The document discusses a project analyzing the effect of adding polyurethane foam on the thermal conductivity of materials. The objectives are to reduce thermal conductivity and examine its effect on compressive strength. Samples of concrete with different percentages of polyurethane foam added were created and tested after 7, 14, and 28 days of curing. Thermal conductivity decreased and densities lowered with more foam added. Compressive strength also decreased with foam content but improved with longer curing. Adding 0.25% foam gave good insulation and strength. The results indicate polyurethane foam is effective at lowering thermal conductivity of concrete for building insulation applications.