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About drainage of doors and windows

About drainage of doors and windows

Do windows also need to drain? Of course! Even the most traditional doors and windows have a basic drainage design.

In the aluminum door and window structure, although various sealing systems are installed on the profile and glass, the tiny gap at the interface is inevitable.

When it rains, the rainwater on the glass constantly seeps into the gaps. If the drainage system is not perfect, the accumulated rainwater will affect the service life of the glass and profiles, and it will pour into the room when the rain is too heavy.

1. Drainage design of system doors and windows

Principle of equal pressure

Whether the drainage of doors and windows is good, reasonable design is the prerequisite, and a systematic, complete and reliable independent regional drainage channel is the key.

When the air pressure in the isobaric chamber is greater than or equal to the outdoors, the accumulated water is quickly discharged to the outdoors through the drainage holes;

When the air pressure in the isobaric chamber is lower than the outdoors, the drainage of rainwater will be blocked, and the accumulated water will stay;

When the stagnant water rises to the gap of the inner sealing band, the function of the isobar will fail, and the watertightness of the window will also fail.

In fact, the drainage performance of the doors and windows of the system is closely related to the sealing system. Only when watertight, airtight and drainage channel designs are done at the same time, can the drainage problem of doors and windows be solved in a true sense.

2. Drainage method of system doors and windows


The drainage holes of the original system doors and windows were exposed outside the window frame, which was called positive drainage in the industry, or Ming drainage.

Insufficient horizontal drainage pressure and incomplete drainage; direct strong winds will risk rainwater backflow; openings in window frames affect the appearance of external windows; plastic covers covering the openings may age and fall off.

Due to the above-mentioned problems and hidden dangers, hidden drainage, also called vertical drainage, came into being. The position of the drainage hole is transferred from the side of the window frame to the bottom of the window frame, avoiding many problems of positive drainage:

The drainage direction is vertically downward, and the drainage is more rapid and smooth; avoid strong winds blowing directly on the drainage holes, reducing the risk of rainwater backflow; the hidden drainage hole design greatly improves the appearance of the whole window.

Floor drain

This drainage method combines the advantages of the above two methods, while maximizing the strengths and avoiding weaknesses, improving the drainage performance of doors and windows in terms of structure, material, and practicality, providing users with a better experience.

3. Drainage method of system doors and windows

Which way is more suitable?

From the perspective of user experience, floor drain waterproof is definitely the first choice!

Because it minimizes the problems of blocked drainage, pressure release of equal pressure chambers, and anti-insect and wind flocculation, it can also reduce the direct conduction of indoor and outdoor hot and cold air, and it is also an improvement of the insulation performance of doors and windows.

Of course, the choice of this type of drainage also has to bear the corresponding costs, and it is certain that it is absolutely value for money.

If your area does not have many typhoons or strong winds, and the residential floor is below the 6th floor, hidden drainage is also a good choice.

Life is a deep learning. What can enter people’s lives must be able to withstand the test, whether it is the people around you or an inconspicuous window at home.

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