MASTERCRAFT doors carry an industry-leading lifetime warranty, and they are Energy Star Rated featuring a high-density polyurethane foam core, insulated glass (Savannah style), and aluminum adjustable no-rot sill.  These are GREAT DOORS offered at a great price from Menards!  I have a flat rate for entry door installation, which includes insulation, 100% silicone caulk seal, and reuse of existing interior trim.  Give me a shout for details! 419-212-3200