Harvey manufactures this style window with stainless steel rollers on the bottom of the sash. Most other companies call their style of this window a slider. Sliders do just that, slide vinyl on vinyl. Over time the two surfaces ware down from friction thus reducing the performance of the window. Since Harvey constructs their product with rollers, friction never becomes an issue. This job also required the removal of the original tile sill and the installation of new pine sills and skirts.

This is the original sliding window constructed with an aluminum frame. Notice the tile sill.

The original aluminum slider with tile sill.

New Harvey Vinyl Roller with new sill and skirt.