Pittsburgh Replacement Windows: Lower Energy Costs,
Low Maintenance, & Increased Property Values

Thermal Performance

U Factor - Thermal Insulation

The U Factor indicates how easily heat will flow through the window, whereas R Factor indicates the opposite: how well the window will resist heat flow. The lower the U Factor, the better a window insulates.

Solar Heat Gain Coefficient

A window's Solar Heat Gain Coefficient (SGHC) is the amount of solar radiation admitted through it. The lower a window's SHGC, the less solar heat is transmitted into the house and the easier it is to keep your house cool in the summer. On the other hand, in northern climates a higher SHGC can provide beneficial passive solar heating in the winter. Signature offers a variety of high performance Low E glass packages with varying SHGC ratings to suit your needs, based on your climate.

Visible Transmittance (VT)

VT measures the percentage of visible light that is admitted through the window. Signature's spectrally selective glass coating packages have been designed to enhance a window's thermal performance by blocking a large percentage of ultraviolet and infrared light, while maximizing visible light transmission. Clear glass itself blocks about 20% of visible light.

---

Signature's High Performance Glass Packages

Start Saving on Your Energy Bills Now, While Increasing Your Home's Value.

---

Structural Integrity and Performance

Signature windows are tested to standards set forth by the American Architectural Manufacturer's Association (AAMA) for structural performance. Air infiltration, water penetration, and structural window loads are three commonly referenced tests.