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.

RVI-High Performance Building Experts

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.


About Top Rhinelander, WI Expert Insulators, RVI High Performance
About Top Rhinelander, WI Expert Insulators, RVI High Performance

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

About Top Rhinelander, WI Expert Insulators, RVI High Performance
About Top Rhinelander, WI Expert Insulators, RVI High Performance

Meet The RVI Team

Sam Hartmann

Sam Hartmann

// Leader

Favorite outdoor activity: Hunting, fishing & camping

Started with RVI: 2000 (since inception)

Ashly Hartmann

Ashly Hartmann

// Vice President

Favorite outdoor activity: Camping, biking & hiking

Started with RVI: 2000 (since inception)

terri snyder

terri snyder

// Office Manager

Favorite outdoor activity:  Horseback riding & four wheeling

Started with RVI: 2020


Terrific people to work with, they go above and beyond to make sure that everything is done correctly and will not have problems in the future. Would highly recommend them and would not hesitate to call them if I had other work that needs to be done.

Kathy Chavez

We were extremely pleased with the work that RVI did on our garage. From the initial estimate to installation, everything went smoothly and FAST! They always replied very quickly to all my inquiries. We highly recommend Sam and the team at RVI.

Melissa Kay

The presence of Sam and his crew during insulation was a pure delight. The job they did on every part of our building was excellent. Now that we live here we are amazed at how quiet it is in our place even during storms. It’s a new build so cannot compare costs to before RVI but heating costs compared to previous older home are much less. So thankful and blessed to have worked with RVI.

Kitty Cook

We’ve worked on many great projects together, and looking forward to many more. Knowledgeable and quality work every time.

Justin Auestad

I highly recommend the RVI team.  I am very happy I found an insulation contractor in northern Wisconsin with high quality and great value.

John Borkenhagen

We had R-Value Insulators insulate our shop and we couldn’t be happier with the service that we received and the quality of the product! This will save us so much money on heating and cooling costs in the future. It’s worth every penny!

Dawn Pitlik

RVI (Sam and his team) were awesome to deal with. Everything was done in a timely fashion and quality manner. Thanks guys for a great experience!

Mark Smiley

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


Connect with us below to discuss your future with RVI!