The accurate method to determine wall surface heat transfer coefficient,which is an important parameter in calculation for building energy consumption of HVAC system,doesn t exist by now.

Because the heat transfer process of wall surface is influenced by many factors such as airflow velocity and direction, radiation, etc, the heat transfer coefficient of wall surface becomes v.

Effect study of wall on noise abatement;

Discussion on architectural structure of sound insulation and Absorption wall of main powerhouse of power plants;

Forming reasons and prevention of cracks on gas concrete bricking wall;

The application of the steel net supporting board in the wall body of the house;

The cause of cracking occured on the upper wall body with brick-mixed constructure was discussed.

Starting by the problems in the materials selection at job site and construction craftsmanship,the article analyzes the causes why small-sized building blocks\' wall body crack and leak.