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Atlas Introduces New, Interactive LTTR Calculator
ATLANTA - Atlas Roofing® Corporation is pleased to offer its new, interactive LTTR Calculator, ready for use at www.greenzone.com. The sophisticated new calculator is easier to use and more functional. It gives users in all climate zones across North America instant access to polyiso roof insulation solutions that will enable them to reach any R-value requirement. The new LTTR Calculator enables contractors, specifiers, roofing consultants, building owners and others to easily design for a specific R-value, building code, or determine how to meet the ASHRAE 90.1 standard in specific climate zones. The LTTR Calculator helps determine the appropriate polyiso thicknesses and layers for virtually any roofing application.
To use the new, interactive LTTR Calculator, visitors to www.greenzone.com begin by selecting the climate zone where the project is located. The Greeenzone™ Meter shows the range of ASHRAE 90.1 Standards that could be adopted in different areas of the country based on that climate zone. The desired ASHRAE Standard and R-value for the project are then selected from drop-down menus and the user enters the square footage of the roof. Once all requirements are indicated, Atlas ACFoam® polyiso products are chosen and evaluated by dragging and dropping them onto a configurator. The configurator displays the exact R-values and ASHRAE Standards for the selected products. When the user adjusts the thickness of the ACFoam products or selects different ones, the corresponding R-Values and ASHRAE Standards are modified. Once the polyiso product configuration is assembled to specification on the LTTR Calculator, it can be saved to the system or as a PDF. Additionally, product specifications and detailed literature are available for all products and other resources related to building code adoption can be accessed through the LTTR Calculator portal.
LTTR is a scientific methodology for predicting Long-Term Thermal Resistance of polyiso (polyisocyanurate) insulation. Using LTTR, the R-value of a polyiso product is determined as a 15 year time-weighted average. During the last 20 years LTTR became the accepted standard among polyiso users and manufacturers, enabling more accurate predictions of the actual energy efficiency achieved in a building insulated with polyiso in a given climate zone.
Polyiso (polyisocyanurate) is the insulation of choice among commercial roofing contractors, roofing materials manufacturers, roof consultants and construction specifiers. Its combination of low installation cost and lifecycle payback makes it an economical choice for new construction or re-roof applications.. With certain high performance facers, Atlas polyiso can be used without a thermal barrier or cover board in many roof systems and its high temperature stability prevents melting when mopped with bitumen. Atlas ACFoam polyiso products are third-party QualityMark Certified through PIMA (Polyisocyanurate Insulation Manufacturers Association) and use blowing agents with Zero Ozone Depletion Potential (ODP) and Zero Global Warming Potential (GWP).
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