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Misconceptions about selecting and using exterior cladding panels
 Nov 29, 2022|View:198

The exterior wall panel is a wall insulation and decoration system placed on the surface of the building, which has a long insulation effect, less thermal bridging effect, and good energy-saving insulation effect. As the main part of the decoration, energy saving, and building integration, the exterior wall panel is fixed by a similar compatible pasting system and cooperation with the main body's concave and convex fixing system. With the long-term cooperation of air layer treatment systems, air layer treatment systems, and waterproof systems, the overall aesthetic effect of integration with energy saving, decoration, and the building is formed. Therefore, it has received more and more attention in the field of building insulation. However, many people have a certain degree of misunderstanding about exterior wall panel products.

exterior cladding panels

1. Exterior wall panel external insulation anti-cracking mechanism: flexible deformation layer by gradual layer change, layer by layer release stress.

Generally speaking, this statement is correct, but this premise is not valid for the commonly used external insulation system.

(1) Each structural layer's exterior wall panel insulation is a whole with layers inside and outside. It is impossible to cut apart and separate, and it is impossible to accept external impact or various stress changes in nature in the same environment.

(2) As the constituent materials of the system, the deformation indexes set are also inconsistent, such as the elastic modulus of the insulation layer, the compression-folding ratio of the plaster mortar, and the flexible deformation of the flexible putty.

2. No cavity is the best choice for constructing an external insulation system for exterior cladding panels.

The exterior wall panel external insulation system should be mainly a cavity-free system. Some people believe that, compared with the system with the cavity, its ability to resist wind pressure, especially negative wind pressure, is stronger and has higher safety and reliability. However, when the material with a high water absorption rate is used as the full adhesive material of the insulation layer and the material of the plastering and leveling layer, the surface of the external wall is crack-free. Still, the full adhesive layer and the plastering and leveling layer are very wet and have water precipitation.

So the insulation board should use the point frame combination of bonding, which can effectively prevent the wind pressure on the external insulation system damage and also form a vapor barrier to prevent the insulation board's long time moisture. In this sense, it can't be determined subjectively simply from the perspective of wind pressure damage. Choose no cavity system structure.

3. The exterior wall panel will not have the problem of air bubbles.

Many think the wall and floor tile bubbles are due to the wall and floor tile pastes leaving too much seam or because the building materials themselves have bubble problems. At the same time, the exterior cladding panels will not appear these problems. But in fact, the exterior wall panel will also appear bubbles. Generally speaking, too much moisture penetration into the insulation material will lead to gaps between the filler and the wall and the formation of a bubble problem.

Solution: exterior cladding panels must leave a gap when pasting to avoid air entering the wall. Also, pay attention to the grass-roots surface must be dry and flat.

4. exterior cladding panels need to be thicker to achieve the insulation effect.

With various insulation boards on the market, the thickness of the exterior wall board is getting thicker and thicker. Many people think that the higher the thickness, the better the thermal insulation performance, but this is only a surface layer of film. Exterior cladding panels also need a certain degree of water absorption and corrosion. If these two points are unavailable, then the exterior cladding panels are also unavailable to achieve the insulation effect.

These are the four common misunderstandings of exterior cladding panels. If you need more detailed information, welcome to contact us!