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This is where game-changing building begins

Jason Mollak, JPM Construction – Nebraska

About ROCKWOOL R‑Class

ROCKWOOL R‑Class is our premium partnership program for builders who demand more.

It’s a community for those who take pride in their craft. They use high-performance materials and installation techniques to ensure their homes are comfortable, beautiful, efficient and built to last. When you join the R‑Class, you’ll receive support and training from our team of residential building pros, samples, potential rebate savings and more. ROCKWOOL high-performance stone wool is in a class of its own — and so are the builders who make up the R‑Class.

Better Building Blog

R‑Class members have access to exclusive content on ROCKWOOL’s Better Building Blog. Get trusted advice and insights about high-performance building from industry experts. Not a member? Join for free to access all content and to connect with our building community.

Join the R‑Class Newsletter

Join the R‑Class Newsletter

The ROCKWOOL R‑Class Builder program is 100% free. If you’re looking to level up to high-performance builds while building community, sign up today.

ROCKWOOL Stone Wool Insulation Applications

Our thermal and acoustic stone wool insulation materials release the natural power of stone to provide fire resistance, water repellency and durability that sets the standard for high-performance building insulation everywhere.
2021 Fine Homebuilding House Nebraska
Jason Mollak, JPM Construction Inc.
Rendering by Design Level 4

Click on each product to learn where it’s used in the home.

  • ROCKWOOL Safe'n'Sound®

    Inside interior walls for added soundproofing and fire resilience, designed for a friction fit into the wall cavity.

    Between floors, sized for dimensional lumber and I-joist construction to reduce sound transmission and improve fire performance.

  • ROCKWOOL Comfortbatt®

    In attic and exterior wall assemblies to improve a home’s energy efficiency. Featuring a unique flexible edge for an easy install.

  • ROCKWOOL Comfortboard® 80

    On exterior walls and basements for increased thermal performance and fire resilience, this rigid board is used as continuous insulation.

Join the R‑Class

There’s no better time to take your builds to the high-performance level. Join the ROCKWOOL R‑Class Builder Program today.

We constantly use ROCKWOOL insulation inside the cavity and the rigid insulation outside. We stand behind the product; we enjoy using it. We specify ROCKWOOL for our benefit and the project’s benefit.
Nick Schiffer
NS Builders

PREMIUM SUPPORT

At ROCKWOOL, we’re all about building your success. From product and installation basics to technical questions about code compliance and building science, our team of professionals offers premium support to the R‑Class.

Sales

You’ll find our ROCKWOOL sales team on the road at jobsites just like yours, training and connecting directly with R‑Class builders. Reach out to the ROCKWOOL sales pro in your region to set up an in-person or virtual meeting to learn more about your build and where to find our products.

Technical Services

Whether you’re new to ROCKWOOL stone wool and just have some basic questions or need a deeper dive into details that drive the performance of your builds, our technical service reps are here to become a new valued member of your team. Reach our experts by phone or email five days a week.

Building Science

Whether you need help with code compliance evaluations, dew point calculations or energy modeling, this team of building science experts is next-level. ROCKWOOL Building Science works with our more advanced builders to perfect the thermal efficiency and resiliency of each building design, reaching far beyond insulation.