Aluminum windows and doors profilesused in the construction may the common problem -- water linkage. With the large-scale development of residential buildings, the size of the aluminum windows and doors profiles become larger and larger, resulting in more and more obvious rainwater leakage, which has a great impact on the quality of construction, causing huge economic losses. Thus, it reminds us to focus on researching the performance of aluminum windows and doors profiles in waterproof, and find ways to strengthen waterproof effectively.
Firstly, we have to know that what the main causes of water leakage are in Part (1), and then talk about the solutions accordingly in Part (2).
1. Main causes analysis on water leakage of aluminum windows and doors profiles
A. Defects in the structure ofaluminum windows and doors profiles in the design process.
the main structure strength of windows and doors profiles can not meet the local wind pressure requirements of the indicators, such as small cross-section and wall thickness, so the rod, hardware accessories, seals and bonding materials of aluminum windows and doors profiles under the normal wind load, has problems of serious plastic deformation cracking, damaging the sealing performance of aluminum windows and doors profiles. The reason is that the product is failed to accurately calculate the strength and design of the product, and did not pass the physical resistance test by the wind pressure before installation.
2. Unreasonable waterproof structure design of aluminum windows and doors profiles with little profiles section waterproof seal level and no multiple drainage channels.
The rain under both the indoor and outdoor wind pressure difference is easy to enter the aluminum windows and doors profiles and into the room. However, the waterinaluminum windows and doors profiles can not come out through the drainage system smoothly outdoors and stay in the aluminum windows and doors profiles, resulting in water leakage.
3. Poor processing and installation
In the site installation of the Aluminum windows and doors profiles, the improper assembly size will cause staggered mutual overlaps or insufficient overlapping size; the corner seam of frame is not sealed; the insufficient pressure cause a gap left; the fastening screws used to fix the door frames are not sealed with glue; the surface of the sealing parts is not cleaned when sealed with sealant.
4. Unqualified accessories, such as sealant, tape and hardware accessories
For example, the used-out or counterfeit sealant has poor anti-displacement ability, and is easy to crack; the hard sealant is prone to aging and break off; poor hardware accessories can not afford to open often resulting in break or deformation, leading to water leakage.
5. Failed tightly sealed connection parts between aluminum outer window frame and the wall hole
The seam between the frame and the wall hole is too large or too small, so that aluminum windows and doors profiles are difficult to fix, the existing seam is prone to cracks, which is often caused by construction units.
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