DER Building has a unique, individualized, systematic and refined "18-work" system in the industry.

1. Seiko measurement: DER Building professional surveyors observe the millimeter level measurement standard strictly.

2.Custom design:  According to the customized needs of customers, customized-shaped doors and windows are  designed by DER Building designers.

3. Custom craft: According to people's customized door and window product performance requirements, adjust the process to determine the best process parameters for doors and windows.

4. Profile inspection: According to the process requirements, strict compliance with the 360 ° selection criteria, testing profiles.

5. Frame and sash cutting: Double-head cutting saw cutting, accurate proofreading。

6. Medium end face punching： DER Building digital precision section milling machine, 90° uniform speed milling.

7. Hole punching：Digital precision punching and milling operations, micro-stage punching and milling of the frame material groove and connecting hole.

8. Middle fastening： The splicing of the splicing joint ensures a firm and strong rigidity and tightness.

9. Framed corner： The angle of the group angle machine and the window frame sash are respectively set, and the micrometer step is controlled.

10. Injection time delay detection：Special sealant injection glue, after 24 hours, the glue is tested to ensure the quality.

11. Seal assembly： Continuous assembly of pressure-sensitive adhesive strips, crimping strips, elastic sealants and other seals.

12. Hardware assembly： All imported hardware accessories are luxuriously assembled to ensure a service life of more than 40 years.

13. Glass assembly： The glass pad is assembled with the point-shaped strip to accurately seal the glue.

14. Finished product debugging： Various debugging of the finished product details and performance indicators of doors and windows。

15. Process quality inspection： Every door and window must meet the testing standards and strictly control the quality of the products.

16. Clean packaging：Clean the customized door and window products completely and complete the packaging process.

17. Custom maintenance: According to their own needs, users choose customized cycle maintenance and careful care.

18. If you need, DER Building offers installation.