Spray Foam United States
Multi-Family Projects
ENERTITE® Open-Cell SPF Insulation
High-Performance Spray Foam for Energy-Efficient High Density Dwellings
Multi-Family Homes in Southern Arizona
Two multi-family developers in the Tucson, Arizona area faced distinct construction challenges—each requiring a high-performance insulation system that could address thermal control, air sealing, and long-term durability. In both cases, they chose ENERTITE® open-cell spray polyurethane foam (SPF) for its superior performance, sustainability credentials, and reliable installation. In total 572 units were constructed using this design for simplified code compliance and condensation control.
Project Overview
Location: Tucson-area multi-family communities, Arizona
Project Type: Multi-family residential construction
Featured Application: Low-slope roof deck insulation / unvented attic assemblies
Product Featured: ENERTITE® open-cell spray polyurethane foam insulation
Projects Included: Two separate multi-family developments in Marana and Tucson, Arizona
Project Sizes: 272 units in Marana and 300 units in Tucson
Primary Challenges: Thermal performance, condensation control, durability concerns, and material supply delays
Code Compliance Path: Performance Path for energy code compliance, with HERS Raters retained on both projects
Solution: ENERTITE® open-cell SPF was applied to the underside of the roof deck to provide air sealing and thermal insulation benefits
Why ENERTITE for Multi-Family Construction?
ENERTITE® open-cell spray foam offers:
- Reliable thermal performance (R-value 3.7–4.0 per inch)
- Excellent air sealing and moisture control
- Superior sound control and noise absorption
- GREENGUARD Gold certified for low chemical emissions
- UL-validated for mold resistance, low VOCs, and bio-based content
- ENERGY STAR® certified for energy-efficient construction
- Hourly-rated UL 263 fire resistance
- STC ratings of 57–59 in floor/ceiling and wall assemblies
With its water-based formulation and low global warming potential, ENERTITE® delivers environmental responsibility without compromising performance.
Project 1: 272-Unit Community in Marana, AZ
Challenge:
Roof damage caused by moisture and condensation was a recurring issue in prior builds insulated with conventional materials.
Solution:
ENERTITE® was sprayed under the flat roof deck over the 2x4 top cord of open-web trusses. This application provided continuous R-17 insulation—exceeding the R-5 minimum requirement in Climate Zone 2 (per 2018 IRC Table R806.5)—while eliminating air gaps that cause condensation and degradation.
Project 2: 300-Unit Development in Tucson, AZ
Challenge:
The originally specified polyiso board faced long lead times, threatening to delay construction.
Solution:
ENERTITE® was approved by the local building authority as a substitute for R-38 fiberglass batts. Combined with a 1” polyiso layer on the exterior, ENERTITE® provided R-22 continuous insulation under the roof deck, meeting Performance Path compliance for both thermal efficiency and moisture control.
Proven Results
By selecting ENERTITE® spray foam, both projects gained:
- Faster installation and reduced construction delays
- Improved long-term energy performance
- Enhanced occupant comfort and indoor air quality
- Lower maintenance risks from moisture-related damage
