Case Study

Holiday Inn
Ballasted Roof

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Substrate: Single-Ply | TPO
System Type: Silicone
AP-1200, AP-5100, AP-5200 System Image

Project Description

This was a ballasted roof with multiple leaks coming from the penetrations and seams. Due to the design of the original roof system, the contractor worked on restoring this roof in stages as the rocks needed to be moved multiple times and finally be returned over the watertight liquid membrane system to complete the roof project.

This silicone monolithic system solved all of the Holiday Inn Manager’s concerns and protected the building and its occupants.

Surface Preparation

The contractor cleaned the roof with our AP-1200 Single-Ply Cleaner/Primer to prepare the roof for the liquid membrane system.

Seam & Penetration Repair

The seams and penetrations were reinforced with our AP-2200 Moisture Cure Polyurethane Mastic to protect these vulnerable areas.

System Coating Process

Once dry, a coat of AP-5100 Moisture Cure Polyurethane Coating was applied, providing a strong, waterproof, monolithic membrane. Finally, the roof was completed in a coat of AP-5200 Silicone Roof Coating.

System Benefits

  • 87% Reflectivity
  • Great Flexibility
  • Resists Ponding Water
  • Achieved Reflectivity – 87%
  • Project Cost Effectiveness
TPO Restored with AP-1200, AP-5100 & AP-5200 Silicone Finish Layer Diagram
Moved Ballast Rock & Reveal Dirty TPO

AP-1200 Single-Ply Rinseable Primer/Cleaner in 5 Gallon Bucket

TPO surface cleaned and prepared with AP-1200 Single-Ply Primer / Cleaner


Detail of roof penetration sealed with AP-2200 Moisture Cure Polyurethane Mastic
AP-2200 Moisture Cure Polyurethane Mastic in 1 Gallon Pail
Repairs & Fasteners Sealed with AP-2200 Moisture Cure Polyurethane Mastic

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