About mantis mfg

We approach every project with the intent of solving problems and providing innovative solutions. We believe the best results are reached through a trusting relationship, partnering with our customers to meet their design, fabrication, and installation needs.​

Mantis Mfg Inc. is an Architectural sheet metal shop located in Lake Stevens, Wa. The core of Mantis Mfg has been involved with the sheet metal trade since 1980. The inception of business began in 1988 with the starting of Northwest Sheet Metal, which evolved into Mantis Mfg Inc. in 2007. Over the course of this time we have successfully started and completed over 40 million dollars’ worth of sheet metal jobs in the Puget Sound Region. 

Our fabrication shop and skilled craftsmen allow us to provide fabrication of simple to custom complex Work. This accompanied with various relationships built over the years with other fabricators allows Mantis Mfg to be a one stop shop. 

At Mantis Mfg we specialize in custom metal work of different kinds, whatever the customer is asking for. This could be a radiused  stainless steel interior wall with a pattern finish, custom copper leader heads ,d/s,  bay window, radiused gable trim, roof crickets,  internal stainless gutter fully soldered, sheet metal roofing / siding, window and door pans, composite wall panels, custom blackened steel interior work, roof coping, flashings, copper gutter: half round, “K” style, or brake shapes. Mantis Mfg is your complete architectural sheet metal solution.