ROOF TYPES

Built-up

Merges layers of bitumen and bitumen saturated felts with asphalt. Multi-ply roof types include Built-up and Modified bitumen (MB).

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Single-ply

A flat roof covering option, that offers many performance benefits. Membranes used in this process include Thermoplastic and Thermoset.

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Panel

There are three general categories of metal roof systems: architectural metal panel, structural metal panel and metal shingle/shingle panels.

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Shingle

Shingles are considered steep slope roofing that include water shedding types of roof coverings installed on slopes exceeding 3:12 (14 degrees).

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Foam

Foam roofing has many advantages over traditional roofing methods. They are seamless, flexible, thermal and sustainable.

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Built-up

Built up: These roof systems are commonly referred to as 'tar and gravel' roofs. Built-up roofing (BUR) systems are generally composed of alternating layers of bitumen (asphalt, coal tar, or cold-applied adhesive) and roofing plies that create a finished membrane.

Modified Bitumen (MB): Polymer-modified roof membranes are composed of reinforcing fabrics that serve as carriers for the hot polymer-modified bitumen as it is manufactured into a roll material. The two types of modified bitumen membranes are SBS polymer-modified bitumen membranes and APP polymer-modified bitumen membranes. Generally, APP modifiers impart a 'plasticized' quality to asphalt and SBS modifiers impart a 'rubberized' quality to asphalt.

Solar Roofs (Photovoltaic systems)

Uses solar panels to convert sunlight into electricity. A system is made up of solar panels, a power converter, and the interconnections and mounting for the other components. In urban and suburban areas, photovoltaic arrays are commonly used on rooftops to supplement power use.

Cool Roof

Can deliver high solar reflectance and high thermal emittance. Cool roofs are mostly associated with white roofs; however, they come in a variety of colors and materials including metal roofing products that can be EnergyStar rated in dark colors.

Green Roof (Vegetative Roofs)

Is a roof system covered with vegetation and a growing medium, planted over a roofing or waterproofing membrane. The system may also include additional layers such as a root barrier, drainage and irrigation systems, and insulation

Single-Ply

Thermoplastic Roof Membranes: Thermoplastic materials are distinguished from thermoset materials in that there are no chemical crosslinking. These membranes can be repeatedly softened by heating or hardened by cooling. Thermoplastic membranes are typically seamed by heat welding with hot air or by solvent welding. The most common thermoplastic roof membranes are Polyvinyl Chloride (PVC) and Thermoplastic Olefin (TPO).

Thermoset roof membranes: Thermoset roof membranes incorporate principal polymers that are chemically cross-linked or vulcanized. Once the membrane is cured, they can only be bonded to similar materials with adhesives. The most common thermoset roof membrane is Ethylene Propylene Diene Terpolymer (EPDM).

Panel

Generally, architectural metal panel roof systems and metal shingle / shingle panels are water shedding and are intended for use on steep sloped roofs. Structural metal panel roof systems can be used on low slope roofs because of their water barrier characteristics. Metal panel / seam types are standing, batten, flat, bermuda, and shingled.

Shingle

Shingles are typically flat rectangular shapes laid in rows from the bottom edge of the roof upwards, with each successively higher row overlapping the joints of the row below. Shingles are made of various materials such as wood, slate, bitumen-soaked paper covered with aggregate (asphalt shingle), composite, or ceramic. The most common material type is asphalt, typically 12 inches wide by 36 inches long, produced in a single layer or two or more layers; the latter have a three dimensional appearance.

Foam

Spray polyurethane foam insulation (SPF) based roof systems are a two-component system. The first component is rigid, closed cell, spray polyurethane foam insulation, which is mixed in the spray gun and then applied to a substrate. The second component, the protective surfacing, is typically a spray applied elastomeric coating. Mineral granules or sand may be broadcast into a coating to provide increased surface durability and aesthetic value. The purpose of the surfacing is to provide weatherproofing, to protect the foam from UV exposure, and to provide protection from mechanical damage and assist with the fire-resistant characteristic of the roof system.