We provide high quality roofing solutions with the utmost service. We will partner with you through the entire process – design and budgeting to installation and follow-up – providing service long after the roof is installed. We understand the complexities and concerns that come with minimizing fumes, dust/debris, noise, and staging etc. We will help you make an educated decision to suit your needs.
There are an array of roofing systems and membranes to consider:
Single ply roofing systems are, as the name suggests, roofing systems consisting of one “ply” or “layer” or roof membrane. TPO and PVC are single-ply membranes designed to be used on low slope and flat roofs. TPO stands for Thermoplastic Polyolefin and PVC stands for Polyvinyl Chloride. They are a part of a broad family of roofing membranes that are more commonly used on commercial roofs. There are specific differences between TPO and PVC worth knowing when deciding which one to choose for your commercial roof.
PVC has been commonly used since the 1960’s on commercial roofs. TPO was originally designed to be an improved version of both PVC and another rubber membrane called EPDM or Ethylene Propylene Diene Monomer. TPO combines the benefits of PVC and EPDM, making it more flexible and reflective, as well as environmentally friendly and more weather resistant.
TPO and PVC are both white in color, providing a reflective surface on the roof and making them resistant to heat and the sun’s ultraviolet rays. Having a reflective, cool surface helps to reduce AC usage during the hot summer months. Both materials are resistant to chemicals, grease and oil, but PVC holds up better under the exposure. This is something to keep in mind if you have a roof where a lot of chemicals, oil and grease may be exposed to the roof. TPO and PVC are both designed to be flexible, conforming to the shape and movement of your commercial roof.
The Installation of TPO and PVC Roofing Materials
The installation of both roofing products are very similar. Here are the four ways they are installed:
Mechanically Fastened, Fully Adhered, Self-Adhered, Induction Heating/Metal Plate Attachment.
Benefits: Lightweight, odorless, positively watertight seams (thermoplastic), generally white in color compliant with California title 24.
Limitations: Initial cost can be higher than BUR systems.
BUR is the acronym for Built-Up Roofing, so called because it is field assembled using alternate layers of roofing “felt” and asphalt. It is one of the oldest systems in the modern roofing industry and provides a certain level of insurance against mechanical damage by virtue of the multiple layers. The felts themselves are not watertight and the resistance to water entry is provided by the layers of asphalt.
Previously considered the least expensive roofing system, the current rapid increase in the price of asphalt is diminishing the differential in cost between BUR and some of the Single Ply Systems. Also, the requirement in California that some roofs have a reflective and heat emissive membrane has resulted in the BUR manufacturers’ producing white surfaced materials to meet this requirement. These white BUR’s are more expensive than some of the single ply membranes which have always been inherently reflective.
Benefits: Multiple layer redundancy favored by some.
Disadvantages: Typically a higher maintenance requirement than competing systems. With high asphalt costs the perceived price advantage has severely eroded.
The words “asphalt and “bitumen” are virtually interchangeable. A modified bitumen system is very similar to a Built-Up system EXCEPT the asphalt used in these systems has been modified by the addition of synthetic rubberized polymers.
The polymers provide increased resistance to brittleness in cold temperatures and increased elasticity of the sheet. Together, these properties offer a greater expected service life over their BUR “cousins”. There are two types of systems SBS (styrene-butadiene-styrene) and APP (attactic polypropylene). Each imparts a flexibility prolonging the system life. In some systems the back of the sheets are coated with the modified asphalt which when heated with propane torch melts and forms the adhesive which holds the system together. These systems are commonly referred to as “torched” systems.
TILE AND SHAKE
Although considered residential roofing systems, many non-residential buildings employ these roofing systems, more especially tile, either completely covering the entire roof, or as an accent finishes on areas such as towers. These are often specified for “steep slope” areas of the roof such as mansards. Examples of non-residential roofs utilizing tile or shingle include buildings such as wineries and student housing.
Metal roofing systems are possibly the fastest growing segment of the non-residential roofing market. This is because metal offers a large selection of styles and colors and has a reputation for longevity. Most of the attractive metal systems seen in areas such as shopping centers are called “architectural metal systems” and require a structural supporting deck underneath the metal with a watertight underlayment.
There are also a “structural metal systems” which are attached to a metal framework and are strong enough not to require any supporting deck. The modern versions of these systems utilize hidden fasteners obviating the need to screw through the metal panels to the structure. This avoids the previous problems of rust at the screw holes which led to leaks.
AAA Roofing installs metal roof systems by many manufacturers ranging from almost flat to steep Slope. These roofs come in diverse styles such as flat and derivatives of standing seam configurations and finishes including aluminum, zinc, copper, galvalume and various Kynar type color finishes.
Coating an existing roof can extend its service life, provided that the existing roof is in a salvageable condition. It can also bring a roof into compliance with Title 24 Part 6 as it applies to reflectivity and heat emissivity. Coatings can be applied to any roof surface; metal, built-up roofing, single ply, etc. Coating systems on metal roofs usually include treating the seams, and on older systems, treating the exposed fasteners prior to the application of the coating. Metal roofs especially benefit from coatings as it keeps the metal cooler and reduces expansion and contraction.
Coating a roof membrane prevents the degradation caused by UV light and keeps the roof cooler so that any membrane under the coating is fully protected which extends the service life.