Item No.: 4b
Date:
January 24, 2017

Terminal 91 Building C-173
Roof Overlay- Construction
Funds Request

Building C-173 Roof Overlay
Building C-173

Existing C-173 Roof Approximately 29 Years Old
2

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

Hole previously repaired with coating

Mechanical room penetrations

Existing Deteriorated Roof Elements
3

Incorporate Sustainable Elements
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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
4

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

• Replace Roof with PVC membrane (30 year life)
• Add Fall protection and Security ladders
• This is the recommended alternative

$1.56M

Alternative 4

$5.53M

Project Alternatives
5

Next Steps
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Complete Design
Request Construction Authorization
Construction Starts
Construction Complete

4th Quarter 2016
1st Quarter 2017
2nd Quarter 2017
4th Quarter 2017

Roof Overlay Project Schedule
6

Any Questions?

Any Questions
7