21" x 45¾" Fixed Deck-Mounted Skylight Laminated Glass - white

BA-FX-R-21-45.75
21" x 45.75"

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21"" x 45¾"" BA-FX-R Fixed Deck-Mounted Skylight Laminated Glass

The 21"" x 45¾"" BA-FX-R Fixed Deck-Mounted Skylight is a fixed daylighting skylight with tempered-over-laminated Low-E glazing and a white-finished frame sized to match current U.S. standard rough openings. Its simple, durable construction delivers long-lasting, trouble-free performance, making it a practical choice for new installations and replacements alike.

Suitable for sloped roofs with a pitch between 15 and 85 degrees, the BA-FX-R uses a pressure-treated wood frame that resists moisture, rot, and decay, finished with two layers of acrylic lacquer for lasting appearance.

Why Choose 21"" x 45¾"" BA-FX-R Fixed Deck-Mounted Skylight Laminated Glass?

  • Standard-Size Replacement Fit: The white-finished Replacement Line frame matches current U.S. standard sizes, simplifying new installs and skylight replacements.
  • Tempered-Over-Laminated Glazing: Tempered over laminated Low-E glazing with argon gas and warm TGI spacers balances strength, safety, and thermal performance.
  • Trouble-Free Fixed Design: A simple fixed design with no moving parts offers long-lasting, low-maintenance performance in high ceilings.
  • Durable Wood Frame: Pressure-treated wood resists moisture, rot, and decay, finished with two layers of acrylic lacquer.
  • Strong Energy Numbers: A low glazing U-value of 0.19 and skylight U-factor of 0.39 support energy-efficient daylighting.

Not sure if the BA-FX-R is the right fit for your daylighting or replacement project? Our specialists can help you compare models, confirm specifications, and answer your questions. Ask our product experts today!

Key Product Specifications

  • Skylight Size: 21"" x 45¾""
  • Type: Deck-mounted fixed (non-opening) skylight, Replacement Line
  • Glazing: Tempered over laminated Low-E glass with argon and warm TGI spacers
  • Glazing U-Value: 19 (1.1 W/m2K)
  • Skylight U-Factor: 39
  • Visible Transmittance: 60
  • Frame: Pressure-treated wood, white acrylic-lacquer finish
  • Roof Pitch: 15 to 85 degrees
  • Note: Standard glazing rated for installation up to 3,000 feet above sea level
  • Application: Residential and commercial deck-mounted skylight openings and replacements

What Comes Standard and What Can Be Configured?

Every BA-FX-R ships with the following as standard:

  • Tempered-over-laminated Low-E glazing with argon
  • Fixed (non-opening) glazed panel
  • White-finished pressure-treated wood frame
  • Warm TGI pane spacers

The following are ordered separately or specified to match the installation:

  • Deck-mounted flashing kit matched to the roof covering (shingle, tile, or other)
  • Interior blinds and accessories

Energy Efficiency and Certification

The tempered-over-laminated Low-E glazing and insulated wood frame are designed for lower heat transfer and reduced energy use. For efficiency ratings and program eligibility, confirm the current ENERGY STAR listing for the specific size and glazing.

Need a different size, glazing, or configuration? Browse our full range of skylights and roof flashing kits to find the right fit for your project.

What to Know About Roof Opening and Installation Requirements?

Required Roof Opening

The BA-FX-R is deck-mounted into a framed roof opening sized to the skylight per the manufacturer's rough-opening data for your specified size. Because the Replacement Line matches current U.S. standard sizes, it is well suited to replacing an existing skylight. Confirm the opening, roof pitch, and roof covering before installation, and pair the skylight with the matching flashing kit.

Compatible Applications

This skylight is designed for sloped deck-mounted roof installations. Typical uses include:

  • Skylight replacement on existing openings
  • New residential daylighting
  • Commercial spaces needing natural light
  • High-ceiling fixed skylight openings

Installation Notes

  • Confirm the roof pitch falls between 15 and 85 degrees.
  • Pair with the correct deck-mounted flashing kit for the roof covering.
  • The Replacement Line frame matches current U.S. standard rough-opening sizes.
  • Standard glazing is rated for installation up to 3,000 feet above sea level.

Complete your installation with confidence. Our library of how-to articles and installation tips provides practical guidance, while our YouTube video demonstrations walk you through each step of the process.

Who Specifies BA-FX-R and Where Is It Used?

The BA-FX-R is typically specified by builders, roofing contractors, remodelers, and homeowners who need a dependable fixed skylight for new work or replacements.

Common applications include:

  • Skylight replacement projects - standard-size fit
  • Residential new construction - daylighting
  • Commercial interiors - natural light
  • High-ceiling spaces - low-maintenance skylights
  • Sloped-roof residential and light-commercial roofs

Get more from every order with Pro Club. Designed for contractors and facility professionals, the program offers exclusive pricing, priority support, extended return periods, and member-only resources that simplify procurement and keep projects moving.

Frequently Asked Questions About Fixed Laminated-Glass Skylights

  1. What is the Replacement Line?

It is the white-finished version of the FX fixed skylight sized to match current U.S. standard rough openings, which makes it convenient for replacing an existing skylight.

  1. What glazing does it use?

It uses tempered-over-laminated Low-E glass with argon gas and warm TGI spacers, balancing strength, safety, and thermal performance.

  1. What roof pitch does it suit?

It is suitable for sloped roofs with a pitch between 15 and 85 degrees.

  1. Do I need a separate flashing kit?

Yes. A deck-mounted flashing kit matched to your roof covering is ordered separately to weatherproof the installation.

  1. Is this skylight fixed or venting?

It is a fixed, non-opening skylight dedicated to daylighting, with no venting mechanism.

  1. Why buy skylights from Best Access Doors instead of a general marketplace?

Best Access Doors specializes exclusively in access solutions, so you get direct access to product specialists who can confirm sizing, glazing, and the right flashing for your roof.

Get the Right Fixed Skylight for Your Project

Source the right access solution for your project with confidence. Call +1-888-327-5471, request a quote, or browse our custom-sized access doors. Our team can help you identify the best configuration for your project requirements.

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Spec Sheet
BA-FX-R

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