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Roof Insulation

Flat Roof InsulationACH Foam Technologies has been producing quality EPS roof insulation for more than 30 years. ACH's EPS roof insulation is reliable, cost-effective and compatible with major roofing materials and systems.

Expanded Polystyrene (EPS) stands the test of time, and EPS roof insulation is a proven performer in roofing applications. Field studies of EPS roof installations that are 20 to 25 years old and older show that EPS roofing insulation performs well in roof applications.

EPS roof insulation has no thermal drift and does not use blowing agents that diffuse out of the insulation. EPS roof insulation R-values remain stable over its entire life without loss of R-value.

Foam-Control™ EPS Roof Insulations
Mean Control, Not Compromise

CONTROL, NOT COMPROMISE - Foam face-off: Choosing Foam-Control EPS over XPS and ISO.Foam-Control™ EPS roof insulations are engineered to give you the greatest possible control for your roofing system application: from design and timelines, to materials and costs, and—ultimately—control over your results.

ACH products have virtually unlimited design flexibility and can be easily customized. This gives ACH products the ability to be used in almost any Northern California industrial structures for a wide variety of applications, and excellent for flat roof home remodel.

Green Energy Efficient House Plans

The advantages to using Foam-Control™ EPS roof insulations are:

  • State-of-the-art insulation and energy efficiency
  • Improves interior comfort and reduces high energy costs of keeping a building comfortable
  • 20-year warranted stable R-value: no thermal drift like XPS or ISO
  • Unlimited fabrication available: Tapered and Coverboards
  • Variety of density, thickness, and size
  • Optimum design flexibility for the architect and saves the roofer/applicator time and labor
  • Quick production time: plants in Nevada, Utah and Tijuana mean shorter shipping distances combined with a lightweight and easy-to-handle product will simplify your operations and reduce labor costs
  • Cost effective
  • EPS is unaffected by moisture. Exposure to water, or water vapor, does not cause swelling
  • EPS withstands the rigors of temperature cycling, assuring long-term performance
  • EPS will not decompose and will not support mode or mildew growth
  • Meets ASTM C578
  • Building code recognized
  • UL QA monitored, tested, certified, listed
  • FM approved
  • Single-Ply, MOD-BIT, and BUR compatible
  • Perform Guard® termite protection available
  • Contains no CFC, HCFC, or HFC blowing agents
  • Contains no formaldehyde which are harmful to the earth's ozone
  • EPS is inert and stable and does not produce methane gas or contaminating leachates
  • As an Energy Star Partner, ACH EPS roof insulation is recyclable and environmentally friendly.

This Looks Like a Job for Expanded Polystyrene (EPS)

Foam-Control EPS R-value ChartIn the roofing industry, Foam-Control™ EPS roof insulations are among the most versatile, energy efficient, and cost effective insulators available; delivering extremely high, stable R-values. Depend on Foam-Control™ EPS to do the job as flat stock or tapered with labor-saving factory or field applied face laminates. Foam-Control™ EPS roof insulations are compatible with single-ply, modified bitumen, or built-up roofing.

Stands Up to the Elements,
Good for the Environment

ACH Foam-Control™ EPS, when used as a component in an engineered roofing system, helps to resist some of the toughest conditions nature can deliver, like rain, snow, wind, heat and cold.

Standards Icons Proven to Meet, or Exceed Building Codes

ACH Foam Technologies' quality assurance program is the most comprehensive in the EPS industry. It allows for complete code compliance, certification to critical physical properties and roof listings from UL, FM and others. Foam-Control™ EPS manufacturers offer product warranties that ensure thermal performance, physical properties, and termite resistance. Foam-Control™ EPS can stand up to all industry tests—and has. No other EPS can say that.

ACH Foam-Control™ roof insulation is:

  • durable and versatile
  • strong and lightweight
  • easy to handle
  • has long lifespan
  • environmentally friendly
  • energy efficient
ACH EPS samples

Roof Drainage

ACH EPS Tapered Roof InsulationACH Foam-Control™ Tapered Roof Insulation was developed more than 30 years ago with a dual purpose: to drain and insulate dead-level roof decks. Lightweight Foam-Control™ EPS is a value-engineered system that has been proven in new and reroof applications all over the country.

The roofing industry accepts that membrane performance and roof drainage go hand in hand. Membrane manufacturers will not guarantee the performance of their system without positive drainage, and building codes mandate positive roof drainage.

Simply stated, all single-ply, modified bitumen and BUR roofing membranes are less likely to leak and fail if water is not standing on top of them. Potential water damage to the building and its contents is thus eliminated. ACH Foam-Control™ EPS Tapered provides the drainage and insulation necessary under all commercial roofing systems and has been used successfully in millions of square feet of single-ply, modified bitumen, and built-up roofing. ACH Foam-Control™ Tapered Roof Insulation is a great solution for low slope roofing.

Also, pre-engineered factory cut cricket and saddle systems provide effective and economical drainage on structurally sloped roof decks.

Flat Roof Insulation

ACH EPS Flat Roof InsulationACH Foam-Control® Flat Roof Insulation provides the high, long-term R-value of EPS and labor-saving face laminates. Suitable for use with all roofing membrane materials, EPS roof insulation is compatible with loose-laid and attached single-ply membranes, conventional built-up roofing or modified bitumen systems.

Foam-Control® Flat Roof Insulation is unfaced EPS and is suitable for use with loosely laid single-ply membranes. It is also used with conventional BUR and mechanically or adhesively attached single-ply and modified bitumen membranes when field-applied coverboards are use. Boards are standard 4'x4' and 4'x8' sizes.

ACH Foam-Control® roof insulation is available with a factory-laminated fiberboard, perlite or OSB face that give greater panel integrity and reduces installation time. It's ideal for use with conventional BUR and mechanically or adhesively attached single-ply and modified bitumen membranes. Standard panel size is 4'x4' and 4'x8'. OSB-faced panel size is 4'x8'.


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ACH Foam-Control® Flat Roof Insulation
R-Values at 1 lb. Density
Thickness in Inches R-Value at 40° F R-Value at 75° F
2.0 8.3 7.7
2.4 10.0 9.2
3.0 12.5 11.6
3.5 14.4 13.3
4.0 16.7 15.4
4.8 20.0 18.4
7.2 30.0 27.7

Nailbase Roof Insulation

ACH EPS Nailbase Roof InsulationACH Foam-Control® Nailbase Roof Insulation is a nailable panel of exposure I-rated oriented strand board (OSB) and UL classified Foam-Control® EPS rigid insulation. As an ideal insulation and nailable roofing surface over structural roof decks, its stability and traffic resistance make it the perfect solution for both residential and commercial roof decks.

Foam-Control® Nailbase Roof Insulation installs quickly over structural roof or wall decking with screw connections. Standard roofing materials, such as shingles, shakes, standing-seam metal, tile, slate, etc. may be applied to Foam-Control® Nailbase Roof Insulation.

ACH Foam-Control© Nailbase Roof Insulation:

  • Saves labor with one-step installation
  • Large size panels available
  • Saves energy—no thermal breaks
  • No CFC, HCFC, HFC or Formaldehyde
  • No long-term R-value loss or thermal drift
  • Outside installation-construction can occur without disruption of inside living areas
  • Termite resistant Perform Guard EPS available
  • Environmentally friendly
ACH Foam-Control® Flat Roof Insulation
R-Values at 1 lb. Density
Thickness in Inches R-Value at 40° F R-Value at 75° F
2.0 8.3 7.7
2.4 10.0 9.2
3.0 12.5 11.6
3.5 14.4 13.3
4.0 16.7 15.4
4.8 20.0 18.4
7.2 30.0 27.7

Direct-to-Deck EPS Roof Insulation

ACH EPS Direct-To-Deck Roof InsulationICC-ES Code EvaluationsDirect-to-Deck EPS is a cost-effective, durable and energy-efficient solution for roof insulation. With the release of the ICC-ES Evaluation Report ESR-2043, EPS insulation can be applied directly over steel roof decks without the use of a code-specified thermal barrier, resulting in reduced material and labor costs.

ACH EPS Direct-to-Deck being installed by roofers

ACH Foam Technologies' Direct-to-Deck EPS is compatible with all major roofing materials and assemblies. Additional benefits, such as design flexibility, resistance to moisture and high R-value, make ACH's EPS roof insulation the preferred roofing solution among contractors, architects and engineers.

In comparison to Polyisocyanurate and Extruded Polystyrene, ACH Direct-to-Deck Expanded Polystyrene (EPS) has lower cost per R-value. Shorter production time results from localized manufacturing plants creating shorter shipping distances make ACH EPS an unbeatable value.

ACH Direct-to-Deck EPS Physical Properties

SecureTherm™ Composite Roof Insulation

SecureTherm Composite Roof  InsulationSecureTherm™ Composite Roof Insulation is a high performance, light weight and water resistant expanded polystyrene (EPS) roof insulation that is factory laminated to a durable fiberglass facer to meet UL Class A requirements.

ACH Foam's SecureTherm™ Composite Roof Insulation is the preferred roofing solution among architects and contractors for low-sloped applications employing all mechanically fastened or ballasted single ply, modified bitumen and built-up roof systems.

SecureTherm™ Composite Roof Insulation offers energy efficiency, durability and saves installation labor by eliminating the need for a cover board in many membrane applications. SecureTherm™ Composite Roof Insulation has a stable R-value and is available with a 20-year thermal warranty, along with a variety of thicknesses to meet virtually any R-value. EPS Composite Roof Insulation meets and exceeds requirements of ASTM C578.

Polar Fold™ Roofing Recover Board

ACH EPS Polar Fold Roofing Recover BoardPolar Fold™ is a high performance roofing recover board consisting of light weight, energy efficient, expanded polystyrene (EPS) laminated between strong foil and film facers. Polar Fold™ Roofing ReCover Board is the preferred solution for re-roofing applications among architects and contractors and is compatible with single ply ballasted and mechanically attached roof systems.

Polar Fold™ offers energy efficiency, water resistance and versatility. Polar Fold™ is easy to handle and install, saving time and labor. The innovative fan fold design insures Polar Fold™ lays flat during installation providing a level surface for roof membranes.

Polar-R™ is also available for roof applications and comes in 4'x8' sheets in ½" to 4" thicknesses and is manufactured with the same quality materials as Polar Fold™.

Some membrane manufacturers will require a higher concentration of fasteners. Consult membrane manufacturer for installation instructions. One fastener is placed at each corner of the leading and trailing edges of Polar Fold™. One fastener is placed every 12 feet on altering sides of the sheet thereafter. When used with dark colored membranes, Polar Fold™ should be installed with the silver or foil side up.

Building getting Polar Fold Roofing Recover Board installedLabor Savings & User Friendly
Polar Fold™ is available in 4' x 50' fan fold sheets that arrive in compact, light weight bundles, making it easy to handle and install. The 50 foot length of Polar Fold™ speeds installation time. Polar Fold™ is designed to lay flat during installation, eliminating seam welding problems experienced with other fan fold insulations. Beginning of installation indicates that the contractor has accepted the condition of the existing substrate.

Durable and Water Resistant
Polar Fold's high performance EPS is wrapped in tough film and foil facers making it durable and water resistant. Polar Fold™ has low water absorption and rate of permeability which makes it a superior product for re-roof applications. The film facers allow single ply membranes, including PCV, to be installed directly over Polar Fold™ without additional slip sheets.

Cost Effective Precision Performance
Polar Fold™ is less expensive than other re-cover products and provides more R-value for less money. High performance EPS insulation also has a consistent long-term R-value that does not experience thermal drift.

Structural Insulated Panels

ACH Structural Insulated PanelsR-ControlR-Control® SIPs (Structural Insulated Panels) are a strong structural system consisting of Perform Guard® Expanded Polystyrene (EPS) insulation laminated to oriented strand board (OSB) forming a structural panel. R-Control® Structural Insulated Panels are used for walls, roofs and floors. They resist loads caused by wind, snow and seismic activity.

R-Control® Structural Insulated Panels (SIPs) help you build faster. Labor time savings range from 30-40%. The contractor's crew spends more time building and builds more in less time. R-Control® Structural Insulated Panels (SIPs) are available in sizes from 4'x8' to 8'x24'.

R-Control© Structural Insulated Panels (SIPs) have passed structural and fire tests as prescribed by national building code authorities. Load tests include transverse, vertical compression, and racking shear loading. Fire tests include corner room burn and fire exposure under load.

R-Control® incorporates a thick core of rigid Perform Guard® EPS termite resistant insulation. Perform Guard® is made under a patented process which uses a natural mineral that is formulated to resist termites and builds it right into the insulation.


Energy Star PartnerGo Green. Go White.GREEN ROOFS:
High strength Foam-Control™ EPS roof insulations can be supplied for use in Green Roof designs, such as earth protected/ballasted garden roofs.Foam-Control™ EPS roof insulation with compressive strengths of up to 60 psi are available. Foam-Control™ EPS is also lightweight helping to lower structural demands on the building.


ACH EPS foam insulation information and graphics ©ACH Foam Technologies.
Used by permission.

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