I-joist
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New Book Details I-Joist Construction
A free, downloadable guide explains how to use I-joists (and avoid foam insulation) in high-performance buildings
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The Difficulty of Stopping Air Leakage Between the House and Garage
I-Joists and open-web floor trusses, especially with flex duct running across the garage wall, can be troublesome
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Engineered Lumber
Engineered-Lumber Rafters Are Stronger and Straighter, But They Cost More