Terminal 91 Building C-173
Roof Overlay- Construction
Funds Request
Item No.: 4b
Date: January 24, 2017
Building C-173 Roof Overlay
Existing C-173 Roof Approximately 29 Years Old
Building C-173
2
Existing Deteriorated Roof Elements
Existing Deteriorated Roof Elements
Underside rusted canopy area
Rusted underside of roof panel
Hole previously repaired with coating
Previous repair of metal roof at rusted location
Mechanical room penetrations
Hole previously repaired with coating
3
• Increase Insulation Value
• Utilize Reflective Overlay Material
• Recycling of Demolished Materials
• Durable Roof System that can last 30 years as specified
• Selecting materials with limited toxicity and GHG
emissions.
Sustainable Elements
Incorporate Sustainable Elements
4
Project Alternatives
Project Alternatives Considered
Alternatives Description Cost
Implications
Solar
Alternative 1
• Maintain Status Quo.
• Continue to pay maintenance cost. (Approximately $9.8K/yr)
$9.8K
Alternative 2 • Coat Roof with roll-on Coating System (10 year life)
• Add Fall protection and Security ladders
• Repeat roll-on coating again in 10 years
$2.14M
Alternative 3
• Replace Roof with PVC membrane (30 year life)
• Add Fall protection and Security ladders
• Install Thin Film solar panels and structurally upgrade the building
$1.56M
$5.53M
Alternative 4
• Replace Roof with PVC membrane (30 year life)
• Add Fall protection and Security ladders
• This is the recommended alternative
$1.56M
5
Next Steps
• Complete Design 4
th
Quarter 2016
• Request Construction Authorization 1
st
Quarter 2017
• Construction Starts 2
nd
Quarter 2017
• Construction Complete 4
th
Quarter 2017
Roof Overlay Project Schedule
6
Any Questions
Any Questions?
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