Leakage of glass curtain wall

Three sealing lines of unitized curtain wall
(1) Dust tight line.
A sealing line designed to prevent dust is generally realized by overlapping strips of adjacent units to prevent dust and water. This sealing line can be dispensed with in the south.
(2 watertight lines.
It is an important defense line of the unit curtain wall. A small amount of water leakage on the surface of the curtain wall can cross this line and enter the isobaric cavity of the unit curtain wall. Through reasonable structural design, the water entering the isobaric cavity will be discharged in an organized way, without the ability to continue to enter the room, so as to achieve the purpose of water blocking. Sometimes in order to improve the watertight performance of curtain wall, it is possible to set up multiple watertight lines at the same time.
(3) airtight line.
It is also an important line of defense for the unit curtain wall. Because the isobaric cavity between the watertight line and the airtight line is basically connected to the outside (sometimes sponge is placed on the connected hole to prevent dust), the watertight line cannot prevent the infiltration of air, and the task of preventing air infiltration is completed by the last line of defense - the airtight line.
Waterproof mechanism analysis of unit curtain wall
On the surface of the curtain wall structure, in order to use the principle of rain curtain to waterproof, the design makes the pressure of the isobaric chamber equal to or close to the outdoor pressure, that is, the wind pressure on both sides of the watertight line is basically equal, eliminating or reducing the effect of wind pressure, so that the water does not pass through or rarely through the dust-tight line and watertight line into the isobaric chamber.
On both sides of the airtight line, cracks and effects are also inevitable. In order to achieve the purpose of no leakage, it is necessary to make water less than the airtight line and eliminate it
The factor of water leakage in the three elements, because the water through the dust tight line and water tight line is little or no, coupled with reasonable organization drainage, there is no water to the air tight line, there is no water around the air tight line gap, there will be no leakage, so that the curtain wall building has good waterproof ability to insert parts.
The weak link of unit curtain wall waterproof is the "+" word seam of four units, which is the key to the success of unit curtain wall waterproof
The more successful solutions are horizontal slip and "+" cross seal structure.

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