BUILDING ENERGY CONSERVATION AND WALL THERMAL INSULATION

The core of building energy conservation in China is to innovate the enclosure structure and the heating system. Wall thermal insulation plays more and more important roles in building energy conservation.
In the world of today, the developed countries pay great attention to energy conservation. The energy consumption in unit building area in our country is nearly 4 times as much as that in developed countries with similar climatic conditions. China is a country with deficient energy resources, hence using the energy reasonably and enhancing the utilization ratio are fundamental plans for society development. Improving the energy conservation technology for exterior wall and the enclosure structure, innovating the heat insulation materials, and reducing building energy consumption are of great significances. Until now, there are three kinds of energy conservation technologies for enclosure structure of buildings in our country: I. exterior thermal insulation on exterior wall; II. interior thermal insulation on exterior wall; III. sandwich thermal insulation. After listing and analyzing their advantages and disadvantages, it is found that the advantages of exterior thermal insulation on exterior wall are the most outstanding, and it should become the major style of wall thermal insulation and the direction of wall thermal insulation of energy conservation buildings.This article introduces the reinforced gypsum plaster polystyrene board, the sandwich thermal insulation in concrete wall, the polymer cement exterior wall panels method, the method of granule polystyrence foam, the hard foam polyurethane, the glass wool felt, the insulation board in cast-in-place concrete with or without metal mesh, and the insulation system for steel structure frame wall, which are insulation materials used in walls at home and abroad. Observing that there are still problems in sticking tiles on surface of exterior thermal insulation on exterior wall, and the tiles may fall off and cause hidden trouble in safety, the authors proposed two methods obtained from practice — sticking and fixing the tiles after plastering with zinc-galvanized steel wire mesh; sticking and fixing the tiles with expansive bolts and net cloth. The solutions for solving the common quality problems especially the installation methods for zinc-galvanized steel wire mesh and net cloth and the fixing method for bolts and expansion bolts are also explained.