Honest & Loyal. Caring. 100% Associate Owned. We Do What it Takes to Get Things Done.
Great People
Helping Build Great Things
Our Promise: You can RELY on us to SUPPORT you and your customers, DELIVER exceptional service, and NEVER PRESSURE you to buy something you don’t need.

Yay! We Did It!
Hallmark Named WI ESOP Company of the Year!
This prestigious award is a testament to the dedication, hard work, and ownership spirit that each of our Associates bring to Hallmark every day. This award is not just about what we do, but who we are – a team of passionate, engaged, and committed Associate Owners who believe in the power of ownership. It is these contributions, enthusiasm, and dedication that make Hallmark an exceptional place to work and grow.
Our Products

DuPont Performance
Building Solutions
The Building Envelope – Wrapped.

Keene™ Building Products
High-Performance Solutions.