"We compared Suburban's high efficiency windows with others of comparable quality and found they were competitively priced. Then we checked with a number of former customers of Suburban and found... » more
- Don and Mary Schaefer of Bettendorf, Iowa


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Substrate

The base or core material in an assembly of parts. In sills, the full length wood or composite part of the sill, visible only from the bottom side, or ends.

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