The research studied how insulation affects the temperature inside buildings during hot summers in Lebanon. They compared insulated walls with no insulation to see which kept the building cooler. Three test rooms were used, each with different insulation locations on the walls. They discovered that having insulation on the outside of the walls works best for keeping the inside cool. When they removed the insulation, the room was still cooler than the one with insulation on the inside. This shows that having no insulation can sometimes be better than having it on the inside of the walls in hot climates.