Impervia good window, warranty sucks. to many fine prints. If not mistaken the window is mechanically fasten. Which gives it a not so good air infilteration rating and it has weeping holes. Any window has weeping holes means that water gets in their framing. which means water has to come out those weeping holes. Which means that tempature outside(hot or cold) can blow in your framing and into yor house. Look into a uipvc vinyl window with fiberglass reinforcement,and also are fuse welded on outside and inside(no weeping holes.

We have been replacing windows over the past two years and have had our local glass replacement business, which does windows and glass shower door installations, do the work. The second floor windows were done by a different installer who took too long and was a one-man operation. Each installer, we found, used windows manufactured by small operations -- one in Minnesota and one in Ohio. We've found that most replacement windows were manufactured the same way and looked very similar. The important factor was the installer, his/her skill, and knowledge about what they were doing. Our installer even replaced some interior trim in the kitchen. We removed the old wood windows which were original to our 1928 home with vinyl. Very happy with the results. So my point is to check with your local business and they will tell you who they use, give you an estimate, and references. Good luck!

The Craftsman style is very simple but very traditional. The position of the sash and the screen track is important and a sub-sill is recommended. The usual design of vinyl windows makes it difficult to emulate a traditional Craftsman window. The sash thickness is often too narrow for applied mullions (SDL) and in- between-the-glass is often only option which does not have a traditional appearance. The sash of a vinyl window is often set toward the outside with a projecting screen track that doesn't looks more like a storm window than a traditional window. Its important to see the section details to determine the position of the sash and if the upper glass is narrower than the lower one. In any event you will probably find the glass of a vinyl window is smaller for a given frame size. I would be looking at Marvin Integrity wood-ultrex fiberglass windows if appearance and longevity (or color) were important and add an Azek Historic Sill or equivalent. Okna Jamb Integrity Jamb

What else do you have available to you? Okna, Sunrise, Softlite, and Polaris are some of the best vinyl made. Of the 2 you mentioned my last resort assuming I could get none of the ones I mentioned, would be the Simonton. Never anything Pella.