Single Hung Windows

A single hung windows delivers clean style, smooth operation, and solid value. A single-hung window has a fixed upper sash and a lower sash that lifts to open, so you get everyday ventilation with fewer moving parts. The compression seal pulls the sash tight when closed to help limit air leakage and reduce outside noise. Slim profiles keep more glass in view for natural light. Durable vinyl frames resist warping, fading, and corrosion in varied climates. Pair the unit with Low-E glass and argon for stronger thermal performance and better UV control. Hardware is simple and reliable, and the lift action feels light even on larger sizes. This design fits bedrooms, living rooms, and hallways where you want airflow without a wide swing path, and it suits both classic and modern homes.

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Rated to 200 °F

The Onyx Collection vinyl single hung windows perform at temperatures up to 200°F. This exceeds standard vinyl, typically rated around 162°F. The bottom sash lifts and locks smoothly in hot climates, helping vinyl windows, including black vinyl windows, keep their shape while supporting energy-efficient windows performance.

Engineered for Stability

The Onyx Collection is engineered to resist window warping. Intense heat, direct sun, and moisture can cause frames to expand or shrink, but this onyx profile maintains dimensional stability so sashes track true and seals stay tight. An interlocking meeting rail and constant-force balances support smooth vertical travel and reliable energy performance, making it a strong choice for window replacement in high-sun environments.

Long-Lasting Deep Color

The Onyx Collection preserves its deep onyx color under UV exposure, temperature shifts, and changing conditions. Its distinct onyx shade pairs well with many aluminum windows and doors, giving a modern, upscale look beyond traditional white vinyl. The Onyx Collection profile meets ASTM International and AAMA standards. The series also meets the latest NFRC Energy Star 7.0 requirements when configured with qualifying glass, recognized as the most rigorous energy efficiency standard in the U.S., supporting strong thermal performance and long-term comfort.

Frequently Asked Questions

What are single-hung windows?

A single-hung window has two sashes stacked vertically. The bottom sash slides up to open; the top sash is fixed. This simple design is popular for its classic look and dependable performance in replacement projects.

Which is better, single or double-hung windows?

Single-hung windows are typically more affordable and can be a bit more efficient because the upper sash does not move. Double hung windows open from both the top and bottom, which adds ventilation options and can make cleaning easier on upper floors.

Where are single-hung windows used?

They work well on main-level rooms where outside access makes cleaning the fixed upper sash manageable. The fixed top keeps the sightline clean, while the operable lower sash provides everyday airflow, good fits include living rooms, bedrooms, and hallways.

Are single-hung windows energy efficient?

They can be. With fewer moving parts, there are fewer paths for air to sneak through when closed. For the best results, look for Low-E coated glass, argon gas fill, and NFRC-rated packages that match your climate; lower U-factor values indicate better insulating performance.

GLASS

Creating your own insulating glass unit (IGU) by following three simple steps

Step 1: Type of Glass

Annealed |Tempered | Laminated

Annealed Glass

Clear, standard glass with excellent clarity and value for everyday applications.

Tempered Glass

Heat-treated for additional strength and safety. If broken, it crumbles into small pieces to help reduce injury risk.

Laminated Glass

Two sheets bonded with a safety interlayer. Enhances security, improves sound control, helps block UV, and holds together on impact.

Step 2: Dual-pane / Triple-Pane

Dual-Pane IGU

Two panes separated by a warm-edge spacer with argon gas between the panes. A balanced choice for clear views, insulation, and cost.

Dual-Pane Glass Diagram with LoE 366 and Lami. Glass

Triplepane Glass Diagram with Two LoE 366 Glass

Triple-Pane IGU

Three panes with two spacers and argon gas in both chambers. Higher insulation and better sound control. Available on select sizes.

Step 3: Energy-Efficient Coated Glass

LoE 366

Triple layer coating glass for outside solar control. Helps manage heat gain while keeping interiors bright.

LoE i89

Four layer coating clear glass for room-side efficiency. Enhances insulation and supports maximum energy savings.

Step 4: Color & Pattern Options

Choose from a range of pattern glass designs to add privacy and character to bathrooms, entry areas, and other spaces. These options bring dimension to windows or doors while maintaining natural light.

Matte

Bamboo Glass

Glue Chip

Obscure

Grey

Bronze

Reeded

Rain

Delta Frost

GRID

Grid Between the Glasses

The grille sits between the panes, so you get the look you want and an easy-to-clean glass surface with no exterior bars to wipe around. *We also offer Simulated Divided Lite (SDL) grids for specific window and door styles. SDL options require additional lead time and cost. Please contact our sales team for details.

Flat Grids Size: 5/8, ¾

Sculptured Grid Size: 5/8, 1

Grid Patterns

Available patterns include Marginal, Double Prairie, Colonial, and Marginal MG18.

*Grid patterns allow wide customization but are limited to vertical and horizontal orientations. *Geometric picture windows have specific grid pattern options. Please contact our sales team for more information.