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The replacement windows for Contractor 1 offers Thermal Industries 500, 530 and 700 series. It would probably be 530, with the information I have seen but maybe 500 for attic. I also could not find any info on 700. Contractor 2 uses Simonton 5500, but he did mention Caswell for attic. Contractor 3 uses ViWinco, but have not received information on which window (Edgemont or Stafford, or Cambridge) he would use, but did indicate would meet U-factor and SHGC of 0.30 or below, which makes me suspicious about the guy. Do know of another contractor who uses ViWinco, but have not contacted yet.
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