New Roofing

Alliance Roofing provides a wide array of new roofing systems. Learn more about the types of new roofs we can install on your building.

Cool Roofs

A cool roof is a roofing system that can deliver high solar reflectance (the ability to reflect the visible, wavelengths of the sun, reducing heat transfer to the building) and high thermal emittance (the ability to radiate absorbed, or non-reflected solar energy). Most cool roofs are white or other light colors.

Many roofs are dark-colored and, in the heat of the full sun, the surface of a black roof can increase in temperature as much as 50 °C (122 °F). The result is that a buildings will consume more energy for air conditioning than a “cooler” building.

Cool roofs offer both immediate and long-term savings in building energy costs. White reflective membranes, metal roofing with “cool roof” pigments, coated roofs and planted or green roofs can:

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  • Reduce building heat-gain, as a white or reflective roof typically increases only 5–14 °C (10–25 °F) above ambient temperature during the day.
  • Create 15–30% savings on summertime air conditioning expenditures.
  • Enhance the life expectancy of both the roof membrane and the building’s cooling equipment.
  • Improve thermal efficiency of the roof insulation; this is because as temperature increases, the thermal conductivity of the roof’s insulation also increases.
  • Reduce the demand for electric power by as much as 10 percent on hot days.
  • Reduce resulting air pollution and greenhouse gas emissions.
  • Provide energy savings, even in northern climates on sunny days.

image of cool roof shows that suns radiation is reflected

Cool Roof Links:
  1. California Energy Commission www.energy.ca.gov
  2. The Cool Roof Rating Council (CCRC) www.coolroofs.org

Customer Help (Roofing)

LEED, Energy Star, Cool Roof Criteria, Foam Roofing Problems, Newsletter

Green / Garden / Living Roofs

A living roof is a roof system that is partially or completely covered with vegetation, a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage, and irrigation systems.  A living roof is also a cool roof delivering high thermal emittance (the ability to radiate absorbed, or non-reflected solar energy) Also known as “green roofs”, living roofs serve several purposes for a building:

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Aesthetic Improvement

  • Urban greening has long been promoted as an easy and effective strategy for beautifying the built environment and increasing investment opportunity.

Waste Diversion

Green roofs can contribute to landfill diversion by:

  • Prolonging the life of waterproofing membranes, reducing associated waste
  • The use of recycled materials in the growing medium
  • Prolonging the service life of heating, ventilation, and HVAC systems through decreased use

Stormwater Management

  • With green roofs, water is stored by the substrate and then taken up by the plants from where it is returned to the atmosphere through transpiration and evaporation.
  • Green roofs reduce the amount of stormwater runoff and also delay the time at which runoff occurs, resulting in decreased stress on sewer systems at peak flow periods.

Moderation of Urban Heat Island Effect

  • Through the daily dew and evaporation cycle, plants on vertical and horizontal surfaces are able to cool cities during hot summer months and reduce the Urban Heat Island (UHI) effect. The light absorbed by vegetation would otherwise be converted into heat energy.

Improved Air Quality

  • The plants on green roofs can capture airborne pollutants and atmospheric deposition and they can also filter noxious gases.
  • The temperature moderating effects of green roofs can reduce demand on power plants, and potentially decrease the amount of CO2 and other polluting by-products being released into the air.

New Amenity Spaces

  • Green roofs can serve a number of functions and uses, including: Community gardens (e.g. local food production or co-ops), Commercial space (e.g. display areas and restaurant terraces), Recreational space (e.g. lawn bowling and children’s playgrounds)

Energy Efficiency

  • The greater insulation offered by green roofs can reduce the amount of energy needed to moderate the temperature of a building, as roofs are the sight of the greatest heat loss in the winter and the hottest temperatures in the summer.

Increased Roofing Membrane Durability

  • The presence of a green roof decreases the exposure of waterproofing membranes to large temperature fluctuations, that can cause micro-tearing, and ultraviolet radiation.

Fire Retardation

  • Green roofs have a much lower burning heat load (the heat generated when a substance burns) than do conventional roofs

Increased Biodiversity

  • Green roofs can sustain a variety of plants and invertebrates, and provide a habitat for various bird species.

For more information review: http://www.greenroofs.com


Insulation R-Value

An R-value indicates an insulation’s resistance to heat flow. The higher the R-value, the greater the insulating effectiveness.

The R-value depends on the type of insulation and includes its material, thickness, and density. When calculating the R-value of a multilayered installation, add the R-values of the individual layers. Installing more insulation in your building increases the R-value and the resistance to heat flow.

The effectiveness of an insulation’s resistance to heat flow also depends on how and where the insulation is installed. For example, insulation that is compressed will not provide its full rated R-value. The overall R-value of a wall or ceiling will be somewhat different from the R-value of the insulation itself because some heat flows around the insulation through the studs and joists. Therefore, it’s important to properly install your insulation to achieve the maximum R-value.
The amount of insulation or R-value you’ll need depends on your climate, type of heating and cooling system, and the type of building you plan to insulate.

Safety within Roofing

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Solar Roofing

Solar panels are installed on your roof or adjacent structure. These panels are made up of photovoltaic (PV) cells, which convert sunlight into DC power. The DC power from the solar panels is sent to an inverter, where it is converted into AC power, or standard electrical current used to power your facility. AC power travels from the inverter to the electrical cabinet, often called a breaker box. This power is then available to service all of your electrical needs. The utility meter continually measures your electrical supply; when your solar system produces more power than you need, the meter literally spins backwards, accumulating credits with the utility company that will offset your next bill. Your business remains connected to the utility grid to supply you with electricity when you need more power than your system has produced.