The Spotless Window Types Guide

Understanding Your Windows for Better Service

Knowing your window type helps us recommend to you the most effective cleaning approach. Don’t know what type of windows you have? Here’s a simple guide to common window styles we service, but don’t worry…our estimating process involves a site visit or review to ensure we have all the details!

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Window Types Guide

Divided Lite Windows

Windows with multiple small panes separated by mullions (also called muntins or grids). 

Thermal Pane Windows

Also known as double-pane or insulated glass, these windows exist in many different styles and have two or three glass layers to reduce energy transfer and improve efficiency.

Storm Windows

Additional window panels installed inside or outside main windows to enhance insulation, improve energy efficiency, and protect against weather. These are typically found on older homes or as interior mounts in newer builds. Two-sash storm windows slide in tracks or attach with clips or screws, often paired with a sliding screen, so they can be raised without letting insects in.

Double-Hung Windows

Featuring two-sashes (top and bottom) that slide vertically. Many modern versions also tilt in for easy cleaning. Available in thermal pane, single-pane, or divided-light styles.

Casement Windows

Hinged windows that swing open like a door, usually operated by a crank. Can have thermal, single-pane, or divided-light glass. 

Transom Windows

Small decorative windows placed above or beside doors and windows. They can be fixed or operable and come in standard, stained, or leaded glass designs. These are common in older home styles.

Fixed Windows

Non-operable windows designed for natural light and aesthetics. Examples include large picture windows for expansive views and smaller decorative transom windows.

Sliding Windows

Similar to sliding glass doors but smaller, these windows slide horizontally instead of opening vertically like double-hung windows.

Awning Windows

Hinged at the top and opening outward, often using a crank (similar to a casement window). These are popular in modern home designs.

French Doors

Typically seen in pairs, these doors have multiple glass panes and allow for natural light into homes (there are usually at least 8 panes of glass per door). These are commonly used on side or rear entrances.

Sliding Glass Door

Large glass doors that open by sliding along a track. Frequently found in sunrooms or leading to patios.

Palladian Windows

A Venetian-style window with three sections, the central one being arched and wider. Often placed above main entrances or staircases in modern homes.

Bay Windows

A window structure that extends outwards from the home, creating a 180-degree outdoor view and additional interior space. These are common in dining rooms, living rooms, and bedrooms.

Jalousie (Louver) Windows

Made of parallel glass panes in a frame, these windows allow natural ventilation. Often found in older-style homes with sunrooms or enclosed porches.

Dormer Windows

Roof windows that extend vertically from a sloped roof, adding light to upper-story rooms and enhancing architectural design. Their placement can make them tricky to clean.

Lunette Windows

Crescent or semi-circular windows, often placed as decorative arches above doorways.

Glass Block (Glass Brick) Windows

Thick, square glass blocks arranged for privacy while still allowing light. These are common in areas like bathrooms or basements.

Skylight Windows

Glass panels installed in roofs, increasing natural sunlight and improving insulation/ energy efficiency during colder months.

Speciality Windows

Transom Windows

Positioned above doors or other windows, transom windows add architectural character and natural light to your space. These distinctive features come in various styles, from straight to rounded designs, and can feature single or multiple panes to suit your style.

Thermal Pane Windows

Built for energy efficiency, thermal pane windows feature two sheets of glass with an insulating space between them. They usually include internal mullions and provide superior temperature control for your home. Their double-glass construction offers both practicality and clean aesthetics.

Tilt-in Thermal Pane Windows

These innovative windows combine the insulation benefits of thermal panes with convenient tilt-in functionality for cleaning and ventilation. While we typically clean from the exterior, the tilt-in feature provides additional access when needed for a more thorough cleaning.

Fixed Elements

Fixed Windows

Designed without operating parts, fixed windows provide uninterrupted views and maximum light transmission. They’re often smaller in size and can feature either single or multiple panes, making them great for highlighting architectural features or brightening specific areas.

Storm Windows

Storm windows provide an additional layer of protection and insulation to your existing windows.

*Note: During exterior-only cleaning, we focus on the outer surface of storm windows, not the space between the layers. These protective frames enhance your home’s weather resistance while keeping curb appeal.

Need Help Identifying Your Windows?

Understanding your window type shouldn’t be complicated. Our experienced team can help you identify your specific window styles and recommend the most effective cleaning solutions. We’re happy to discuss your windows over the phone or provide an in-person assessment for the best service possible.

Contact us for expert guidance:

Phone: 804-231-0749
Email: [email protected]

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