Unlimited Thermal Movement

All materials experience the stresses related to heating and cooling of the roof surface. In some cases, temperatures of a roof surface can vary by up to 200 degrees F throughout the course of a day. The term “unlimited thermal movement” describes designing a roof system to accommodate all of the expansion and contraction that a roof may experience throughout a 200 degree cycle. With a metal roof, this movement can be in the order of several inches. The Garland Standing Seam, one-piece clip design allows the metal roof panels to move freely through an unlimited range of expansion and contraction. Garland’s flat seam metal roof system, R-Mer Lite is also designed with the unlimited thermal movement concept.

UV Resistance

The ability of a roof top material to prevent degradation caused by exposure to Ultraviolet rays. Heat and UV are two primary causes of premature roof failure. UV rays cause the oils in a roofing membrane to dry out. These oils provide pliability and leads to the membrane cracking when they are dried out. The addition of unique polymer blends provides protection to the membrane from cracking by maintaining the membrane’s pliability. The resistance to UV degradation prevents membrane cracking which prolongs the waterproofing life of the membrane.

Wind Uplift

A wind uplift rating is not the miles per hour of wind speed a roof system can withstand, but rather, the negative pressure (pounds per square foot) that occurs when the inside air pressure of a building is greater than the air pressure outside the building. As wind passes over a building, there is a decrease in external air pressure on roof and some down wind surfaces. As this external decrease in air pressure occurs, there is a corresponding increase in air pressure differential between the inside and the outside of the building. As the internal air pressure tries to equalize itself with the external pressure, the resulting force, identified as wind uplift forces, attempts to lift the roof off the building. Most parts of North America require a 1-60 or 1-90 uplift resistance. Coastal regions and high wind areas may require additional uplift resistance.

Sources: The Garland Company, Inc.®

Standing Seam

Is a term used to describe the adjoining of two metal panels together with an upturned portion of the metal. The two panels are held together with concealed clips. The joinery raises the seam above the drainage plain. Standing seam systems are made out of metal, which makes the roof durable, 100% recyclable and very low maintenance.

Structural

A low slope system that can support their own weight without a deck. Structural panels usually have high seams 1-3/4″ to 3″ and can handle slopes as low as 1/4:12. The panels are watertight and can span long distances. Since a deck is usually not required a structural system can end up being a lower cost alternative than an architectural panel with a supporting roof deck.

Symmetrical Panel

A symmetrical panel design has both legs of the standing seam panel identical in size and shape. This is typically found in panel system where a cap is used to seam the panels together. Benefits of a symmetrical panel are easy replacement, and tighter curving radiuses.

sources: The Garland Company, Inc.®

Post Consumer Recycled Material

Post consumer recycled materials are those materials which have already served their initial purpose to a consumer and are then reclaimed rather than being discarded in traditional landfills. Common post consumer recycled materials include tires, aluminum cans, newspapers, plastic bottles and glass. Innovative companies are finding new ways to break down these materials and incorporate them into their processes. Post consumer waste is generally recognized as being more environmentally friendly because once materials reach the consumer they are more likely to end up in landfills.

Post Industrial Recycled Material

Post industrial recycled materials are those materials that have been recovered or otherwise diverted from the waste stream during the manufacturing process. This does not include used, reconditioned or remanufactured components.

Scrim

The reinforcing fabric that acts as a carrier for the polymer modified bitumen. The scrim contributes to performance characteristics of the finished product that include tensile strength, puncture resistance and fire resistance. The two primary fabrics for scrim include fiberglass and polyester. There is also a combination scrim which incorporates both of these fabrics.

sources: The Garland Company, Inc.®

LEED

The Leadership in Energy and Environmental Design (LEED) Green Building Rating System, developed by the U.S. Green Building Council (USGBC), is a third-party certification program and the nationally accepted benchmark for the design, construction and operation of high performance green buildings. LEED promotes a whole-building approach to sustainability by recognizing performance in five key areas of human and environmental health: sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality.