NYC Window Replacement Guide

Windows play a crucial role in both aesthetics and energy efficiency. Here’s what you need to know when selecting windows for your project.

Step 1: Plan Ahead for Lead Times

• Windows are not typically off-the-shelf items, especially for custom residential projects.

• Even if manufacturers offer standard sizes, most windows are made to order.

• Lead times range from 6-10 weeks, so orders should be placed by mid-June to stay on schedule.

Step 2: Energy Efficiency & Performance

• U-Factor measures insulation—look for a U-Factor of 0.27 or lower.

• Ideally, choose windows with an even lower U-Factor for maximum energy efficiency.

• Triple-glazed windows are highly recommended for soundproofing and energy efficiency, especially in NYC where street noise can be an issue.

Step 3: Explore Window Brands & Showrooms

European Windows (High-Performance Options)

These brands offer superior insulation and energy efficiency, especially for passive house designs:

• Klearwall (Ireland) – Cost-competitive with domestic brands but higher performance.

  • Showroom available in Brooklyn. Let us know if you’d like to visit.

  • Klearwall

• Bieber & Zola – High-quality European brands with longer lead times.

  • Zola is currently used in a project in Williamsburg.

  • Bieber | Zola

• Rehau & Intus – Efficient and well-made vinyl/polymer windows.

  • Samples available in the office.

  • Intus | Rehau

• Le Page & NanaWall – High-quality customizable windows and doors, great for expansive openings.

  • Le Page | NanaWall

Domestic Windows (More Readily Available Options)

These brands meet building code requirements but generally don’t match European performance:

• Andersen Windows – Available at many locations, including Home Depot.

  • Visit Herzog’s in Kingston for a good selection.

  • Focus on the A-Series, E-Series, or 400-Series.

  • Andersen A-Series | Andersen E-Series | Andersen 400-Series

• Marvin Windows – Mid-to-high price range, with a well-performing Integrity (fiberglass) line.

  • Showrooms in Westchester & Freeport.

  • Marvin

• Weather Shield – Start with the Premium Series.

  • Weather Shield

• Kolbe & Kolbe – Check out the Ultra Line.

  • Kolbe Ultra Line

• Jeld-Wen – Consider the Custom Wood/Clad Line.

  • Jeld-Wen

• Showroom Recommendation – You can see Weather Shield, Kolbe, and Jeld-Wen near Saugerties.

  • Plan a visit around May 30 or June 5.

  • The Professional’s Connection

Avoid Pella Windows.

Step 4: Important Considerations

LPC Requirements for Window Replacement

• If your building is in a historic district or a landmark property, Landmarks Preservation Commission (LPC) approval is required for window replacements.

• LPC often requires windows to match the original design in material, style, and grid pattern.

• For approvals, work with a vendor familiar with LPC regulations and a qualified architect.

Hardware & Screens

• High-quality window hardware ensures smooth operation and durability. Avoid brands with track or hinge issues.

• Consider invisible or retractable screens for a cleaner look and improved functionality.

Townhouse Lower Floors & Large Openings

• In townhouses, full-size window openings on lower floors can enhance indoor-outdoor connectivity when the weather is nice.

• Options like NanaWall systems allow for seamless transitions between interiors and gardens or terraces.

Step 5: Next Steps

Review your project needs and preferences.
Decide on European vs. Domestic options.
Plan showroom visits if necessary.
Place your order early to stay on track.

By following these steps, you can ensure a seamless window replacement process that aligns with your project timeline and performance needs.