| K & C Industries Inc (Franklin, MA)
|
| K & R Mfg (Albuquerque, NM)
|
| Kalbfleisch Mold Co Inc (Huntley, IL)
|
| Karpen Steel Products Inc (Weaverville, NC)
|
| Keefe Custom Woodwork (Towanda, IL)
|
| Keith Kalna Custom Trim (West Palm Beach, FL)
|
| Kelly Mill Shutters (Cumming, GA)
|
| Kelly Window Systems Inc (Farmingdale, NY)
|
| Kestrel Manufacturing (Pottstown, PA)
|
| Keystone Industries Window Inc (New Castle, PA)
|
| Kinco Limited Windows (Jacksonville, FL)
|
| Kinro Manufacturing (Liberty, NC)
|
| Kinro Manufacturing (Goshen, IN)
|
| Kinro Manufacturing (Fontana, CA)
|
| Klein Aluminum Building Prods (Louisville, KY)
|
| Kml (Bayport, MN)
|
| Kolifrath Shutter Mfg (Pompano Beach, FL)
|
| Kramer Window Co (Maywood, IL)
|
| La Finestra (Miami, FL)
|
| Lakes Area Windows (Virginia, MN)
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| Lamar & Wallace Inc (Hyattsville, MD)
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| Lancaster Roofing & Siding (Reeds Spring, MO)
|
| Lato Products Co (Texarkana, AR)
|
| Lawrence Window & Siding Co (Prescott, AR)
|
| Lawson Industries (Holden, MO)
|
