15 Modern Deck Railing Ideas and Designs
Get inspired with 15 of our favorite deck railing ideas to complete your dream deck.
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Classic
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T-Rail
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Aluminum
Price Range
$$
Limited Residential Warranty
Select® Classic Railing
The simple choice for your outdoor space.
Color:
Charcoal Black Balusters & Classic White Rails
Price Range
$$
Limited Residential Warranty
Select® Composite T-Rail
The ideal blend of composite performance and vinyl affordability.
Color:
Charcoal Black Balusters & Classic White Rails
Price Range
$$
Limited Residential Warranty
Select™ Aluminum Railing
A simplistic style that can complement any outdoor space at an affordable price.
Color:
Charcoal Black
Discover Why Trex Select® Railing is the Best Choice for Deck Railing
Designs for Every Style
From sleek modern to timeless classic, we're here to make your outdoor space uniquely yours.
Easy-to-Use Tools
Trex’s design tools let you plan, price, and explore railing styles from home—quick and easy.
Installation Made Simple
With step-by-step guides and Trex Academy resources, we’ve got everything you need to DIY.
Peace of Mind
With Trex railings, skip the painting and staining—just enjoy lasting beauty with 15–50 year warranties.
Personalize Your Look
Choose from curved railings, cocktail rails, lighting, or ADA options to make your space just right for you.
Your Project, Our Priority
Our Customer Care Team is here to support you every step of the way throughout your deck project.
Railing Anatomy
Click on the hot spots below to explore the core components of a railing system.
Composite Post Sleeve
A post sleeve slides over your wood post, protecting it from the elements. Choose our durable composite option for ease of installation and long-lasting beauty.
Post Cap
Top off your railing with a post cap. Our caps provide a polished finish and add durability, protecting against weather and wear.
Post Skirt
A post skirt adds a finishing touch at the base of your post. Designed for elegance and protection, it hides unsightly gaps and enhances your railing's look. Opt for our skirts for seamless integration and aesthetic appeal.
Aluminum Post
An aluminum railing post is a vertical support used in railing systems to provide stability and structure. Resistant to rust and corrosion, our powder-coated aluminum posts offer strength without sacrificing a minimalist design.
Balusters
Balusters provide both safety and style to your railing. Whether you prefer square composite or round aluminum, our options offer superior durability and design versatility.
Top Rail
The top rail is the uppermost part of the railing system, providing support to the balusters and a secure grip for users. Choose our classic design for a timeless look or upgrade to the composite "T-top" rail for enhanced grip and comfort, blending functionality with style to elevate your space.
Bottom Rail
The simple, sturdy bottom rail is the backbone of your railing system. Our bottom rails provide essential support and stability, ensuring long-lasting performance.
Pre-assembled Panel
A pre-assembled railing panel is a railing kit that comes with balusters or an infill option already installed on the top and bottom rails, simplifying your railing installation process.
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Infill Options
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Posts & Post Components
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Rails, Balusters & Infill Specs
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Accessories
Classic Rail with Round Aluminum Balusters
Use for simplified, pre-designed rail applications.
View our Railing Guide to learn more.
T-Rail with Round Aluminum Balusters
Use for simplified, pre-designed rail applications.
View our Railing Guide to learn more.
T-Rail with Square Composite Balusters
Use for simplified, pre-designed rail applications.
View our Railing Guide to learn more.
All-In-One Post Sleeve Kit
Choose the all-in-one composite post sleeve kit in classic white to create a clean, classic smooth finish over your structural post.
Kit Includes:
1 composite post sleeve, 1 composite post cap, 1 composite post skirt in Classic White
Post Sleeve Kits are compatible with Trex Select Composite Railings only.
*Railing kits and brackets sold separately.
1. Post Sleeve
Each 4” x 4” and 6" x 6" post sleeve fits over a 4" x 4" pressure treated post or equivalent post mount.
6" Available in Classic White only.
4” X 4” X 39”/108” Actual External Dimension:
4.45” x 4.45” x 40” (113mm x 113mm x 101 cm)
4.45” x 4.45” x 108” (113mm x 113mm x 274 cm)
6” X 6” X 39”/108” Actual External Dimensions:
5.5” x 5.5” x 39” (139 mm x 139 mm x 990 mm)
5.5” x 5.5” x 108” (139 mm x 139 mm x 274 cm)
2A. Post Sleeve Cap
12 per box. Cap topping each post is the decorative finish that also withstands the weather.
6” Available in Classic White only.
Actual External Dimensions:
4” x 4”: 4.55” x 4.55” (115 mm x 115 mm)
6” x 6”: 5.55” x 5.55 ” (140mm x 140mm)
2B. Post Sleeve Skirt
12 per box. Finishing piece at the base of the post that covers any cuts where the decking and railing meet. Usually coordinates with the cap.
Actual External Dimensions:
4” x 4”: 4.55” x 4.55” (115 mm x 115 mm)
6” x 6”: 5.55” x 5.55” (140mm x 140mm)
*6" post sleeve skirts exclusively available in Classic White and are offered as a single piece (not pictured).
3. Classic Rail & Round Aluminum Baluster Kit - Horizontal/Stair
Includes top rail, bottom rail, round aluminum balusters, adjustable foot block, hardware pack.
Dimensions
6’ x 36” Classic Rail & Baluster Kit
8’ x 36” Classic Rail & Baluster Kit
6’ x 42” Classic Rail & Baluster Kit
8’ x 42” Classic Rail & Baluster Kit
*Actual lengths: 6’ Rail: 72” (171 mm); 8’ Rail: 96” (232 mm)
3. T-Rail & Round Aluminum Baluster Kit - Horizontal/Stair
Includes top rail, bottom rail, round aluminum balusters, adjustable foot block, hardware pack.
Dimensions
6’ x 36” Classic Rail & Baluster Kit
8’ x 36” Classic Rail & Baluster Kit
6’ x 42” Classic Rail & Baluster Kit
8’ x 42” Classic Rail & Baluster Kit
*Actual lengths: 6’ Rail: 72” (171 mm); 8’ Rail: 96” (232 mm)
3. T-Rail & Square Composite Baluster Kit - Horizontal/Stair
Includes top rail, bottom rail, square composite balusters, adjustable foot block, hardware pack.
Dimensions
6’ x 36” Classic Rail & Baluster Kit
8’ x 36” Classic Rail & Baluster Kit
6’ x 42” Classic Rail & Baluster Kit
8’ x 42” Classic Rail & Baluster Kit
*Actual lengths: 6’ Rail: 72” (171 mm); 8’ Rail: 96” (232 mm)
Mounting Hardware for Cut Rails—Horizontal
Contains:
Qty (8) Bracket to Post Fasteners
Qty (12) Bracket to Rail Fasteners
Qty (4) Railing Brackets
Mounting Hardware for Cut Rails—Stair
Contains:
(8) Bracket to Post Fasteners
(12) Bracket to Rail Fasteners
(4) Railing Brackets
(4) Railing Bracket Stair Adapters
8' Aluminum T-Rail Stiffener (IRC)
Used to strengthen and stabilize the 8' rail. IRC-compliant applications only. Compatible with top T-rail only.
Contains:
(1) Aluminum Rail Stiffener
Not sure where to start?
Checkout our planning tools and resources
Get Inspired
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Benefits of Composite Deck Railing
Explore the advantages of composite deck railings in our in-depth railing guide. You'll discover how composite railing designs offer superior safety, upkeep, curb appeal, and functionality compared to wood railing systems.
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How Trex Makes DIY Deck Railing Easy
Discover the top ways to simplify your deck railing ordering and installation with Trex.
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Deck Railing Ideas Picture Gallery
Sometimes it's tough getting started on deck railing ideas. With so many options to choose from, you may not know where to begin when planning and building a deck rail. From fresh, monochromatic looks to railing that provides a sharp-yet-stylish contrast to your decking materials, your choices are limitless.
Read Article
See Similar Looks
Check out these additional railing options from Trex to help you find the best fit for your space
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