Quality Products, Exceptional Service
Continuous Insulation Sheathing
HB ONE | Backer CI™ The BOARD that revolutionizes exterior wall construction serving as a water resistant exterior backer board and EIFS alternative, a 4-in-1 system combining the Secondary WRB, Insulation, Lath, and Scratch Coat into one high-performance board.
HB One Backer CI reduces steps, cuts costs, shortens schedules, and delivers Continuous Insulation for a faster, cleaner, and more predictable Direct to Board stucco finish, replacing multiple layers with one board.
HydroBlok Advantage:
- A water-resistive barrier
- Energy efficient with built-in R-value to meet energy codes without additional insulation
- Compatible as it works with all major finish systems (STO, Dryvit, Masterwall)
- Fast installation – reduce labor by 50% with fewer steps and material
- Lightweight – 75% lighter than cement board for easier handling and installation
- Code Compliant – ICC-ES evaluated, compliant with 2021/2024 IRC and IBC building codes
Additional Information
HB ONE leverages DuPont XPS Foam to deliver higher R-Value, improved durability, and the confidence of a proven material with decades of performance. The board was specifically designed to save contractors time, reduce on-site labor, and simplify the stucco installation process, making ever job easier and more predictable.
HydroBlok HB One Data Sheet
Builder Testimonials
HydroBlok was easy to install, handle, and work with, and the weight savings provided a significant benefit for our installers. The additional thermal break the product provides is another major advantage. Our stone masons specifically mentioned how much they liked working with it and how well the stone adhered. The finished stucco job also turned out cleaner and smoother than with a traditional hard-coat system. We look forward to using HydroBlok on upcoming projects.