About
TJ Mechanical

Founded in 2017 by Tom McWhinnie, TJ Mechanical is a Laconia-based sheet metal company proudly serving all of New Hampshire, southern Maine, and parts of Vermont. With 15 years of HVAC service experience, Tom created a specialized niche focused solely on high-quality sheet metal installation for commercial, residential, and new construction projects. Whether managing a full job or providing skilled labor support, TJ Mechanical brings expertise and reliability to every site. Through its in-house shop, TJ Custom Sheetmetals offers custom ductwork and fittings with minimal lead times, built to exact specs using snap lock, Pittsburgh seams, and more.