How to Install Deck Rail Balusters
Balusters or pickets are the rail components used to provide infill for deck guardrails. IRC code prohibits guardrails from having any openings that would allow a 4" sphere to pass through. This rule produces the need for an attractive and economical repeated system for filling in the openings between rail posts and rail top and bottom members.
Because of the spacing requirement, you will need a lot of pickets or balusters even for a short length of rail. Use our baluster spacing calculator to calculate proper spacing based on your railing dimensions. Balusters will certainly be the most expensive rail component for your project. Years ago, most deck builders used wooden 2x2s nailed to the deck rim and top rail to meet the requirement.
4. This slide shows two options for baluster spacing on straight or angled rail sections. The lower 2x4 example shows placing the dark black center mark (to the right) between two balusters. This will provide more even spacing next to the rail post. The upper 2x4 example shows installing a baluster at the center mark. This will result in the end balusters being placed too close to the rail posts.
Glass Deck Railing Ideas and DIY Installation Tips
All glass panels used for deck railings must be safety-tempered and shatter-resistant. Learn how to install glass railing panels and get ideas for your deck.
Parts of a Deck Railing
We discuss the different components that compose a wood deck rail system. Learn about rail posts, top and bottom rails, balusters and a top cap.
Attaching Rail Posts
Step-by-step instructions for installing rail posts to your deck frame.
Deck Skirting
Skirting can be an attractive feature that can be added to any low-level deck.
Deck Stain Color Ideas & Inspiration
Choosing a stain color for your deck can feel overwhelming. Get inspired with deck stain color ideas and options.
Best DIY Outdoor Shower Ideas & Designs
Outdoor showers are perfect for cleaning off after the beach or pool. Here are some of our favorite DIY outdoor shower ideas. Find inspiration at Decks.com.
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Explore Articles by Topic

Footings
Information related to installing frost footings for decks

Framing
Learn structural framing methods

Decking
Learn about wood and composite decking materials

Stairs
An in-depth look at the complex issue of how to build stairs

Railings
How to install guardrails and handrails to meet IRC code

Features
An overview on water drainage, benches, planters and lights

Design
The basics of deck design

Planning
Learn about permits and working with contractors

Porches & Patios
Build a covered deck to enjoy all seasons

Ledger
Proper attachment techniques

Care
Maintain your deck to maintain your investment

Materials
An overview on water drainage, benches, planters and lights