Duro-Last

Grell Roofing Roofing Systems

Duro-Last Is The Perfect Fit For Your Building CUSTOM PREFABRICATED FOR EVERY BUILDING Every Duro-Last project is prefabricated to fit every building roof precisely. By performing 80-85% of membrane seaming in our controlled factory environment, Duro-Last reduces the potential for rooftop installation errors and leaks that can occur with other systems. Also, custom fabricated stacks and curb flashings eliminate nearly 100% of rooftop labor from the most critical roof areas – transitions and changes of plane. The Duro-Last roofing system is perfect for any new or retrofit project, on building with flat roofs or low-sloped roofs. DURABLE The Duro-Last single-ply roofing system is resistant to fire, chemicals, grease, high winds and punctures, and easily accommodates wide temperature extremes. Duro-Last’s custom flashing resists ponding water and helps solve roof problems before they happen. Once installed, a Duro-Last roof is watertight and virtually maintenance-free. INSTALLED WITHOUT DISRUPTING BUILDING OPERATIONS Installation is quiet and safe, without loud machinery, hazardous materials, noxious fumes, hot tar, …

Flat Roofs & Low-Sloped Roofs

Grell Roofing Roofing Systems

Low-Sloped Roofs & Flat Roofing System The Duro-Last single-ply flat roofing system is ideal for any low sloped or flat roof design. Since 1978, over a billion square feet of Duro-Last membrane have been installed on buildings of all types. The Duro-Last roofing system is: Precision-fabricated to fit your building’s low-sloped or flat roof. Every Duro-Last roof is manufactured to exact size in our controlled factory environment. This eliminates up to 85% of rooftop installation seaming and ensures an excellent fit, delivering worry-free, leak-proof, long-term protection for any low-sloped or flat roof design. Energy efficient. The Duro-Last white membrane has the highest retained reflectivity of any single-ply memnbrane rated by the EPA’s ENERGY STAR® Roof Products Program, saving significant energy and money for facilities with low-sloped and flat roofs throughout North America. Durable. The Duro-Last roofing system is resistant to fire, chemicals, grease, high winds, and punctures, and easily accommodates wide temperature extremes. Installed by authorized contractors. A Duro-Last installation …

Black Roofs vs. White Roofs

Grell Roofing Roofing Systems

This information illustrates that there are many misconceptions when it comes to the benefits of black roofs vs. white roofs. Q: I live in a northern tier climate, and have heard that any summertime energy savings I realize with a white roof will be offset by winter heat loss. Doesn’t a black roof help me save money on heating costs? A: In the northern tier of the United States, one might think that a black roof would provide a winter heating benefit to building owners. However, there are several factors that make any potential heat gain relatively immaterial: The laws of physics dictate that hot air will always rise. Thus, any heat that is transferred to the interior of a building structure from the outside will remain at the top of the structure, providing minimal heat savings. In all parts of North America, there are fewer hours of sunlight to affect energy costs. In fact, in some areas, there is …