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Concentric Fabrication LLC describes itself on its website as a custom architectural and sculpture metal firm co-founded by Rob Lorenson and Derek Riley in 2012. On its Houzz profile, the company says it designs, builds, finishes and installs architectural and sculptural metals. In 2015, a Houzz reviewer wrote that Derek and Rob were fun to work with and open to new ideas, and recommended them for architectural or sculptural projects. A 2022 Google reviewer said these people could do anything with metal. Its Massachusetts home improvement contractor registration, number 181656, is expired on the state registry.
“Decorative Steel.- Concentric Fabrication LLC - Rob Lorenson.”
“Concentric Fabrication : Furniture Workshop.”
“decorative steel: concentric fabrication llc – rob lorenson – tresfort metal works – pierre tresfort”
These people can do ANYTHING with metal. Professional, intelligent, diverse and mad skills. True artisans.
Derek and Rob of Concentric Fabrication are fantastic to work with. Besides a supreme level of craftsmanship and skill they are amicable to new ideas and stretching possibilities. Always fun to work with and great guys in general. We highly recommend them for any architectural or sculptural projects. - James Krapp
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1 change recorded — last scanned Oct 9, 2026.
Massachusetts home improvement registration is active2.4
Basement remodels3.7
Deck builds2.1
