Joined: Fri Mar 11, 2005 3:43 pm Posts: 353 Location: Illinois
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Tough call. The most narrow frames are going to be aluminum but you want to avoid that. In a vinyl, the Sunrise hung sashes are slightly more narrow but do have very unattractive uneven sight lines. Their casements have slightly more narrow frames than others but a very poor structural Design Pressure rating and pretty nasty, raised fusion welds. You may want to look into the Marvin Ultrex products. Good Luck.
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