While vinyl is the most prevalent residential window framing material, many believe it lacks the durability required for commercial construction. Innovations that have enhanced the structural performance of vinyl frames are challenging this perception.

Structural Integrity

The mechanically fastened joints of aluminum frames may admit air and water. Fusion-welded uPVC joints create an impervious seal.


Unlike aluminum and wood, uPVC is virtually maintenance free. It never needs paint, and requires only an occasional wash and wipe to clean.


Aluminum can corrode from exposure to weather and pollution. uPVC is naturally resistant to moisture and atmospheric pollutions such as acids, alkalis and salt air.

Energy Efficiency

Aluminum is a natural conductor of cold or hot temperatures, while uPVC is a natural insulator, resisting heat loss in winter and heat gain in summer. Typical uPVC frames have U-factors that are at least 20 percent better than aluminum and are also superior to thermally broken aluminum.

Condensation Resistance

The risk of mold increases as building envelopes get tighter. uPVC frames resist condensation much better than aluminum frames.

Sound Transmission

Aluminum’s mass gives it good sound insulation potential, but sound can enter a building through mechanical joints in aluminum frames. Multiple chambers within uPVC frames, coupled with proper glazing, can achieve strong acoustic performance.