Abstract：
With the comprehensive implementation of 65% energy conservation standard, even 75% energy conservation standard is going to be implemented in some areas, thermal insulation material is required to have better composite properties. Polyurethane hard foam has excellent thermal insulation property and high energy conservation effect. There are two types of cast-in-place polyurethane hard foam thermal insulation systems for external wall, such as stripping formwork and stripping-free formwork. They were analyzed and their key technical points, such as design and construction, etc., were introduced to realize appropriate, economic and diversified construction methods of polyurethane hard foam thermal insulation material for external wall.
