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Home>flat roofing>Flat Roofing Solutions
Flat Roofing
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Best crew and standard products for your service.
The single-ply roofing system in Flat roofing is ideal for virtually any commercial or industrial, flat or low-sloped application.
The highly-reflective white mebrane delivers real energy cost saviings for building owners and managers.
PVC(Polyvinyl Chloride) Roofing:
PVC roofing is a type of Thermoplastic roof membrane.PVC roof is a single-ply membrane that consist of two plies or layers of PVC material with a polyester reinforcement scrim between the layers. Top ply has special additives to make the membrane UV stable, prevent curing, plasticizers to make it flexible and pigments for color. IB also uses a layer of acrylic coating to make their roof more reflective and to repel dust and dirt. Bottom ply is a black PVC with plasticizers for flexibility and usually no other additives or fillers.
PVC roofs are put together by using hot-air welding (fusion welding) of seams, which creates a permanent physical bond between two separate sheets of roofing membrane. This hot-air welding is what makes PVC roofing such a great roofing product – it can remain water-tight and pliable for decades after it was originally installed.
PVC roofing are versatile and the materials produced with these polymers have wide ranges of use in residential, industrial and commercial applications.
PVC roofing sheets are resistant to bacterial growth, many industrial chemical atmospheres and plant-root penetration. Properly formulated PVC roof materials are fire-resistant and have god seaming characteristics.
TPO(Thermoplastic Olefin or Polyolefin) roofing:
TPO membranes are single-ply roof membranes constructed from ethylene propylene rubber.
TPO roofs are designed to combine the durability of rubber with the proven performance of hot-air weldable seams.
TPO roof membranes are formulated from flame retardants, pigments, UV absorbers and other proprietary ingredients.
The TPO membranes usually are produced as white or black sheets but other colors may be obtained. TPO roof membbranes vary in look
feel and physical properties. Some are soft and flexible, and others are boardy or rigid.
TPO membranes exhibit posiitive physical properties, such as heat agingg,
cold-temperature felxibility, puncture resistance and tear strength. They are
also resistant to degradation from exposure to animal fats, some hydro carbon
oils and vegetable oil. They also are resistant to microbial attack and will not
supportt growth of micro organisms.
TPO roofs have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install. The material's manufacturers are so confident in properly welded seams that the material is sometimes advertised as a monolithic (seamless) roof. Seam strengths are reportedly 3 to 4 times those of EPDM's adhesive and tape seams.
TPO is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement. TPO's are available in white, light gray, and black with thicknesses of either 45 mils (.045") or 60 mils (.060"). The width of the membrane depends on the manufacturer but they usually come in widths of six to six-and-a-half feet and are one-hundred feet in length.
TPO membranes are installed fully-adhered, mechanically-attached or ballasted. Fully-adhered means that the roof is "glued" to the substrate using a special adhesive. What actually happens is the glue creates a chemical bond with the membrane. Ballasted simply means the membrane is loose laid over the top of the roof, sealed at all penetrations and around the perimeter, and then a ballast is put on it to hold it in place. Ballast usually consists of smooth, round, river rock 2" - 3" in diameter and is applied at a rate of 1,000 to 1,200 pounds per roof square (100 sq. ft.). Mechanically-attached membranes are those that use some type of special screw-type fastener to secure it. The type of fastener will depend on the type of substrate but all fasteners are generally screw-type fasteners.
EPDM rubber roofing:
EPDM formulations are versatile, and many EPDM materials produced have a wide range of use in automotive, industrial, and commercial applications. EPDM roofing has been used as a roofing material in North America since the early 1960s.
EPDM is a synthetic rubber material that can be formulated with extensive flexibility for use as membrane sheet roofing. EPDM membranes exhibit good resistance to ozone, UV rays, weathering, and abrasion. EPDM also has good low temperature
felixibility. EPDM is resistant to some acids; alkalis; and oxygenated solvents, such as ketones, esters and alcohols. On the other hand, exposure to aromatic, halogenated and aliphatic solvents, as well as animal and vegetable oils and petroleum based products, should be avoided to prevent memebrane swelling and distortion.
Modified Bitumen roofing:
Modified Bitumen (MB) roofing is an asphalt-based, close cousin of the Built-up-Roof (BUR) designed for buildings with low-slope or “flat” roof structures. Engineered modified bitumen roofing membranes originated in Europe in the mid 1960's and have been used successfully in the United States and Canada since approximately 1975.
Increased resistance to brittleness at cold temperatures, greater flow resistance at high temperatures, and increased elasticity can be achieved by blending synthetic rubberized polymers with asphalt in lieu of modification by the blowing process used for BUR asphalt. There are numerous surfacing options for this system which include a factory applied mineral surface, gravel surface, including “cool roof” coatings which are highly-reflective to save on building cooling costs. Mineral-surfaced MB products are typically furnished with white granules, but are also available in designer colors to match asphalt shingles or to otherwise compliment the building design.
MB gives designers and installers an even broader array of options than BUR. MB may be installed by the torch-application method, or “hot-mopped” like BUR, or applied with “cold-process” adhesives. The latest innovation with MB is the self-adhering sheet. Using special combinations of polymers to modify the underside of the MB sheet, the rolls are manufactured with a release paper. The installer removes the release paper and as the sheet is rolled out, it adheres itself to the substrate. This method eliminates the risks associated with the use of torches, hot asphalt, and is completely free of VOC (volatile organic chemicals) fumes during and after application.
Benefits of Modified Bitumen Roofing are proven track record of performance, superior waterproofing characteristics,
broad range of application methods, wide choice of top-surfacing, including “Cool Roofing” options
with insulation, provides an even better-performing building component, high tensile-strength,
long-term warranties are available with many MB systems.
Built Up Roofing:
Built up roof consists of multiple plies of roof felts laminated together with bitumen.
Built-up roof material can consist of bitumen-saturated felt, coated felt, polyester felt or
other fabrics. A surfacing is generally applied and can be asphalt, aggregate (gravel or slag),
emulsion or a granule-surfaced cap sheet.
Built-Up Roofing is one of the oldest and most reliable ways of installing a new roof.
It was first known as composition roofing and started in the 1840's.
B.U.R.?s come in two basic types, asphalt and coal tar, and three basic components ?
(1) the waterproofing component, (2) the reinforcing component, and (3) the surfacing
component which is used to protect the other components from the elements.
There are many different types of materials used in Built-Up Roofing.The difference in the base
sheets is simple.The service life of a roof is dependent on many factors:
geographical location & weather conditions, foot traffic, materials used,
conditions under which the roof was installed, slope of roof, type of surfacing material, etc.
Under ideal conditions, a 3-ply built-up roof should last at least fifteen years, a 4-ply should last at least 20 years, and a 5-ply should last at least 25 years.
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Rocket Roofing Corp
