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How To Get R20 In 2X4 Wall. My builder is planning to use 2x4 exterior wall studs with open cell spray foam insulation. I am remodeling a house with 2x4 stud walls now that i opened them up i need to upgrade the insulation to 2009 building code standards r19.
New! Geberit 2x4 System - YouTube from i.ytimg.com
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In a 2x4 wall you can use spray foam but it has to be closed cell not open cell. It just doesn't look as punchy in a bright room setting. Quora is a place to gain and share knowledge. Homeowners use homeadvisor to find pros for home projects.
