The Terms Low-slope and Steep-slope Describe Roof Slope.
Slope is how much a roof slants. A low-sloped roof is one that has a slope of less than 3 inches per foot. This means that for every horizontal foot, the roof level goes up less than 3 inches vertically. Steep slope means that the slope is 3 inches per foot or more.
It is not hard to remember the difference between horizontal and vertical. Think about the fact that the sun sets “over the horizon.” This will remind you that the horizon is flat. Horizontal means across or flat. Vertical means up and down.
To figure out roof slope, you need to know two measurements. These measurements are called the rise and the run.
The rise is the vertical distance. You can remember this is the vertical measurement because rise means to go up. It goes from the lowest point of the roof to the highest point. The run is the horizontal distance. It goes from the vertical line of the rise to the outer edge of the roof.
0.55 and a Minimum Thermal Emittance of 0.75 for Low-sloped Nonresidential Buildings.
White and Tan TPO membranes are listed with the Cool Roof Rating Council (CRRC), and meet or exceed the new Title 24 requirements for low-slope roofing membranes. The listing for White and Tan TPO membranes can be found on the Cool Roof Rating Council (CRRC) web site. The flexible, hot-air welded membrane is available in 5’, 6′, 10′ and 12′ widths and thicknesses of .045″, .060″ and .080″.
Why Choose TPO?
TPO, or Thermoplastic Poly Olefin, roofing systems are rapidly becoming the top choice among clients from every genre of industry – and with good reason. TPO offers superior protection against virtually anything Mother Nature can throw at your building; from excessive heat and cold to high wind and the most torrential downpours. It is strong, highly-reflective qualities make it an ideal choice for enduring the long Chicago summers, while the use of welded seams helps safeguard your investment against leaks and other potential problems.
TPO formulation is designed to provide excellent ozone and chemical resistance, ensuring long-term roof performance. Plus, TPO is environmentally friendly, offers superior puncture resistance (especially against hail) and costs less than competitive roofing materials. When properly installed, this innovative roofing system can help reduce both heating and air conditioning bills. TPO is available in several neutral color shades, including white, cream, tan and gray. Maintaining a TPO roof is minimal, though regular seasonal cleaning is strongly advised and a service we offer. A-1 All American Roofing has extensive experience in this popular application and stands behind each and every installation we design. Here are some of the main benefits:
Enhanced Energy Efficiency
- White reflective surface exceeds the EPA’s ENERGY STAR® requirements
- White, tan and gray are listed with the Cool Roof Rating Council (CRRC)
- White and tan are compliant with California’s Title 24 Energy Efficiency Building Standards and can be used to gain credits with Leadership in Energy and Environmental Design (LEED®) certification
Long-Lasting Performance
- Resists degradation from ultraviolet (UV) radiation and ozone
- Guards against erosion from harmful chemicals and microbial growth
- Performs at more than three times the ASTM International standard for weathering resistance
Superior Durability and Strength
- Average thickness over scrim exceeds ASTM D6878 standard on 45-mil, 60-mil. and 80-mil
- Provides enhanced puncture, tear and abrasion resistance
Less Environmental Impact
- Can add LEED® points to the design, construction, operation and maintenance of a commercial building
- Proximity of product availability reduces greenhouse gas emission and contributes to energy conservation
- Does not contain chlorinated or halogenated components
Excellent Wind Uplift Resistance
- TPO seaming technology creates a full-width seam extending on both sides of the seam attachment
- Process allows uplift forces to be distributed uniformly along all edges of the fastening system for improved wind
