search
cart
facebook twitter linkedin youtube instagram Spotify Podcasts Apple Podcasts TikTok Spotify Podcasts Apple Podcasts TikTok
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • TOPICS
    • Cool Roofing
    • Event News
    • Latinos in Roofing
    • Low Slope
    • Legal
    • Metal
    • Project Profiles
    • Roofing Supply Pro
    • Roofing Safety
    • Steep Slope
    • Sustainable Roofing
    • Technology
  • EXCLUSIVES
    • Best of Success
    • Contractor Profile
    • IRE Show
    • Roofing Contractor of the Year
    • Top 100
    • Young Guns
    • State of the Industry
  • MULTIMEDIA
    • Videos
    • Podcasts
    • Roofing Quizzes
    • IRE Videos
    • Webinars
    • Infographics
  • PRODUCTS
    • New Products
    • Featured Products
  • COLUMNS
    • Editor's Note
    • Exit Planning
    • Guest Column
  • EVENTS
    • International Roofing Expo
    • Webinars
    • Best of Success Conference
    • Industry Events
  • DIRECTORY
    • Associations
    • Distributors
    • Manufacturer/Supplier
    • Business Services
    • Get Listed
  • MORE
    • Roofing Contractor Newsletters
    • Techos y Más Advisory Board
    • RC Store
    • Roofing Supply Pro
    • Custom Content & Marketing Services
    • Market Research
    • Sponsor Insights
    • Company Spotlights
    • Classifieds
      • Auctions
      • Business For Sale
      • Business Opportunities
      • Equipment For Sale
      • Positions Available
      • Products
      • Safety
      • Software
      • Services
      • Training
    • Contact Us
  • EMAGAZINE
    • eMagazine
    • Advertise
      • Editorial Calendar
      • Contact
    • Archive Issues
  • SIGN UP!
Columns

Seaming: Polyisocyanurate Roof Insulation

By Josephine DeLorenzo
April 30, 2001
The iso industry is going through a number of changes. The message to roofing contractors is simple: You really need to pay attention.

There is no doubt which material is king in the category of high-thermal roof insulation. Polyisocyanurate roof insulation (“iso,” “polyiso”) is, and indeed has been for a while, the magnum opus of low-slope roof insulation. After so many years of successful service, there is a tendency to take for granted that it will always be there and will always provide a sure and economical solution.

But are you willing to bet your business on it?

What’s the problem with iso, you say? Well as of today, as far as we know, there isn’t one. However, the iso industry is going through a number of changes and some rather daunting challenges. The message to roofing contractors is simple: You really need to pay attention. Your good name goes out on every piece of the roof insulation that you install, and the rest of the membrane and all the many fine details are useless if the insulation does not perform as advertised.

To their credit, the iso manufacturers have navigated their way through changes before, such as the move from chlorofluorocarbons (CFCs) to hydrochlorofluorocarbons (HCFCs). While the transition was not without some bumps and bruises, the job got done and the iso industry survived to meet the next challenge: to eliminate all fluorocarbons and change to more environmentally friendly blowing agents by 2003.

Now 2003 may seem like a long way out, but in terms of the preparation, plant re-engineering, testing and due diligence required to make such a substantive change, it is virtually right here, right now. Some manufacturers are up to speed, having converted a broad range of their assets to the new technology. Others have yet to bring even one plant online. Their task is to bring new products to market while the old pressures of competitive pricing are as strong as ever.

Roofing contractors should retreat to basic blocking and tackling where iso is concerned. You should know which product is going on which job, starting right away. It may be a couple of years before the “new” iso shows up on your front door, but you need to be aware of it. In the meantime, you should revisit all the old rules for proper storage, handling and application of iso. When you are introduced to a new product, you may or may not be required to handle or install it differently. You simply need to have your eyes open, and cease taking this seemingly routine product for granted.

Iso manufacturers have worked very hard to give you a feeling of security with this product — no small task when you get right down to it. It will be up to them to maintain this image after changing to a new technology. More important, during the time of change when both products may be on the market at the same time, it will be incumbent upon contractor and manufacturer alike to recognize this as the “danger zone” that it could be. Roofing contractors need to communicate at a high level with manufacturers to fully understand how and where the product has changed when it changes, not after they have installed thousands of squares of it.

To keep up with changes in iso technology, we suggest you stay in touch with your iso manufacturer for specific information, or the industry association, Polyisocyanurate Manufacturers Association (PIMA) for general iso industry updates.

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

Josephine DeLorenzo is editor of Roofing Contractor. She can be reached at 248.244.6497.

Recommended Content

JOIN TODAY
to unlock your recommendations.

Already have an account? Sign In

  • Roofing Contractor's Top 100

    Benchmarking the Best in Roofing

    The 2026 Top 100 roofing contractors are revealed,...
    Top 100 Roofing Contractors
    By: Art Aisner and Tanja Kern
  • KEE membrane application on a roof

    A Beginner’s Guide to Single-Ply Roofing Membranes

    While PVC and TPO appear extremely similar, the chemistry...
    Low Slope Roofing
    By: Peter Gross
  • A couple stands facing a very nice home

    The Homeowner's Roofing Journey in 2026

    RC asked homeowners what their roofing journey was like,...
    Steep Slope Roofing
    By: Art Aisner
You must login or register in order to post a comment.

Report Abusive Comment

Manage My Account
  • eMagazine Subscription
  • Sign Up for the Newsletter
  • Online Registration
  • Manage My Preferences
  • Subscription Customer Service

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to the Roofing Contractor audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of Roofing Contractor or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • A finished comercial roof with a white coating
    Sponsored byFlashCo

    Best Practices for Allocating Scarce Labor Resources: Don’t Forget the Accessories

  • A metal roof
    Sponsored byWestlake Royal Building Products

    Metal Roofing Products That Protect Homes from Hurricanes and Build Pro Reputations

  • 3 men standing on a loading dock near a semi truck
    Sponsored by10X Roofing

    Why Good Roofers Struggle to Grow

Popular Stories

Tesla Solar Roof

Tesla Solar Roof Exit Leaves Contractors Facing Costs, Service Questions

Metal Roof Commercial

The Rise of Metal Roofing for Commercial Applications

The staff of Eskola Roofing & Waterproofing

Eskola Builds a National Roofing Vision

Events

July 28, 2026

How Top Home Services Companies Turn Every Conversation Into Predictable Revenue

On Demand In this webinar, we'll outline how top contractors are turning every conversation into predictable revenue by coaching every comfort advisor visit, not just the ones a manager rides along on.

September 24, 2026

The 7 Promotes to Grow Your Roofing Business

On-Demand Most roofing owners are great at the work. Knowing how to communicate what you do, why it matters, and what sets your business apart is just as important.

This session breaks down the 7 Promotes every roofing owner should know. From your personal story and value proposition to your hiring pitch, each one helps you communicate more clearly with homeowners, employees, and potential hires.

View All Submit An Event

Related Articles

  • Polyisocyanurate Roof Insulation Put to the Test

    See More
  • polyiso roof insulation boards

    How Thick is Too Thick When Installing Polyiso Roof Insulation?

    See More
  • Roof Insulation Panel

    See More

Related Products

See More Products
  • urban resilience.jpg

    Green Roof Retrofit: Building Urban Resilience

See More Products

Related Directories

  • Polyisocyanurate Insulation Manufacturers Assn. (PIMA)

    Since 1987, PIMA has served as the voice of the rigid polyiso industry advocating for practices and policies that advance the construction of energy-efficient buildings. Beyond its public policy work, the Association represents the interests of the polyiso industry at codes and standards venues and through outreach to design professionals, contractors, building owners, code officials, and other key stakeholders.
×

Be in the forefront of the roofing industry!

Join thousands of professionals today. Shouldn’t you know what they know?

JOIN NOW!
  • RESOURCES
    • Advertise
    • Contact Us
    • Directories
    • Store
    • Want More
  • SIGN UP TODAY
    • Create Account
    • eMagazine
    • Newsletters
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • Instagram
    • TikTok
    • YouTube
    • X
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2026. All Rights Reserved BNP Media, Inc. and BNP Media II, LLC.

Design, CMS, Hosting & Web Development :: ePublishing