NorthEast SIPsAir Infiltration and the SIP Advantage
Air leakage causes 25–40% of a building's heating and cooling loss. The physics of infiltration, and how SIPs compare with framing, spray foam and CI.
Read in full →The Economics of Additional R-Value
Every extra unit of R-value saves less than the one before. SIPs do not repeal that — they change what each delivered unit costs. Where the economics stop.
Read in full →SIP Foam Core Thermal Performance
Tested system R-values for EPS, GPS and polyurethane SIP cores at 75°F, 40°F and 25°F — measured through the whole panel, OSB skins included, not foam alone.
Read in full →Independent Cost Studies and the SIP Advantage
Nearly every SIP cost figure traces back to a manufacturer or trade association. The literature sorted by source independence, and what each tier supports.
Read in full →SIPs and the IECC U-Factor Compliance Path
The 2021 IECC has two co-equal compliance paths. For SIPs the U-factor path is simpler to document and more favorable, because it counts thermal bridging.
Read in full →How Far Can a SIP Span?
Span tables return a load, not a distance. How panels, beams and structural splines actually divide the work — and why the honest answer is a drawing.
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