Roof Membrane MakeUp

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Roof Membrane Make-Up

• Waterproofing Layer or Layers
• Reinforcement
• Surfacing

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Membrane Types
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Mineral Surfaced Built-UpRoofing System
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Smooth Surfaced Built-Up Roofing System
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Gravel Surfaced Built-Up Roofing System
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Advantages of Built-Up Roofing

• Long term History
• Low Cost
• Low Life Cycle Cost
• Easily Repaired
• Multiple Layers
• High Resistance to Punctures and Abuse
• Familiarity for Workers

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Disadvantages of Built-Up Roofing

• Roof Must be Accessible for Equipment and
  Material Loading
• Asphalt Odor

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APP Modified - Roof System
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Advantages of APP Modified Bitumen

• Decades of History
• Easily Repaired
• High Puncture and Abuse Resistance
• Good for Project with Poor Accessibility
• Low Relative cost for Small Projects and Tenant
  Improvements

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Disadvantages of APP Modified Bitumen

• Applied with Torch Fire Hazard
• Oil and Grease Intolerant
• Moderate Workmanship Concerns
• Snake-Oil Salesman

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Advantages of Thermoset EPDM

• Decades of History
• Easily Repaired
• Can be Installed Quickly with fewer Workers

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Disadvantages of Thermoset EPDM

• History of Seam Failure
• Oil and Grease Intolerant
• High Workmanship Concerns
• Less Worker Familiarity
• Less Tenant Familiarity

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Ballasted Insulation Single PlyRoofing System
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Mechanically Attached Insulated Single
Ply Roofing System
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Thermoplastic PVC

• Decades of History
• Heat Welded Seams
• Moderate Puncture Resistance
• Easily Repaired

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Advantages of Thermoplastic Polyolefins (TPOs)

• Heat Welded Seams
• Moderate Puncture Resistance
• Chemical Resistance
• Can be Installed Quickly

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Disadvantages of Thermoplastic Polyolefins (TPOs)

• High Workmanship Concerns
• Short History
• Low Worker Familiarity
• Low Tenant Familiarity