Bridge to Better Building

Solutions from the INSIDE out

1. Understand proper applications for spray foam and eliminate the myths of historical improper use. 2. Participants will be able to calculate the correct thickness and application of spray foam in their climate zone. 3. Identify unique situations where spray foam can be utilized to accomplish difficult insulation and air sealing strategies

OCSPF Open cell spray polyurethane foam ½# per cubic foot CCSPF Closed cell spray polyurethane foam 2# s per cubic foot

Chemical make up Blowing agents Health considerations Open cell Closed cell

Chemical make up Blowing agents Health considerations Open cell Closed cell What about the occupants? focusonthefamily.com

Chemical make up Blowing agents Health considerations Open cell Closed cell

Perfect air seal tool Can burst into flames Promotes mold growth Rots roofs Smells bad Deteriorates over time

Areas to use spray foam Climate zones Building assemblies Inside outside Conditioned attics Crawl space

Areas to use spray foam Climate zones Building assemblies Inside outside Conditioned attics Crawl space https://buildingscience.com

Areas to use spray foam Climate zones Building assemblies Inside, outside Conditioned attics Crawl space

Open vs closed Minimum depth Hybrids Moisture movement Air barrier requirements Lumber moisture content Applicator error

Climate zone 4 Climate zone 5 Others zones

Characteristics Air sealing Vapor retarder Good to great R value Complete coverage No convective properties Quiet Structural rigidity

Design example Unventilated roof assembly 2 CCSPF 2# R6.8/in =R14 8 BIBs R4.18/in =R34 Total R47 Hybrid wall 2 closed cell against sheathing =R14 3 ½ BIB s dense packed FG =R15 Total R29 Hybrid floor 2 CCSPF against subfloor =R14 8 batt insulation = R25 Total of R39

Design example Unventilated roof assembly 12 OCSPF 1/2# R3.8/in =R45 Thermal break on rafter edge Total R45+ Wall 3.5 closed cell against sheathing =R25 Foam creates on air barrier, leave air space Total R25 Dry crawl floor 10 OCSPF against subfloor =R37 Thermal break on joist edge Total of R37+

Climate zone 4 Climate zone 5 Others zones http://www.greenbuildingadvisor.com/

Spray foam is an excellent tool Myths should not detract from great solutions Installer must be properly trained in application and safety Design must be calculated correctly for specific climate zone