Struxure Pinnacle Rail® Solid Square Balusters Infill

This PVC railing system combines aluminum-reinforced durability with solid square balusters and hidden fasteners for contractors who need low-maintenance railings that can handle Montana winters. The system requires no sanding, staining, or sealing and resists cracking, chipping, rotting, swelling, fading, splitting, mold, and mildew.

The screw-together rail design works for residential decks, commercial outdoor spaces, and high-moisture environments like pool decks. Backed by a 25-year limited product warranty, this system addresses the maintenance headaches that plague wood railings in harsh climates.

What Sets This System Apart

The aluminum core reinforcement inside the extruded PVC rails changes the strength equation. With a top rail profile measuring 3.5 inches by 1.875 inches, these rails handle snow loads better than hollow PVC alternatives. The system comes in 6-foot sections with 13-inch balusters or 8-foot sections with 18-inch balusters.

The hidden stainless-steel fastener system eliminates visible screws while allowing contractors to adjust baluster spacing on-site. That flexibility matters when dealing with odd deck dimensions or code requirements for baluster gaps.

The solid square balusters measure 1-1/4 inch nominal width — not hollow tubes that can crack or collect water. The lightweight PVC construction makes handling easier than wood or metal alternatives, which translates to faster installation and less crew fatigue.

Specification	Value
Top Rail Profile	3.5” × 1.875”
Rail Lengths	6 feet, 8 feet
Baluster Width	1-1/4 inch nominal
6’ Section Balusters	13 inches long
8’ Section Balusters	18 inches long
Color Options	White (Matte finish)
Warranty	25-year limited

Installation Reality Check

The screw-together design starts with selecting your rail length and installing post sleeves (5” × 48” or 108”) with 3/8” wall thickness and adjustable shims. Trim rail sections to exact on-center measurements if needed, then secure everything with the hidden stainless-steel fastener kit.

Some contractors report tight tolerances with the square balusters in pre-drilled holes, which can cause scratches during installation if rushed. Take your time. The hidden fastener system requires precision — this isn’t a slam-it-together product.

The system only works with TimberTech Pinnacle Rail components. That means using their post sleeves, caps, skirt rings, and gate kits (36” or 42”). No mixing with other manufacturers’ parts.

Frequently Asked Questions

Can this railing system handle Montana’s temperature swings and snow loads?

Yes — the aluminum-reinforced PVC core provides structural integrity while the material resists cracking, chipping, rotting, swelling, fading, and splitting. The system specifically resists mold and mildew, addressing Montana’s freeze-thaw cycles and spring moisture.

What comes in the kit?

Each kit includes the 3-1/2” rail with aluminum reinforcements, solid square PVC balusters (13” for 6-foot sections or 18” for 8-foot sections), stainless-steel hidden fasteners and screws, plus footblocks.

Can I paint these rails a different color?

Yes — the pre-finished matte white surface can be painted for custom colors. Use exterior PVC-compatible paint and proper primer for best results.

How does this compare to traditional wood railings?

Unlike wood, this system offers a milled-wood appearance without rot, splintering, or maintenance requirements like staining and sealing. The 25-year warranty backs up the durability claims — try getting that warranty on cedar railings.

Will the tight baluster fit cause installation problems?

Some contractors report challenges with tight-fitting square balusters in pre-drilled holes, potentially causing scratches. Precise, careful installation prevents damage. This isn’t a rushed job — plan accordingly.