External wall insulation refers to a kind of insulation material used for wall construction. It is mainly composed of polymer mortar, glass fiber mesh cloth, flame-retardant molded polystyrene foam board or extruded board and other materials. Thermal insulation, waterproofing, and decorative functions are the preferred materials for the external insulation of modern buildings. Next, Xiao Bian will introduce the external wall insulation practices and exterior wall insulation materials.
External wall insulation practices
1, polystyrene board outer insulation corner fixed practice
The insulation board shall start from the base of the wall or a firm support, and the bottom of the board shall be provided with aluminum alloy brackets, which shall be installed from the bottom to the top row by row in the horizontal direction, checked by pull cables, and straightened by lead plummets. The vertical seams at the outside and inside corners should be staggered. When setting up, sticking or sticking should be used to squeeze the adhesive layer so that the thermal insulation board has a regular and firm bond on the outer wall. The temperature of the air and the surface temperature of the exterior wall shall not be lower than 5°C during the installation of the insulation board and at least within 24 hours after installation.
2, EPS board, XPS board thin plastering external wall insulation
The surface of the grass-roots floor should be clean, free of oil and attachments that interfere with adhesion; raised, empty drums and loose parts should be removed and leveled with a polymer cement mortar. According to the requirements of the building facade design, horizontal and vertical control lines, expansion joints, and decorative joints are to be popped on the wall. Hang vertical lines at the Great Wall (Yin and Yang Kok) and other necessary places. Hang horizontal lines at appropriate positions on each floor to control the verticality and flatness of EPS boards and XPS boards.
3, EPS board, XPS board paste construction
(1) Dot-box sticking method: The adhesive-coated mortar with a width of about 50mm is applied around the periphery of the extruded board, and the thickness is 5mm~10mm; 9 bonding points are arranged in the middle (8 or 3 points can be actually arranged according to the project), wherein the diameter is 80mm. 6 pieces with a thickness of 10mm, 3 pieces with a diameter of 100mm and a thickness of 10mm, plum arrangement, ensuring a bond area of ​​not less than 40%. Leave a 50mm wide vent on the side.
(2) Article sticking method: Apply a width of about 80mm adhesive on a standard board surface (600mm x 1200mm in size) with a serrated blade. The thickness of the adhesive is 5mm~8mm, and the distance between the adhesive strips is about 80mm. The adhesion area between the benzene board and the base wall is more than 70%.
(3) Note on adhesion: After the EPS board and XPS board have been wiped off the adhesive mortar, the board shall be immediately affixed on the base wall and then slid into place. When sticking, it should be lightly rubbed and evenly squeezed out of the mortar layer; in order to ensure the flatness of the board surface, a flattening operation with a length not less than 2m should be used at any time. The boards should be laid horizontally, and each board should be staggered by 1/2 board length. The operation of the pasteboard should be rapid, and the cement mortar must not have crusts before the cast plate is installed in place. The joints of the panels shall be flush and flat, and no mortar shall be applied on the sides of the panels, or the adhesive mortar shall be squeezed to avoid cracking. When sticking to the pipe, the board should be cut according to the site shape. The board must be firmly bonded to the wall with no looseness or stickiness. The gaps exceeding 2mm shall be tightly packed with corresponding slats, and the seam height difference greater than 1.5mm shall be smoothed with sandpaper or a dedicated sander. The uneven surface of the board can be sanded for at least 24 hours, and the movement of grinding the board surface should be a gentle circular motion. Scattered debris should be cleaned at any time during grinding.
4, mouth and feet
Narrow, alkali-resistant net fabrics should be pre-applied to the sides of the mouth, legs, windows and doors, and deformation joints of the building for system edge wrapping. EPS boards and XPS boards shall be cut with electric heating wires or other tools when the dimensions are non-standard or partially irregular. The cuts shall be perpendicular to the board surface. Use a plate with a minimum size of more than 300 mm at the corners of the entire wall.
What are the external wall insulation materials
1. YT inorganic active exterior wall insulation material
Insulation, heat insulation, fire protection, water resistance, light weight, anti-cracking, anti-drum, anti-shedding, life-span and other various properties of the wall to integrate the A-class non-flammable green wall thermal insulation energy-saving materials .
2, benzene board
The price of benzene board is the cheapest, the insulation effect is general, and it will absorb water and deform. After the insulation layer is done, some other waterproof measures are needed.
3, extruded plastic board
Extruded plate is much better than benzene plate, thermal conductivity is lower than benzene plate, and the price is slightly higher.
4, polyurethane
Is the best performance of the existing thermal insulation material, refrigerator insulation materials used in areas such as cold storage is polyurethane, thermal conductivity is far lower than the benzene board and extruded board, basically half the thickness of the polyurethane insulation layer can reach benzene The insulation effect of the original thickness of the board and extruded board, but the price is much higher than the benzene board and the extruded board.
5, mineral wool
Rock (mineral) cotton and glass wool are sometimes collectively referred to as mineral wool. Glass wool and rock wool have many similarities in properties, but their feel is better than rock wool and can improve workers' working conditions. However, it is higher in price than rock wool.
6, polyphenylene particles heat preservation slurry
This type of insulation material has higher water absorption than other materials and must be used as a crack-resistant waterproof layer when used. The crack resistant waterproof protective layer material is composed of a crack-resistant cement mortar composite glass fiber net, which can effectively control the cracking of the protective layer for a long time.
Editor's summary: What about the external wall insulation practices and external wall insulation materials are introduced here, and I hope to be helpful to everyone. If you want to know more about yourself, you can follow the information on this site.
Exterior wall insulation practice
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