In Iran, metal frames are used for various reasons. One of these reasons is the lack of familiarity with prefabricated frames, especially Polywood frames with many benefits. After recognizing Polywood frames, the consumer is very interested in using them. However, due to the installation of metal frames, re-installation of the Polywood frame will not have economic justification. The WeDoor company succeeded in producing a Polywood metal frame cover with the creativity of the technical and engineering group. That after installing it on metal frames, the appearance of the frame will be the same as Polywood frames. This issue, in addition to the beauty of the space used, will also cause consumer satisfaction