D7 Building Solutions LLC represents the industry's leading manufacturers in roofing, waterproofing, plaza deck, and daylighting systems — delivering quality solutions you can count on for every project.
Representing the best manufacturers in the industry — from single-ply roofing to skylights and plaza decks.
Explore All Product Lines →Each manufacturer we represent is a proven leader in their category — backed by strong warranties, technical support, and decades of field performance.
We bring manufacturer expertise directly to your project — with hands-on technical knowledge and a commitment to quality at every stage.
Every product line we represent is backed by decades of field performance, rigorous testing, and strong manufacturer warranties you can rely on.
From specification through installation, Lee Mast brings deep product knowledge and hands-on experience to help you select the right system for every application.
Whether you're a general contractor, roofing contractor, architect, or building owner, D7 is your direct connection to the best products and the people who stand behind them.
Our tagline isn't just words. Every product in our line card has been vetted for performance, durability, and long-term value in Colorado's demanding climate conditions.
From the roof membrane down to the deck surface and up through the skylight — D7 covers the entire building envelope with best-in-class solutions.
Locally based and personally responsive — when you call D7, you get Lee. Fast answers, real expertise, and a partner who shows up for your project.