I am a dinosaur on this topic, but I don't favor double pane glass. I've seen way too many fog and fail prematurely. When you figure the extremely high cost of windows against their limited life, I question the "savings" on energy. I have taken many thousands of dollars worth of windows to the dump, to add to the large pile that is always there.
Even the best energy rated windows are only slightly better than nothing, compared to the rest of the house as a whole. Heresy, I know! I think good sealing sashes and installation detailing are a higher priority than R-value.
My personal choice is a high quality single pane with a good storm window. Traditional true divided lights will look much better in this configuration.
Very unscientific and old-farty. But I am uncomfortable putting 25 year components into a 500 year frame.
Anyone else have opinions on this, or shall I crawl back into my cave? :rolleyes:
Pete
