HEAT-INSULATING EXECUTION METHOD OF RESIDENCE

PROBLEM TO BE SOLVED: To provide the heat-insulating execution method of a residence capable of being easily executed surely and capable of imparting sufficient airtightness to the residence. SOLUTION: A heat-insulating material, in which a surface arranged on at least the indoor side of a fiber mat is covered with a synthetic resin film 12 having vapor resistance of 10 m2.h.mmHg/g or more and which has a flange- shaped lug section 14 formed by extending the synthetic resin film from the four side faces of both side faces along the long side direction of the fiber mat and both side faces along the short side direction, is used as a fibrous heat-insulating material 10, and each of the lug sections 14 along the long side direction of the fibrous heat-insulating material 10 is fixed onto columns or studs. One of the lug sections 14 along the short side direction of the fibrous heat-insulating material 10 is placed along a floor foundation material from the indoor side of a wall and fixed by pinching by the floor foundation material and a floor finishing material on a lowermost floor, and arranged along a ceiling foundation material from the indoor side of the wall and fixed by pinching by the ceiling foundation material and a ceiling material on an uppermost floor.