Posts Tagged ‘fully adhered’

EPDM Single – Ply Roofing Systems Part 1

July 8, 2010

EPDM Single – Ply Roofing System

EPDM: Ethylene Propylene Diene Monomer (or Terpolymer which is simply a product consisting of three distinct monomers).  EPDM is classified as a Thermoset material which means it is either fully-cured prior to being installed or that it cures during natural weathering after installation.  EPDM roofs are single-ply membranes meaning there is only one ply of roofing material, not multiple plies laminated together.

EPDM has been in use on roofs in the USA since the 1960’s and is one of the most common types of low-slope roofing materials.  This is because it is relatively inexpensive, simple to install, and fairly clean to work with when compared to conventional built-up roofs.  There aren’t the odors and fumes that accompany built-up roofs which appeals to many property owners and managers.

EPDM is a rubber material whose principal components consist of the compounds ethylene and propylene.  A flexible rubber matrix forms when a small amount of diene is added to the mix.  EPDM is available reinforced or unreinforced with both commonly used; it’s also available in either a cured (vulcanized) or uncured (non-vulcanized) state. Vulcanized EPDM is the most common with non-vulcanized often used for flashing purposes.

EPDM membrane thickness ranges from thirty mils (0.030″) to one-hundred mils (0.100″) with the most common thicknesses being forty-five mils (0.045″) and sixty mils (0.060″).  There are three standard application procedures:
(1) fully-adhered
(2) mechanically-fastened
(3) loose-laid

Fully-adhered EPDM uses water or solvent-based adhesives to adhere the rubber to the substrate.  Mechanically-fastened EPDM is attached by manufacturer-approved mechanical means to the substrate, and loose-laid membranes are secured only at the perimeters and any penetrations.  A ballast of round river rock or concrete pavers is used to hold the materials in place.  River rock is usually installed at a rate of 1000 – 1200 pounds per roof square (100 square feet) and the pavers generally weigh approximately 20 pounds per square foot.  Structural integrity is important with loose-laid roof systems.  The seams of all systems are then sealed using either an adhesive or a splice tape.  Splice tapes have tested with a higher tear-strength.

Advertisements

Single-Ply PVC Roofing Membranes

July 6, 2010

GAF EverGuard PVC thermoplastic single-ply membrane systems have been engineered to provide superior long-term performance and enhanced durability.  Strong, flexible, EverGuard PVC membrane is suitable for use in all types of single-ply systems: Mechanically Attached, Ballast Applied, Fully Adhered.

Compared to typical single-ply EPDM, PVC and TPO membranes, GAF EverGuard PVC roofing membrane provides the benefits of all three materials in a single membrane: low installed cost, heat welded seams, white reflective color and tear/puncture resistance.

A custom prefabricated, reinforced, thermoplastic single-ply roofing system that is ideal for any commercial, industrial, or residential (flat or low-sloped) application.  Industry-leading standard commercial warranty has no exclusions for ponding water or consequential damages.  White membrane is highly energy-efficient, reflecting up to 87 percent of the sun’s energy, reducing the energy needed to air-condition a building & saving building owners money.  Extremely durable & easily installed by authorized contractors without disruption to daily operations, the roofing system is also leak-proof, energy-efficient, chemical & fire resistant, resistant to high winds, and virtually maintenance-free.

Because of GAF-Elk’s stringent standards, only the top 3% of all roofing contractors have qualified as Master Elite contractors! Choosing a GAF-Elk Master Elite contractor is your assurance that you’ll be dealing with a quality, reputable, and dependable professional contractor — not some “fly-by-nighter.”

Benefits Of TPO Single – Ply Roof Systems

June 3, 2010

Thermoplastic Polyolefin Roofing Membranes (TPO)

A typical low-slope roofing system consists of three components: a structural deck, a thermal insulation barrier and a waterproofing membrane, which consists of reinforcing fibers or fabric sandwiched between two sheets of flexible matrix.  The matrix material is either asphalt- or polymer-based.  In “single-ply” membranes, the matrix is made of flexible polymer.  The reinforcement provides dimensional stability for the membrane as well as strength to resist stresses in service.  It is generally made of chopped short glass fiber strands packed in a mat, or continuous polyester fiber arranged in a grid or in a non-woven mat.

Benefits of TPOs
The following benefits and characteristics of TPO are:

  • environmentally friendly and recyclable
  • seams can be heat welded
  • available in many colors
  • resistant to heat and UV degradation
  • resistant to may chemicals
  • good cold-temperature flexibility
  • no external plasticizers added

The result is an ideal commercial roofing system that is reliable and cost effective.  The TPO system is one of the latest single-ply, flat roofing technologies on the market today.  The TPO systems can be installed fully adhered or mechanically fastened.