Patented R-Core®
Insulation in the frame
increases both thermal
performance and sound
deadening properties

Standing Up to the Pressure

Where most windows have a DP30 rating, our Great Lakes Windows have a design pressure rating of 50. This is a measure of the amount of pressure a window or door is designed to withstand when closed and locked. This means Seabrooke® windows remain strong, standing up to 50 pounds of pressure per square foot, which is equivalent to the pressure created by 150 mph winds. They can also withstand water penetration when exposed to the equivalent of 8" of rain per hour driven by 55 mph winds.

NFRC Terms

• U-FACTOR: U-factor measures how well a product prevents heat from escaping. The rate of heat loss is indicated in terms of the U-factor (or U-value) of a window assembly. U-factor ratings generally fall between 0.20 and 1.20. The insulating value is indicated by the R-value, which is the inverse of the U-value; the greater a window's resistance to heat flow, the better its insulating value.
• Solar Heat Gain – Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat caused by sunlight. The SHGC is the fraction of incident solar radiation admitted through a window, both directly through the glass and absorbed and subsequently released inward. SHGC is expressed as a number between 0 and 1. The lower a window's solar heat gain coefficiant, the less solar heat it transmits.
• Visible Transmittance – Visible Transmittance (VT) measures how much light comes through a product. The visible transmittance is an optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted.
• Air Leakage – Air Leakage (AL) is indicated by an air leakage rating expressed as the equivalent cubic feet of air passing through a square foot of window area (cfm/sq ft). Heat loss and gain occur by infiltration through cracks in the window assembly. The lower the AL, the less air will pass through cracks in the window assembly. Note this rating is optional and manufacturers can choose not to include it.
• Condensation Resistance – Condensation Resistance (CR) measures the ability of a product to resist the formation of condensation on the interior surface of that product. The higher the CR rating, the better that product is at resisting condensation formation. While this rating cannot predict condensation, it can provide a credible method of comparing the potential of various products for condensation formation. CR is expressed as a number between 0 and 100.00. Note this rating is optional and manufacturers can choose not to include it.

Bay Windows

Not only do Bay Windows add a distinctive touch to your home's exterior, but the inside seat is ideal for displaying family photographs and precious objects. Like Bow Windows, Bay Windows provide the perfect intimate setting to complement your interior space. Combine a Picture Window with either Casements or Double-hungs to create your own unique Bay Window style.

Bow Windows

Add a Bow Window and instantly transform a room from basic to beautiful. The delicate curved design makes an elegant statement and become the focal point of your living room or family room. Carve out a cozy place to curl up with a good book. Choose birk or oak framing and custom strain or paint to match your decor. Combine optional enhancements such as V-Groove glass, light or dark oak woodgrain finishes, or internal grids to take your Bow Window to new artistic heights.

Casement Windows

Replace old Double-hung or Slider Windows with Casements to create a fresh look, right out of the latest architectural magazines. Casement Windows can dramatically enhance and modernize your home's exterior. Besides adding elegance, this high-end window has a smooth operating hardware that opens and closes with ease. Windows pivot out 90 degrees for easy cleaning from inside your home and provide increased ventilation.

Double-Hung Windows

From country cottages to colonials, Double-hungs are a classic style in American architecture. Selected by generations for its charming appeal and traditional lines, the Double-hung Window can be customized to your liking.