Upgrading ordinary windows and doors to system windows and doors usually need to consider the replacement of the following parts:
1. **Profile part**
- **Frame profiles**: ordinary doors and windows may not have a bridge-breaking design if they are made of aluminium alloy profiles. System windows and doors are mostly made of broken-bridge aluminium profiles, which have heat-insulating strips in the middle to effectively stop heat conduction. When upgrading, you need to replace the original ordinary profile frame with a bridge-breaking aluminium profile frame. For example, the original single-chamber aluminium alloy profile may have to be replaced with a bridge-breaking aluminium profile with a multi-chamber structure, which provides better sound insulation, heat insulation and thermal insulation.
- **Fan profiles**: The profiles of door and window fans are also critical. The fan profiles of system windows and doors usually work closely with the frame profiles and are more delicate in sealing design. For example, some system doors and windows fan profiles will come with special sealing tape grooves, which can better install and fix the sealing tape, and enhance the air- and water-tight performance. Therefore, ordinary door and window fan profiles may also need to be replaced with fan profiles that match the system door and window frames.
2. **Hardware fittings**
- **Hinges or hinges**: The hinges or hinges of ordinary doors and windows may not be as good as those of system doors and windows in terms of load-bearing capacity and durability. Hinges or hinges of system doors and windows usually have better load-bearing capacity, which can ensure that the doors and windows will not sag during long-term use. Moreover, they are smoother during opening and closing, providing a better experience. When upgrading, you need to replace the old hinges or hinges with higher quality hardware for system doors and windows.
- **Handles**: The handles of system doors and windows are not only more delicate in appearance, but also more powerful in function. For example, some system doors and windows handle with multi-point lock function, can better enhance the anti-theft performance of doors and windows. Handles of ordinary windows and doors with a single function may need to be replaced with system window and door handles with better anti-theft, sealing and other functions.
- **Transmission device (if any)**: For some doors and windows with complex opening methods, such as inward opening and inverting windows, system doors and windows will have a more sophisticated transmission device. This device ensures the stability and smoothness of the window or door in different opening modes. If ordinary windows and doors have similar opening modes, the original transmission may need to be replaced with that of the system windows and doors.
3. **Sealing materials**
- **Adhesive strip**: System doors and windows usually use high-quality EPDM sealing tape. This rubber strip has good elasticity, aging resistance and weather resistance. Ordinary doors and windows may use ordinary rubber or lower quality sealing materials. When upgrading, replace the original sealing tape with high-quality EPDM rubber sealing tape, and pay attention to the way the tape is installed to ensure that a good sealing environment can be formed when the doors and windows are closed, and the air- and water-tightness can be effectively improved.
