Rigid Board Insulation Services

High-Density Thermal Protection for Commercial & Industrial Projects

At Alpha Insulation & Waterproofing, we install rigid board insulation systems that deliver exceptional thermal performance, moisture resistance, and structural durability. Backed by the national strength of Installed Building Products (IBP), we provide fast access to materials, certified installation teams, and consistent results across all 14 of our U.S. locations.

Commercial building

What Is Rigid Board Insulation?

Rigid board insulation is a closed-cell foam panel used to insulate walls, roofs, and foundations. It’s ideal for commercial and industrial buildings that require:

  • Continuous insulation to eliminate thermal bridging
  • High R-values per inch for space-constrained assemblies
  • Moisture resistance in below-grade or humid environments
  • Durability in high-traffic or load-bearing applications

Types of Rigid Board We Install

Type Material R-Value (per inch) Best For
Polyisocyanurate (Polyiso) Foil-faced foam R-6 to R-6.5 Roofs, walls, curtain walls
Extruded Polystyrene (XPS) Closed-cell foam R-5 Foundations, below-grade, slabs
Expanded Polystyrene (EPS) Bead foam R-3.6 to R-4.2 Walls, under slab, roof decks

We help you select the right product based on climate zone, building type, and code requirements.

Ideal Applications

Rigid board insulation is commonly used in:

  • Exterior wall sheathing (continuous insulation)
  • Roof assemblies (especially low-slope commercial roofs)
  • Foundation walls and slabs
  • Cold storage and freezer facilities
  • Precast concrete and tilt-up panels
  • Metal buildings and warehouses

Performance Benefits

  • High Thermal Efficiency – Maximize R-value in minimal space
  • Moisture Resistance – Closed-cell structure resists water absorption
  • Structural Support – Adds compressive strength to assemblies
  • Fire & Code Compliance – Meets ASTM and NFPA standards
  • Sustainability – Many products contain recycled content and support LEED® credits

Why Developers Choose Alpha

  • Nationwide Reach – 14 U.S. locations for consistent service
  • Material Access – Backed by IBP’s supply chain and pricing power
  • Certified Installers – Trained in Polyiso, XPS, and EPS systems
  • Proven Experience – Trusted on stadiums, hospitals, and Class A towers

Let’s Talk Rigid Board

Need a partner who understands the science behind the system?

Call 972-446-2600 or contact us online to connect with your local Alpha team.

Contact Us Today

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Client Testimonials

Alpha is performing well on the UT Scaffold Center project. Alpha’s personnel assigned to the project have been respectful of others and have executed their work plan safely. The completed waterproofing of the existing grade walls, elevator pit, and dock leveler were coordinated closely with grading and concrete trade partners. These installations met project schedule, budget, and quality objectives.
Toby Lilliston, DPR Construction
It is my pleasure to recommend Alpha Insulation & Waterproofing, Inc. as a preferred contractor for the City of Milwaukee, Wisconsin…I am pleased to say that they are part of our desired team of contractors that make our projects a success.
Ryan Schulze, City of Milwaukee
Alpha is a hands on company that has the knowledge and vision to deliver a quality product to the customer. What impressed us the most about Alpha was their follow up; they truly care about their scope. They want to be the best and it showed at the end of the day.
Aaron Burns, Crossland Construction Company
I had the great fortune of working with Alpha on a recent TDADS (Health and Human Services) project. Alpha played a pivotal role in the project passing on the first inspection. Their problem solving and timely issue resolution proved to be immeasurable. We thank Alpha for the tremendous job they did for us and for really making us look good to the client.
J.P. Waller, The Beck Group