Posted by Premium Decking Supply on Jun 23rd 2026
How to Estimate TimberTech Railing Materials Before You Buy
Railing is the one part of a deck budget that almost always catches people off guard. It's not just top rail and balusters - a complete TimberTech railing order includes posts, post skirts, infill sections, stair components, and all the hardware that holds it together. Get the count wrong and you're placing a second order mid-install.
Linear Footage Is What Matters - Not Square Footage
Railing is priced and ordered by the linear foot. A 16x20 deck typically needs around 52 linear feet across three open sides. That's your starting number, and everything else builds from there: collection choice, infill type, post spacing, and whether you have stairs.
TimberTech Railing Collections: Four Categories, Very Different Costs
TimberTech organizes its railing lineup by material type - PVC, composite, metal, and premium vinyl - and the price difference between them is significant over a full perimeter run.
PVC collections like Pinnacle Rail and Statement Rail sit at the top of the range. No wood fiber means no moisture risk, no swelling, and a longer service life in tough climates. Composite (Classic Composite Series) is the most flexible option - four infill types including cable, glass, and aluminum balusters - and the most popular starting point for homeowners balancing budget with quality. Impression Rail Express in aluminum installs faster than any other system in the lineup thanks to its pre-assembled panels. Reliance Rail in vinyl is the most accessible entry point, kit-based and DIY-friendly.
Don't Skip the Stairs
Stair railing uses angled sections and different hardware kits than flat deck railing. It's a separate calculation - and if you lump it into your perimeter total, you'll be short on parts.
Get Your Full Estimate Before You Order
Premium Decking Supply's free TimberTech Railing Calculator handles all of this in one place. Enter your deck dimensions, pick your collection and infill type, add stairs if needed, and an itemized material list with projected costs goes straight to your inbox.