Tapered and flute fill Styrofoam XPS (extruded polystyrene) are essential components in commercial roofing systems and steel deck applications. These specialized insulation boards help solve drainage and leveling challenges while improving energy performance. At Foam Sales Group, we supply high-quality tapered and flute fill XPS solutions designed for durability, moisture resistance, and thermal performance.

Conventional Roof System

Tapered XPS insulation is engineered to create slope on flat or low-slope roofing systems, allowing for proper water runoff and preventing ponding. It is often custom-cut to precise slope ratios such as 1/8″, 1/4″, or 1/2″ per foot, depending on the project’s drainage design.

Benefits of Tapered XPS:

  • Enhances roof drainage and longevity
  • Reduces water damage and leaks
  • Lightweight and easy to install
  • Maintains high R-value over time
  • Compatible with single-ply membranes (TPO, EPDM, PVC)

Foam Sales Group works with architects and contractors to design custom tapered layouts that meet code and performance requirements.

Flute Fill: Leveling the Playing Field

Flute fill XPS is used to fill the fluted voids in steel deck roofing before applying insulation or membrane layers. It creates a level surface, improves load distribution, and enhances the performance of the insulation system above it.

Key Features of Flute Fill XPS:

  • Precision-cut to fit metal deck profiles
  • Increases insulation uniformity
  • Reduces installation time and labor
  • Improves structural support and energy efficiency

Flute fill boards are an important first layer in metal deck insulation systems, ensuring smooth and stable performance from the base up.

Why Choose Styrofoam Brand XPS?

Foam Sales Group proudly supplies Dow Styrofoam XPS products, trusted by professionals across the construction industry. Styrofoam XPS features a closed-cell structure, making it exceptionally resistant to moisture, compression, and thermal degradation.

Advantages of Styrofoam XPS:

  • Long-term thermal performance
  • High compressive strength (up to 60 psi)
  • Excellent moisture resistance
  • Long-lasting and durable

Whether you’re designing a new system or retrofitting an existing one, Styrofoam XPS offers reliable performance and energy savings.

Common Applications

  • Commercial flat roofs
  • Industrial and warehouse facilities
  • Retail and office buildings
  • Schools and government projects
  • Green and LEED-certified buildings

Compatible with a wide range of roofing membranes and code-compliant for energy performance, tapered and flute fill XPS is a smart solution for long-term roofing success.