i work in the industry and betterbilt is a poor window at a cheap price especially the capital series jeld wen makes probably the best "vinyl window" but all vinyl will be phased out in the next 5 years much like aluminum windows dues to its extreme expansion and contraction marvins ultrex is what all manufacuerers are going to use in the near future both jeld wen and anderson are currently are in the r & d process
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