- Thermally welded multi-chambered 5-5/8″ vinyl frame provides superior strength and thermal insulation. The continuous double weather-stripping dramatically reduces air and water infiltration.
- Interlocking meeting rail system with double weather-stripping for controlling infiltration of air, water, dust, and noise.
- Anodized aluminum screen track, roller track, and threshold for increased strength , durability, and longevity along with an elegant appearance.
- Standard installed handle/lock hardware.
- Operating sash is equipped with adjustable, precision bearing tandem rollers for a smooth and quiet operation.
- 4mm glass unit with our Heatseal Spacer which gives your home excellent thermal efficiency and drastic reduction of condensation.
- Full length heavy gauge reinforcements in meeting rails and pull rail provide great rigidity and strength.
WARRANTY
All OKNA windows and doors are manufactured from high quality materials and are backed by a Transferable Lifetime Limited Warranty.
