Vinyl White Roof Cools Hawaiian Beachfront Hotel
SITUATION: The roof of the Mauna Kea Beach Hotel on the Big Island of Hawaii was failing. High winds, stifling humidity, pounding rain and penetration sunshine had taken its toll on the existing roof, and Mauna Kea management needed to find a suitable roofing material that would not only stand up to Hawaiian weather and ease the hotel's excessive cooling costs, but also reduce unnecessary waste in the process.
Vinyl as the Sustainable Roofing Solution
Mauna Kea Beach Hotel on the Big Island of Hawaii opted to replace its failing built-up roof with IB Roof Systems' 80 mil vinyl roof membrane. In the IB membrane, the Mauna Kea found everything it needed to protect the hotel. The hotel was especially pleased with the white roof's inherent ability to repel heat. The vinyl membrane was also energy-efficient – with so much of the solar energy directed at the roof reflected, the hotel enjoys the lower costs of a heating and cooling system that runs more efficiently.
Vinyl also stands up to climate changes quite capably. Atmospheric cycles that shift from hot and humid to more chilly aren't a cause of concern. The membrane accommodates cyclical contraction and expansion without damage over many seasons.
Another advantage to the hotel was the ease of installing the lightweight membrane. It was applied in an adhered application atop the pre-existing roofing material, eliminating the need to dispose of construction debris in an environment that cannot afford the burden of unnecessary waste.
To get a strong attachment, poly-iso insulation board was laid over the existing insulation, secured by adhesive. The insulation achieved the necessary R value and isolated the new membrane from the built-up roof's tar and gravel components. With the insulation in place, strips of adhesive were applied to fit the 6-foot single-ply membrane rolls, and the seams hot-welded to create a permanent seal.
The white vinyl membrane satisfied all of the factors the Mauna Kea took into consideration in its purchasing decision. The roof was aesthetically pleasing; it effectively lowered heating and cooling costs; and the installation was easy and did not put an undue burden on the environment.
Cool Roofing Codes, Programs & Standard
Additional Reading on Cool Roofing
- Sustainable Roofing: Presentation to the Cool Roof Rating Council by Target Corporation and Sika Sarnafil [1.49 MB]
- Trading Off Cool Roofs for Insulation [608 KB]
- Benefits of Cool Roofs on Commercial Buildings [1.65 MB]
- Do Cool Roofs Fit in Cool Climates?
- Measured Energy Savings and Demand Reduction from a Reflective Roof Membrane on a Large Retail Store in Austin [2.63 MB]
- Mitigating New York City's Heat Island with Urban Forestry, Living Roofs and Light Surfaces [1.82 MB]
- Vinyl Roofing as a Cool Roofing Solution [55 KB]
- Radiative Forcing and Temperature Response to Changes in Urban Albedos and Associated CO