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Glossary of Terms:

Built-up roofing systems (BUR) consist of layers or plies of roofing felts, between which asphalt or bitumen is applied. Built-up roofing is one of the oldest and most durable systems available. Its multiple layers provide extra protection and perform well in extreme weather conditions.  Built-up roofs are especially resistant to damage from wind, hail and snow. They are easy to repair and ideally suited for applications requiring a high level of redundancy.

Modified Bitumen systems consist of asphalt with modifiers added to give it durability.  These are either one- two- (most common), or three ply-systems.   They are factory manufactured and combine the redundancy of built up roofing with the ease of application of a single-ply system. Modified Bitumen Systems are of two kinds: SBS (Styrene Butadiene Styrene) systems are usually installed with hot asphalts or cold adhesives and APP (Atactic Polypropylene) systems in almost every case are installed using the torch method.

Single-Ply roofing systems are composed of insulation, a single ply membrane, flashings, and adhesive.  TPO, EPDM, and PVC the three most common types of single-ply membrane systems.  Since they consist only of a single layer of roofing over insulation, these popular systems are lightweight, making them an ideal choice for retrofits. 

TPO Roofing Systems (ThermoPlastic Olefin) combine the long-term durability rubber provides with the security of hot air welded seams. TPO’s advantages include:

  • TPO roofing systems are the most environmentally friendly of the single-ply systems.
  • They produce no dioxins or chlorine.
  • Membranes come in varying thicknesses to meet your specific requirements and are available in varying roll widths.

EPDM (Ethlyene Propylene Diene Terpolymer) is a stable roofing alternative that withstands extremes of temperature and expands and contracts with the building.

  • EPDM systems require minimal maintenance and are resistant to UV radiation and ozone.
  • EDPM technology has proven effective for more than 30 years.

PVC Roofing Systems are among the easiest single-ply roofing membranes to install and heat-weld together.  Among the advantages PVC systems provide:

  • These systems are able to resist various chemical effluents.
  • They provide superior resistance to punctures and tears.
  • PVC systems are especially suited for roofs that are exposed to concentrations of grease, oils and many kinds of fuels.
  • In areas where acid rain or other forms of acidic outflow is a problem, PVC roofs are the preferred solution.

Metal roof systems fall into three general steep-slope roofing applications:

  • Architectural metal panel roof systems shed water and are intended for use on steep-slope roofs.
  • Structural metal panel roof systems are used on both low- and steep-slope roofs. They are especially appropriate for low-slope roofs because of their hydrostatic, or water barrier, characteristics.
  • Metal shingle panel systems provide the same hydrostatic characteristics, and are often preferred for smaller roof areas.

Roof Repairs Repair is a process where an existing roofing system has additions and adjustments made to it, such as caulking, re-coating and repairing penetration to fix leaks in the roofing system.

Roof Replacement or Re-roofing is the process of installing a new roof when a roofing system fails. Roofing system failures can be caused by a number of factors, including age, severe weather, poor workmanship, defective materials,improper specification of a roofing system, abuse and failure to maintain the roof via inspections.

Restoration involves the major repair of the roof system, including the repair of all penetrations and resurfacing of the roof to restore it to serviceable condition. The opportunity to perform restoration work normally exists two or three years prior to the roofs end of its life cycle and before significant damage occurs. The cost of restoration is typically one half of the cost of re-roofing. We A team is deployed that has specialty training to be able to identify and correct major deficiencies in roof systems prior to replacement. This process can include coatings, re-flashings and modern design modifications.