 min read · Ductwork & Fabrication
Standard ductwork exists for a reason. When the space is simple, the routing is clear, and the dimensions match standard sizes, off-the-shelf sections install fast and cost less. But most commercial buildings are not simple, and forcing standard duct into a tight, complicated space creates leaks, pressure drops, and callbacks. Here's how to think about the decision.
What Off-the-Shelf Ductwork Is Good For
Standard round, rectangular, and oval duct sections work well in open, unconstrained spaces — new construction with clear floor-to-ceiling height, simple layouts, and no interfering structure. Standard fittings and sheet-metal components are manufactured to gauge, available quickly, and fast to install. For straightforward trunk-and-branch systems in warehouse or simple commercial spaces, they are often the right answer.
When Custom Fabrication Is the Right Call
When the routing is complex, the dimensions are non-standard, or the space has existing structure and systems that ductwork has to work around, custom fabrication is not a luxury — it is what makes the install work. Field-measuring and shop-fabricating to the actual building condition means each section fits right and seals properly. It eliminates the multiple round trips of cutting and fitting that add labor time and leave leaks in the system. In occupied spaces especially, a clean first-time fit matters.
The Sheet Metal License Difference
Norkum holds a master sheet metal license in Massachusetts. That matters because not every contractor who installs ductwork is equipped to fabricate it correctly. A master license means our team has demonstrated competency in layout, fabrication, and installation to a state standard. When you get custom duct from us, it's built by people who know how it's supposed to work — not assembled from loose approximations.
Duct Leakage: The Hidden Cost of a Poor Fit
Poorly fitted ductwork leaks. Leakage past improper joints means you are conditioning air that never reaches the occupied zone — energy waste and system performance problems that compound over time. In healthcare, lab, and food-service applications, leakage also has code and contamination implications. Custom fabrication that fits tight and seals properly is cheaper than repeated service calls chasing comfort complaints caused by a leaky duct system.
Retrofits and Modifications
Existing buildings are especially likely to need custom work. When an existing system needs to be rerouted, extended, or modified to accommodate a tenant improvement or a new piece of equipment, the field condition almost never matches a standard size. We field-measure, fabricate in-shop, and install sections that fit the real building — not the idealized version. That approach avoids the field rework that drives up change-order costs.
Frequently asked questions
How long does custom ductwork fabrication take?
Lead time depends on the scope. Simple modifications can often be turned around quickly. Larger projects with complex geometry need field measurement, shop time, and finish work before delivery. We'll give you a realistic timeline when we see the scope.
Do you fabricate and install, or just one or the other?
Both — we lay out, fabricate in-shop, and install. Keeping fabrication and installation under one roof eliminates the coordination problems that come from splitting the two.
What areas do you cover for ductwork work?
The North Shore and Greater Boston. Our shop is in Saugus, MA. We handle projects from Boston to the North Shore communities.
