Matters needing attention in insulation joint construction?

Matters needing attention in thermal insulation joints are very important in thermal insulation construction. Matters needing attention are formulated in order to better solve practical problems, and the handling of every detail is very important. Zhong Da Consulting will explain the matters needing attention in insulation construction of insulation nodes for you.

People pay more and more attention to the external wall thermal insulation system in buildings, because it has strong thermal insulation and can ensure people's normal living temperature, especially in this winter.

(1) Tiling time. As mentioned above, the slow hydration of plastering slurry (cement-based) has aggravated the corrosion of grid cloth to Guangxi Qinglong Chemical Building Materials Co., Ltd., so it is best to delay the time for ceramic tiles to go to the wall.

In addition, according to the test, the drying time of plastering paste before tiling has a great influence on the deformation performance of the system. If the tiles are attached before the plaster mortar shrinks and deforms, the shrinkage of the plaster mortar will have an impact on the whole system, because the stiffness of the tiles almost prevents the shrinkage of the plaster mortar. If the tiles are pasted after the plastering mortar shrinks, the plastering mortar will expand due to the moisture in the tile binder, which can reduce the shrinkage deformation by nearly 50%.

At room temperature, the drying shrinkage time of cement-based plastering mortar is generally within 7d, so it is beneficial to properly maintain plastering mortar during this period and stick tiles after it is fully hydrated. In particular, try to avoid sticking tiles the next day after plastering.

(2) Tile pasting area. The back of ceramic tile must guarantee the actual pasting area of 100%. Leaving gaps will cause water vapor condensation and freeze-thaw damage, leading to peeling of tiles. During construction, the ceramic tile binder can be applied to the wall with a 6mm×6mm serrated plastering knife, and then the ceramic tile is kneaded into the binder for compaction. If necessary, remove it and check the slurry area on the back.

(3) Node processing. The so-called joints here mainly refer to the places where expansion joints, corners, doors and windows and other structures converge. The treatment of expansion joints is the same as that of facing system, and waterproof and thermal protection bridges should be considered here.

It is necessary to put forward the treatment of corner and the closing of doors and windows. Because the deformation value of the external insulation system in these parts is the largest, it is best to use jointing agent with high elasticity for brick joints in these parts. At the same time, brick joints should be set at the corner outside the wall, or special corner bricks should be used.

(4) Joint treatment with other decorative materials. Cracks are most likely to occur at the junction of two materials. It should be noted that the design of long and narrow mortar decorative partitions between large-area tiles is easy to produce cracks, while the small-area tiles will not produce cracks compared with mortar decoration, because the deformation value increases with the increase of tile pasting area.

It should be pointed out that the safety and durability of ceramic tiles are questioned at the same time because they are directly attached to the external wall as decorative surfaces. At present, some cities in China have clearly stipulated to restrict the use of high-rise buildings, which is undoubtedly more necessary for the external insulation system of external walls.

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