Roofing Glossary

Roofing terms provided by: The Garland Company, Inc.®

Architectural – BUR | Cool Roofing – Elongation | ENERGY STAR – Flat Seam |

 LEED – Mechanical FinishesMechanically Curved – Oil Canning |

 Post Industrial Recycled Material – Scrim |

Standing Seam – Symmetrical PanelTensile Strength – Title 24 |

 Unlimited Thermal Movement – Wind Uplift


A steep slope system that is used for visual impact or aesthetics and typically requires a supporting deck with a minimum slope of 3:12. Architectural panels usually have low seam heights of 1 inch to 1-1/2″ inches and do not use sealant between seams. Due to the low seam height and no sealant in the seams, architectural panels shed water but are not watertight and therefore require an underlayment below the panels to create a watertight system.

Asymmetrical Panel

Asymmetrical panels have one leg of the standing seam panel different from the other so that these legs in adjacent panels may be joined without the use of a seam cap. These asymmetrical legs usually “snap” together in a male/female connection. Examples of Garland asymmetrical panels are R-Mer Loc and R-Mer Clad.


The built-up roof is a multi-layer roof system that consist of multiple plies of reinforcements laid in a waterproofing bitumen. The alternating plies of reinforcement and waterproofing bitumen provide redundancy to the roof system. The reinforcements on a BUR are typically fiberglass felts, which provide strength to the BUR. The waterproofing bitumen can be asphalt or coal tar. The BUR is surfaced with gravel or a fluid applied coating.

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