“We manufacture several window replacement parts. For the most part the pieces are for casement windows. We have done several double hung windows but do not keep any inventory on hand like we do for the casement windows. It will work best if you can send us the old sash so we can copy it. If you know the brand and series of window that you have, it is good for us to know that to keep records of what we have done. The next time it comes up, we know what to do.
We do not make either an aluminum or vinyl clad sash or window, but we make a PVC clad sash. The exterior of the sash is solid PVC and the interior of the sash is raw wood. It is completely stainable. The only downside to this approach is that if the exterior of the sash is to be painted a darker color, it must be painted with Sherwin-Williams “Vinyl Safe®” line of paints. Azek® has approved this paint for their product. If your Azek® product is finished with S-W Vinyl Safe® paint, the Azek® warranty will not be affected.