CoatingsPro Magazine Supplements

ROOF 2018

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COATINGSPRO ROOF COATINGS 2018 9 Other 'Green' Benefits Besides not fi lling landfi lls, many roof coatings and SPF systems are also attractive economically and environmen- tally because of the "cool roof " concept. e U.S. Department of Energy defi nes a cool roof as one that has been designed to refl ect more sunlight and absorb less heat than a standard roof, thus reducing the strain on power and electric grids for air conditioning. Another key consideration for highly populated areas is the "urban heat island " eff ect, in which dark surfaces absorb signifi cantly more solar radiation and cause urban concentra- tions of roads and buildings to heat more than suburban and rural areas. us, a suitable roof coating or SPF system using cool roof materials, often light-colored, can serve to benefi t an entire community. "Cool roof standards have been in existence for more than 10 years in California, and they've expanded to several other states and cities over the past few years," said Kemper's Arnold. "In response, there are over 700 white coating products as rated by the Cool Roof Rating Council. White coatings can address the heat issues to help the building HVAC [heating, ventilation, and air conditioning] systems operate more effi ciently and reduce the urban heat island eff ect." Enhanced legislative requirements for both cool roofs and the materials themselves are helping to further drive the trend. " ere are growing legislative rules on VOCs, largely led by California," said Icynene-Lapolla's Kramer. "In California, you have both VOC limits and Title 24 rules with refl ectiv- ity and emissivity standards. On the chemical side, some of the advancements in chemistry in the curing compo- nents and the strengths of the technologies are much more effi cient and eff ective. e technology has stepped up at an important time, now that the market is moving toward low-VOC products." Outdoor Considerations Exposure to the elements is usually a leading concern in the planning process for roofi ng jobs that are almost always outdoors and at heights. "Roof coating is a seasonal project," said Kemper's Arnold. " ere's defi nitely time of year considerations. It's only going to be spring, summer, and fall in most places. It's not really going to be a winter application." Even if the time of year is suitable, a particular day might not be. For example, hot weather in the middle of summer days often means even hotter substrate temperatures, which could lead to fl ash curing upon the material that is making contact with the roof 's surface. " e higher your substrate temperature is, the more reactive the substrate is," said Murphy Mahaff ey, director of international sales at Polyurethane Machinery Corp. (PMC). On the other hand, wet conditions could keep certain products from adhering properly. " e coating needs to reach a rainproof dryness," explained Kemper's Arnold. "You have to look out for any kind of morning dew. Or it could be an imminent threat of rain that could shut you down for a day or reduce your applica- tion window." Higher Challenges Once a project is awarded and an appropriate schedule has been developed, contractors at the jobsite should fi rst account for the uniqueness of roofi ng jobs relative to other applica- tions. By doing so, crews can improve their jobsite safety, effi ciency, and productivity. "Roofi ng can be dangerous," said Icynene-Lapolla's Kramer. " ere's a lot of hazards associated with roofi ng. Unfortunately, people are injured or killed every year in roofi ng jobs. ere's a signifi cant safety component to it." e fi rst planning consideration usually involves access- ing the jobsite, which can be many stories high. is means developing a logistics plan for workers, materials, and equip- ment to all reach the roof in a safe manner. is helps to protect both the crew and anyone else in the vicinity of the jobsite. "Roofi ng is a unique application, as far as where you are and where the equipment needs to be," said PMC's Mahaff ey. " ese guys typically have a very solid safety plan before they ever arrive. It will include everything about where the equip- ment is staged, sometimes down on a truck on the ground, but sometimes it needs to be hoisted onto the roof. And then there's another host of things to consider as far as staging. You need to have a plan before you ever set up your equip- ment on where everything is going to be set up and what the accessibility is like." Providers such as BrandSafway and Safespan specialize in a variety of scaff olding, rigging, and staging solutions. Many asset owners are choosing to restore their roofing systems rather than doing a complete replacement when viable. Coatings, such as this one from National Coatings, can be a "green" option. Roofing Projects

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