At this stage, the choices of doors and windows are becoming more and more diverse, and many families choose aluminum doors and windows with broken bridges. So, how to determine the airtightness of aluminum doors and windows with broken bridges?

tightness requirements

Corner sealing strip: The sealing strip should avoid corner splicing, and the sealing strip at the corner should be designed as a 90-degree integral rubber angle.

Frame fan sealing strip: Three sealing strips should be designed for the opening fan part, namely the main sealing strip, the fan edge edge strip and the frame edge edge strip.

Frame fan structure requirements

Group angle: Group angle is an important process related to the integrity of doors and windows.

Gluing process: In general, the corner code + wiping corner glue process should be used, and it is forbidden to extrude the window corners without plastering.

Glue injection process: Angle code + glue guide groove + glue injection hole + two-component glue injection + corner piece process can also be used for the corners to ensure the strength requirements of the corners and ensure that the finished doors and windows are not deformed and displaced after transportation and installation. Appear.

Door and window installation

Installation is also an important factor in determining whether doors and windows are sealed. Even for very good doors and windows, improper installation will seriously affect the sealing performance of doors and windows.

Anti-leakage requirements

The outer window must be provided with a drainage channel, a drainage outlet, and an exhaust hole (air pressure balance hole) to discharge the accumulated water in the window frame fan. A buckle cover should be provided on the outside of the drain to prevent strong winds from blowing rainwater and dust into the window sash.

The thermal insulation strip should adopt a C-shaped structure and be on the same level as the inner and outer aluminum profiles to avoid leakage and corrosion caused by the accumulation of water at the thermal insulation strip. At the same time, it can increase the length of the thermal insulation strip and improve the thermal performance.

Door and window opening size: The structure opening should not be reserved too large, so as to avoid the hidden leakage caused by the difficulty of blocking.

Recessed opening: For special reasons, such as the outer wall is a stone curtain wall, the reserved size of the opening is large. It is recommended that the structural opening should be a recessed opening, and the recessed opening should be poured at the same time as the concrete wall.

External window sills: For buildings whose exterior wall materials are paint, it is recommended to use metal window sills. The inner side of the metal window sill should be pressed into the window frame, and the outer side should protrude from the wall for dripping.

Window frame and structural opening: The window frame should be installed in the middle. If it is installed on the outside, it should be retracted 20mm inward to prevent structural construction errors from causing the window frame to be installed outside the structural skin and causing rainwater leakage.

In fact, as long as you know more about the relevant door and window information before purchasing, you will not take a detour. Through the brief introduction of the editor of Baydee uPVC Profiles, I believe you have understood it, and we will continue to share the knowledge of doors and windows in the future.