When Advocate Aurora Health opens its new 16-bed addition at its Grafton medical center, it will be the first building in Wisconsin that was fully built using a method called modular construction.

The Grafton facility is among Appleton-based The Boldt Co.’s first health care projects to use what it calls full volumetric modularization. In other words, it was almost entirely pre-fabricated off site, minus things like the building foundation and underground plumbing.

Boldt has used this building method in other projects within the last year or so. But, Grafton is the contractor’s first permanent installation. It’s also the first of its kind in the state, according to Boldt.