March 2013

Too many options | Tech Today

Tech Today 3 stars3 stars3 stars3 stars3 stars

Too many options

Improvements to ASTM C1289 for polyisocyanurate insulation are needed

by Mark S. Graham
Be the first to comment

Faced rigid board polyisocyanurate insulation is the most popular type of insulation used in low-slope roof systems in the U.S. However, the product's ASTM International standard is confusing and cumbersome, which often results in inadequate or improper specifications. If you are involved with specifying or installing polyisocyanurate insulation, you should be aware of these concerns.

ASTM C1289

The U.S. product standard for faced rigid board polyisocyanurate insulation is ASTM C1289, "Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board."

ASTM C1289 is divided into seven types identified as Types I through VII. Type I products are faced with aluminum foil and typically are used in wall sheathing applications. Type II products are faced with mat facers and typically are used in low-slope roof systems. Types III through VII products include composite-type polyisocyanurate boards laminated with perlite board, wood fiberboard, oriented strand board, wafer board or glass mat-faced gypsum board and often are...

To read the article in its entirety, please log in or register (registration is free).

Log in or register for FREE access to this article and other Professional Roofing online content.

Not a user?

Register now for free access
  • Full access to every article
  • Online Web exclusive information
  • Photo gallery
  • Breaking news
  • Online classified ads

Already a user?

Log in now

User name:



Login help
Click here to have your user name and password emailed to you.

Comments (0) Login to post a comment or rating
There are no comments posted.