Replacing wooden window frames

To date, the replacement of wooden window frames with metal -plastic is massive in nature. And not surprisingly: such windows are comfortable, they maintain heat better and create additional sound insulation. Together with window frames, it is necessary to replace the slopes. Slopes are a system that closes the openings between the window and the facade. Its functions consist in sound insulation, sealing and reducing heat loss. Previously, slopes were made of plaster and paint, but this technology is not particularly reliable and durable. Today, masters offer to use foam, metal or plastic for slopes. The advantage of such slopes is: