Sellers & Marquis Roofing Systems
Sellers & Marquis is a commercial roofing contractor serving the commercial health, retail and industrial construction industry with a variety of roof systems and design specifications that are unique to each project.
EPDM roofs are single-ply membranes where there is only one ply of roofing material, not multiple piles laminated together. EPDM has been in use on roofs in the United States since 1960. EPDM is a rubber material that ranges in thickness from .030" mil to .100" mil with the most common thicknesses being .045 mil and .060 mil.
There are three standard application procedures for EPDM:
1. Fully adhered, which uses water or solvent based adhesives to adhere the rubber
to the substrate.
2. Mechanically fastened, which is attached by using manufacturer approved
mechanical fasteners to the substrate.
3. Loose-laid, secured at the perimeter and any penetrations then a ballast of round
river rock is used to hold the material in place.
Modified Bitumen Roofing consists of asphalt with additives that give it plastic or rubber-like properties. The most common types of membrane additives used are APP and SBS. Modified Bitumen roof systems can be two, three or four ply systems and are used on a variety of substrates. Both the APP and SBS membranes can be applied by hot asphalt, or cold process.
Built Up Roofing
Built Up Roofing (BUR) is one of the oldest forms of roofing and has been used in the roofing industry since the 1840's. BUR roofing comes in two basic types - installed with asphalt or installed with coal tar.
There are three basic components of BUR:
1. Waterproofing components - The Base Sheet
2. Reinforcing components - Felts and Fabrics
3. Surfacing component - Gravel, Coatings, Mineral Surfaced Membrane
How many plies and which type and components used depends on the substrate being used and the number of years the roof will be guaranteed.
PVC Roof Systems
PVC roofing has been in the roofing industry in the United States since 1970. PVC is a vinyl single ply roof membrane. The PVC membrane is installed on the roof by heat welding the overlapping edges with an electrically powered heat welder or hand held welder. When the laps are heat welded together, the seam overlay fuses together and as the membrane cools it creates a watertight bond.
PVC membrane has an outstanding weathering characteristics and energy efficiency. PVC roofing systems also reflect nearly 90% of the heat of the sun. The membrane comes in .045 mil and .060 mil thickness.
TPO Roof Systems
TPO (Thermoplastic Polyolefin) roofing is designed to combine the durability of rubber with the proven performance of hot air weldable seams. TPO is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement.
TPO membranes are installed by the following methods:
1. Fully Adhered
2. Mechanically Attached
3. Ballasted
TPO membranes can help reduce a building's cooling requirements. TPO is available in thickness of .045 mil and .060 mil.
Green Roof Systems
Green roofs are on the rise in popularity, as an energy efficient and earth friendly alternative. A Green roof consists of traditional roofing materials covered with vegetation. Most plants for a green roof are between 16 and 24 inches tall. These plants are very low maintenance and tolerant to drought. A membrane protection mat is installed on top of the traditional roof system and then trays of plants are added to the top of the mat. Some green roofs require an irrigation system.
There are several advantages to installing a green roof:
1. A green roof reduces heat from the roof surface.
2. A green roof provides insulation from sound.
3. A green roof shields the roof membrane layer from heat and sun.
4. A green roof will reduce the amount of water pollutants that run off with rain water.
5. A green roof also acts as a natural air filter.
Although green roofs are initially more expensive to install, they can save you time and money in the long run and are good for the environment.