Residential/Commercial
Roof Savings Calculator (RSC)
Beta
The Roof Savings Calculator (RSC) is undergoing revision and validation. Results from the current version of RSC (beta release 0.92) may be inaccurate and should not be cited.
Go to:
Simple Mode
Go to:
Advanced Mode
Java-less version
Building
Closest location (similar weather):
Building Type:
Residential
Office
Warehouse
Box Store
Conditioned floor area (ft
2
):
Number of floors:
Window-to-wall ratio:
Year of construction:
post-1990
1980-1990
pre-1980
Heating/Cooling
HVAC equipment:
Electric heat pump
Natural gas furnace
Electricity price (cents per kWh):
Natural gas price (dollars per 1000 ft
3
):
Heating system efficiency (AFUE):
High-efficiency (90%)
Mid-efficiency (83%)
Low-efficiency (70%)
None
Custom
Heating system efficiency (HSPF):
High-efficiency (10)
Mid-efficiency (7)
Low-efficiency (5)
None
Custom
Cooling system efficiency (SEER):
High-efficiency (15)
Mid-efficiency (13)
Low-efficiency (10)
None
Custom
Roof 1 - Existing Roof
Roof type:
Tile
Metal
Asphalt shingle
Roof type:
Single-ply membranes
Concrete pavers
Modified bitumen
Metal
Built up
Solar reflectance (aged 3 yrs):
60%
50%
40%
30%
20%
10%
Custom
Thermal emittance (aged 3 yrs):
Acrylic Al-Zn coated steel (15%)
Bare Al-Zn coated steel (20%)
Metallic field-applied coating (50%)
Painted steel (85%)
Other materials (90%)
Custom
Above-sheathing ventilation:
Yes
No
Pitch (rise:run):
High (slope ≥ 8:12)
Medium (2:12 < slope < 8:12)
Low (slope ≤ 2:12)
Radiant barrier present:
Yes
No
Attic insulation (hr ft
2 o
F per Btu):
R-50
R-38
R-19
R-11
R-7
R-5
R-3
None
Custom
Duct location:
Conditioned space
Attic
Duct leakage:
Inspected (4%)
Uninspected (14%)
Roof 2 - Cool Roof Comparison
Roof type:
Tile
Metal
Asphalt shingle
Roof type:
Single-ply membranes
Concrete pavers
Modified bitumen
Metal
Built up
Solar reflectance (aged 3 yrs):
60%
50%
40%
30%
20%
10%
Custom
Thermal emittance (aged 3 yrs):
Acrylic Al-Zn coated steel (15%)
Bare Al-Zn coated steel (20%)
Metallic field-applied coating (50%)
Painted steel (85%)
Other materials (90%)
Custom
Above-sheathing ventilation:
Yes
No
Pitch (rise:run):
High (slope ≥ 8:12)
Medium (2:12 < slope < 8:12)
Low (slope ≤ 2:12)
Radiant barrier present:
Yes
No
Attic insulation (hr ft
2 o
F per Btu):
R-50
R-38
R-19
R-11
R-7
R-5
R-3
None
Custom
Duct location:
Conditioned space
Attic
Duct leakage:
Inspected (4%)
Uninspected (14%)
Calculate
Running Simulations
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