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Flute Filler Roof Insulation

About Flute Filler Roof Insulation

EPS is a cost-effective, durable, and energy efficient solution for insulation applications. Foam-Control® PLUS+® and Foam-Control® EPS Flute Filler acts as the void filler and is designed to be installed over existing metal roofs. It provides a uniform and level substrate and is installed prior to the new roof system.

Foam-Control® PLUS+® Flute Filler Roof Insulation

Foam-Control® PLUS+® is an architectural insulation product line with high compressive strength, stable R-value, and superior moisture resistance. Foam-Control® PLUS+® is a premium grade insulation manufactured to provide architects, specifiers, distributors, and contractors all the features and benefits inherent in a high quality architectural insulation.

  • High compressive strength of 15, 25, 40 or 60 psi
  • High R-value that never changes and is stable over time
  • Closed cell insulation with superior moisture resistance
  • High drying potential to rapidly release absorbed moisture
  • Meets code requirements for direct-to-deck
  • No thermal barrier required (see ICC-ES ESR-1006 and UL ER11812-01)

Strength¹, psi


75º F

40º F

Plus+ 150 15 4.2 4.6
Plus+ 250 25 4.4 4.8
Plus+ 400 40 4.4 4.8
Plus+ 600 60 4.5 4.9
¹Compressive strength @10% deformation.
²R-Value and thicknesses to meet your needs.

Foam-Control® PLUS+® Outperforms XPS and Polyiso
  • Foam-Control® PLUS+® provides more R-value at a lower cost
  • XPS and Polyiso use blowing agents that cause R-value loss over time
  • Polyiso loses R-value during cold and extreme high temperature exposure
  • Foam-Control® PLUS+® available in 15, 25, 40, and 60 psi strengths at a lower cost
  • Foam-Control® PLUS+® has a superior drying potential
  • Foam-Control® PLUS+® is more vapor permeable to help avoid moisture problems

Foam-Control® Flute Filler Roof Insulation

Foam-Control® EPS is a cost-effective, durable, and energy efficient solution for insulation applications. Foam-Control® EPS Flute Filler acts as the void filler and is designed to be installed over existing metal roofs. It provides a uniform and level substrate and is installed prior to the new roof system.

  • Lightweight with high strength
  • Improve R-value of roof assembly
  • No long-term R-value loss or thermal drift
  • No CFC, HCFC, HFC, or formaldehyde
  • Superior moisture resistance

Strength¹, psi


75º F

40º F

100 10 3.9 4.2
130 13 3.9 4.3
1 Compressive strength @ 10% deformation.
2 R-value units are °F·ft2·h/Btu.
3 Recommended for design in WARM climates.
4 Recommended for design in COLD climates.

Foam-Control® PLUS+® & Foam-Control® Flute Filler EPS Roof Insulation

Foam-Control® PLUS+® and Foam-Control® Flute Filler Roof Insulation are recognized for use in direct-to-deck applications.  UL Evaluation Report ER11812-01 and UL Roof Deck Construction No. 458 recognize Foam-Control® PLUS+® 150 up to 6.7" and Foam‑Control® 100 up to 10” being installed directly over steel roof decks along with a Class A, B or C roof covering of 80 mils or less.

ICC-ES Evaluation Report ESR-1006 recognizes Foam-Control® PLUS+® 150 up to 6" and Foam-Control® 100 up to 9” to be applied directly over steel roof decks along with a Class A, B or C roof covering of 45 mils or less.

Manufacturing procedures for roof insulation that are identified in quality control manuals include: material tracing, in-plant testing of product, random sampling of product by outside independent laboratories and labeling of finished product for in-field identification.

ACH Foam Technologies’ quality assurance program is the most comprehensive in the expanded polystyrene (EPS) roof insulation industry. It allows for complete code compliance, certification to critical physical properties and roof listings from UL, FM and others.

Flute Filler Roof Insulation Sizes and Shapes

Foam-Control® EPS Flute Filler can be custom cut to match the profile of the metal flutes on your building. Flute Filler strips are easy to install and provide the necessary support under the roofing membrane. Custom cut and square cut Foam-ControlEPS Flute Filler is available to meet the size requirements of any size flute.

Custom cut Foam-Control® EPS Flute Filler will fill the entire flute space, improving energy efficiency. Square cut Foam‑Control® EPS Flute Filler insulation is a economical way to fill voids in profile roof decks and still provide additional insulation value to each project.

ACH Foam Technologies' EPS roof insulation is recyclable and environmentally friendly. It contains no CFCs, HFCs, HCFCs or formaldehyde, and it comes with a 50-year thermal warranty.
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