One of the most interesting roof types being proposed and installed as a solution to mitigating the Urban Heat Island phenomenon is the Garden Roof - a better descriptor than the broader term Green Roof that can refer to reflective cool roofs as well garden roofs.
Types of Garden Roofs:
Intensive - planned and designed roofs incorporating planting medium up to several feet in depth requiring extensive maintenance. These roofs are intended for public access and use and are usually built-in-place.
Extensive - planting media is eight inches or less in depth with few maintenance requirements and not intended for public access; usually composed of recycled plastic modular planting units.
Benefits of Garden Roofs:
- Mitigate Urban Heat Island effect - saves energy and reduces rooftop temperatures
- Manage storm water runoff
- Aesthetic improvement - adds value
- Reduces glare to surrounding buildings
- Increases oxygen production
- Plants absorb CO2
- Absorbs sound - due to increased mass
- Reduced HVAC requirements
Composed of asphalt and reinforced with either polyester or fiberglass, modified bitumen roofs are a blend of traditional and modern roofing technologies. Two different polymers, Styrene Butadiene Styrene (SBS) or Atactic Polypropylene (APP), are used to modify the membrane and impart greater elasticity and temperature flexibility. Since polyester fiberglass fortifies the roof system, it exhibits more strength and resistance to punctures and is typically installed in various layers to provide a multi-tier protection system from water, extreme temperatures, and wind uplift.
Modified Bitumen Roof Systems do differ in how they are installed on the roof based on the polymer sheet chosen. SBS, a polymer that gives bitumen characteristics similar to rubber, is typically installed with hot asphalt or cold adhesives. APP, a thermoplastic polymer, is almost always installed utilizing the torch method.
Ethylene Propylene Diene Terpolymer (EPDM) is a stable membrane that can withstand and resist almost any type of nature-born tension. This single-ply roof membrane, also commonly referred to as a rubber roof system, utilizes carbon black as it's the molecular "backbone" which enables it to take on characteristics such as the ability to expand up to 300% yet retain 100% structural memory. EPDM also has excellent weathering resistance and serves as a superb second generation (roof-over) application.
Thermoplastic Polyolefin (TPO) and Poly Vinyl Chloride (PVC) are thermoplastic roof systems that are both white and highly reflective roof membranes. These roofs provide excellent weathering characteristics and are highly resistant to ultraviolet light and most chemicals. The membranes have a reinforced scrim and are puncture and tear resistant. Thermoplastic roofs have outstanding seam strength due to the fact the sheets are welded using hot air. These types of roof systems are lightweight and well suited for second generation (roof-over) applications.
When your organization has a roof leak, it's essential to have a commercial roofing repair company who can locate the source quickly and make repairs in an efficient and timely manner so that your operations and personnel are not interrupted. Each roof leak is unique. Certain damage may be visible at the roof surface level while some water damage will go undetected by an untrained eye, particularly on a leaking flat roof. A thorough assessment requires an experienced roof repair contractor with highly trained roofing inspectors to investigate and identify the extent and severity of damage to your roof system. Starmark is a roofing repair company with roof inspectors who know how to examine the critical areas so proper roof repair or replacement can be performed. Our professional inspectors provide a comprehensive evaluation of your roof at critical checkpoints on the roof system.
Roof Coating is a liquified polymer thats applied to the top-layer of an existing roofing to protect and extend the life of your roof. When deciding on the probability of using roof coating there are some factors that need to be taken in consideration these include, chemical exposure, high heat, UV radiation, and ponding water. There are also different roof coatings, Acrylic coating which is used over metal roofing to provide seamless, watertight seal over the entire roof, Aluminum coating which is applied to bitumen based roofs, and finally Copolymer coating which can be applied to single-ply and metal roofs.