Vinyl Siding, Vinyl Siding Installation    

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Lap:  The part of the siding material that overlaps a section of adjacent material that allows for expansion or contraction of the siding material and to provide a waterproof covering for the home
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Lug or Crimp:  Raised tabs or “ears” on a siding panel, which is made by a snap lock punch used for locking the panel into place when the nailing hem has been removed.