[Roofing, Siding, Remodeling, & Hail Damage Contractor MN - Welter Construction - The Midwest's Total Construction Contractor Roofing, siding, remodeling, hail damage & more! Welter Construction is the Midwest's total construction contractor. That means whatever the size, scope, or location of your construction project we've got you covered! From roof to basement, our professional technicians have the skills to get the job done right!]