FIT GETS DECIDED ON PAPER BEFORE IT GETS DECIDED ON SITE

Field Measurement, Fit, and Installation for Custom Sheet Metal

Getting Custom Metal to Fit the Site the First Time

Only have a tape measure, a photo, and an opening no drawing shows?

A fitting is only as good as the measurements it's built from. These guides show you how to measure, what to tell us about the site, and who's responsible if a part doesn't fit.

Numbers first, metal second.

8 min read

Start Here With How to Measure Ductwork for a Custom Fitting →

The guide shows you the three measurements to take and how to label each one. It also covers what a curb adapter needs from both units, and when it's better to have us measure on site.

More Ways to Get the Fit Right

Once the numbers are right, scope, site access, and responsibility decide whether the part goes up on the day you planned.

If your measurements are ready, send them with your photos or sketch and we'll say what's still missing. For standard ductwork and fittings, WebDuct prices them instantly once your company has an account.

Sending a complete request has its own guides in Quote-Ready Resources, and the import question lives in Local Fabrication vs Imported Parts. The rest of the library is in the Spec Room.

Sign UpCreate your Duct Duct Goose portal account

Loading the sign-up form…

⚠️Disclaimer!

At Duct Duct Goose, we specialize in sheet metal fabrication and stainless steel services for commercial and industrial applications, including HVAC systems, ducts, and custom metalwork. Please note that we do not offer services for automotive-related projects, such as vehicle parts, repairs, or modifications.