Northern Wisconsin’s Insulation And Building Science Experts
Rhinelander-area natives Sam and Ashly Hartmann have been working with builders and homeowners to make homes in Northern Wisconsin more comfortable since 2000. Drawing on Sam’s career in custom home construction, the couple saw an opportunity to improve the energy efficiency and sustainability of both new and existing homes in this harsh climate using a whole-home building science approach to air-sealing and insulation technology.
Working with Madison-based Focus on Energy, RVI quickly became known as building science experts, dedicated to educating homeowners and builders about modern insulation options and installing those new technologies for increased energy efficiency that improves overall home performance and comfort.

Today, RVI is known as the best insulation company in Northern Wisconsin and as
the area’s most trusted building science experts
Our Philosophy
RVI is a family-owned, faith, customer, and community-focused business. We are dedicated to improving home comfort and energy-efficiency for our Northwoods neighbors through proven building science knowledge, techniques, and best practices.
We firmly believe that every solution starts with the customer’s needs and this customer-centric approach guides everything we do. We are dedicated to providing building science education and delivering the most efficient solutions to maximize home performance, provide overall comfort, and bring peace of mind.


Count on RVI for:
// Expert Consultation and Professional Service
// Annual Energy Cost Savings
// Proven Insulation Technology
// 100% Customer Satisfaction
// Year-Round Home Comfort and Improved Performance
// Highest Energy Efficiency



Meet The RVI Team

Sam Hartmann
// Leader
Favorite outdoor activity: Hunting, fishing & camping
Started with RVI: 2000 (since inception)

Ashly Hartmann
// Vice President
Favorite outdoor activity: Camping, biking & hiking
Started with RVI: 2000 (since inception)

Leo Mandujano
// Senior Insulation Technician
Favorite outdoor activity:
Fishing for Northern
Started with RVI: 2017

Michelle Miller
// Marketing Manager
Favorite outdoor activity:
Biking & golfing
Started with RVI: 2019

JOshua Budreau
// Insulation Technician
Favorite outdoor activity: Anything outdoors
Started with RVI: 2019

JUSTIN WHITTAKER
// Insulation Technician
Favorite outdoor activity: Archery & fishing
Started with RVI: 2020

Terri Snyder
// Office Manager
Favorite outdoor activity: Horseback riding & four wheeling
Started with RVI: 2020
Testimonials
Work with RVI
Are you a homeowner or homebuilder looking for expert insulators in Northern Wisconsin? Look no further. RVI is here to help you improve home comfort and performance, save money on energy costs, and support sustainability all at the same time. Contact us to get started.
Join Our Team
Our team members are our greatest assets and we are always on the lookout for new faces to help grow our team. If you are dedicated to the principles of building science, have home testing or house air sealing experience, are RESNET certified, or want to advance your career in the home insulation industry, contact us. We’d love to hear from you!
We offer full-time employees:
- competitive wages
- paid vacation
- health insurance
- in addition to other benefits
Current Openings:
Insulation Technician
Who We Are Looking For: Due to company expansion, we are seeking motivated individuals to join our team! Are you interested in working for a dynamic and rewarding company that offers year-round employment, benefits, and advancement opportunities? We are looking for long-term, growth-minded team members eager to learn and work in the exciting and evolving industry of High-Performance Building Science. We are only looking for hard-working, trustworthy, and reliable individuals. We are an Equal Opportunity Employer – Veterans and Females are encouraged to apply.
Building Science & Insulation Project Manager
Who We Are Looking For: Are you a RESNET Certified Home Energy Rater or are you interested in training to become one? Do you have estimation experience within the home building industry? Are you interested in working for a dynamic and rewarding company that offers year-round employment, benefits, and advancement opportunities? We are looking for a long-term, growth-minded team member eager to learn and work in the exciting and evolving industry of High Performance Building Science. We are an Equal Opportunity Employer – Veterans and Females are encouraged to apply.