Construct roofing and HVAC improvements to the historic Mount Baker Theatre, including replacement of built-up roofing (BUR) across six roof areas with a new TPO membrane assembly, an aged TPO membrane assembly, and HVAC unit, new continuous insulation and vertical flashings, along with necessary adjustments to rooftop equipment, piping, conduits, and mechanical attic or parapet metal siding, hazardous materials abatement (asbestos), salvaging and installing access ladders, providing new access ladder, new fall protection at select areas, capping an existing chimney and demolishing the existing fly tower smoke vents to infill the concrete roof deck. Alt. Bid #1 Replace Mammoth Unit Like for Like and Replace TPO at Roof Area 10, Alt. Bid #2 Replace Mammoth Unit with Heat Pump and Replace TPO at Roof Area 10, Alt. Bid #3 Replace Roof Areas 7A and 7B with new TPO Membrane.