When designing and building using spray foam insulation you need to take into account code related to:
Spray foam code
- Local codes based on IBC 2009: Chapter 26
- Local codes based on IBC 2012: Chapter 26
Building thermal envelope code
- Local codes based on IECC 2009: Section 502
- Local codes based on IECC 2012: Section C402
There may also be codes related to the specific application – ask Icynene for help in identifying the correct code for your project.
To find out which code your local code is based on, go to http://bcap-ocean.org/code-status-commercial.
Do I need a thermal barrier?
In an occupied space, you need a thermal barrier adjacent to either low density or medium density foam - this could be ½ inch gypsum board, or from the code prescribed list in 2603.4, depending on the spray foam section of your local code. See each Icynene spray foam product to check which paint-on or spray-on thermal barriers can be used.
If the space is unoccupied, you don't need a thermal barrier.
Do I need a vapor barrier?
This depends on your local code requirements; it’s affected by climate and the elements in the building envelope.
What R-value do I need?
This depends on your local code requirements.
ICC code allows Icynene spray foam insulation to be installed with less than the prescriptive minimum R-value and still meet the intent of the code.
Compliance based on simulated energy performance requires that a proposed residence (proposed design) be shown to have an annual energy cost that is less than or equal to the annual energy cost of the standard reference design that is based on the minimum prescriptive standard. When the air tightness of the building envelope is factored into the computer calculations, the building will require less R-value than the prescriptive level mandates. Typically the R-value can be reduced by 20-25%, depending on the code version that is being used.
See 2006 / 2009 / 2012 IBC (IECC) Section 506 - Performance-Based Compliance.
Get Answers to Spray Foam Code Questions for Your Project
Contact Icynene Customer Service at 1-800-758-7325 or by email for more detailed help to find answers on these code requirements for your project. Many factors affect code requirements for a project, and we’d be happy to find the right expert to discuss your situation and local codes.