Standard features of each ReTreet include: Full-scale hand-crafted metal tree with tree house and circular base flange for installation on Metalscape supplied/customer-installed concrete foundation  Metal staircase for treehouse access Traditional trap door entrance in floor of tree house with keyed door handle Fully finished interior with coordinated trim and moldings custom manufactured by Knights Cabinets -  an Elko, NV cabinet maker with decades of experience  R-12 insulation allows year-round use Double-pane opening windows (screened) Weatherproof roof appropriate for exterior style Grounded lightning arrestor Operational front door for emergency exit  Removable panel (containing facade entry door)  for furniture installation/removal  Concealed conduit and outlet boxes for customer-provided 12V wiring Ductwork and floor register for customer-provided heating and air conditioning system Fully structural engineered tree for maximum 1/4" deflection at tree house under maximum loading A painted drywall interior is standard, but you may select from many types of wood wall paneling at no extra charge.