Unilock Fence Installation Nationwide

Unilock Fence Installation: The Redwood City Owner’s Guide

Unilock fence installation in Redwood City typically runs $3,500-$9,000 for a complete vinyl or aluminum system, depending on linear footage, terrain, and whether we’re anchoring into existing hardscape or cutting new footings. We stock Unilock-compatible posts, rails, and hardware for same-day repair on most series, and we carry the full catalog for new installs with a written price before any work starts. Most Redwood City homeowners first notice trouble when a post leans after winter rains saturate the clay-heavy soil on the Peninsula, or when a rail pops loose because the bracket screw holes have wallowed out from thermal expansion cycles.

Call (650) 560-7228

Which Unilock Models This Applies To

Unilock fences are sold in modular series, and the parts are not interchangeable between lines. The U-Grip privacy system uses 5-inch square posts with a hidden rail channel; the Moda ornamental line uses 2-inch round aluminum posts with face-mounted brackets; and the Sierra composite line uses a proprietary clip system that locks into routed posts. Check the post cap or the inside face of the bottom rail for a stamped series code and manufacturing date. Pre-2019 U-Grip posts used a thinner wall thickness, 0.060-inch versus the current 0.080-inch, so replacement posts from that era need to be matched by year or the rail engagement will be loose.

We source OEM Unilock posts and rails through the manufacturer’s distribution network, but for hardware, we often spec heavy-gauge stainless aftermarket brackets that outlast the original zinc-coated versions in Redwood City’s marine-influenced climate. The OEM brackets are fine inland; within three miles of the bay, we’ve seen them corrode through in four to six years. We note the origin on every quote so you know what you’re getting.

Signs Your Unilock Fence Installation Is Failing

• Post leans or wobbles at the base. In Redwood City, this usually means the concrete footing has cracked from soil expansion during our wet winters, or the post itself has rotted at grade if it’s an older wood-composite hybrid. The fix is excavation, footing replacement, and proper drainage backfill, not just pushing the post upright again.
• Rail pops out of the post channel repeatedly. The locking tab on the rail end has fatigued, or the post slot has spread from thermal cycling. Unilock vinyl expands roughly 1/8 inch per 10 feet on a 40-degree temperature swing, which Redwood City sees regularly between summer afternoons and foggy mornings.
• Gate drags or won’t latch. The hinge barrel has ovalized from the weight of a gate hung without proper diagonal bracing, or the post has settled unevenly. We check plumb with a 4-foot level; anything over 1/4 inch out of true will eventually destroy the hinge or the latch strike.
• Discoloration or chalking on the surface. Unilock’s titanium-dioxide UV cap breaks down after prolonged exposure. South- and west-facing sections in Redwood City show this first. It’s cosmetic until the cap is gone; then the substrate absorbs moisture and the structural wall weakens.
• Bracket screws spin freely without tightening. The pilot holes in vinyl or aluminum posts have stripped from repeated seasonal movement. We drill and tap for the next screw size, or install threaded inserts that won’t back out again.

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Replacement Cost & What’s Included

The range on a full install depends on three things: how much we have to remove and haul away, whether we’re cutting into existing concrete for footings or working in open soil, and whether the grade changes enough to require stepped panels or custom rack cuts. Every quote from Rowan Construction Group Redwood City is a flat written price with a written scope and a written warranty. Under Clause 1 of the Haven Standard, that price is delivered before anyone picks up a tool. No change proceeds without a signed change order, which is the discipline that has kept our projects within a few percent of the agreed cost since 2007.

DIY or Call Us?

An owner can safely check whether a post is plumb and whether screws are tight. Do not attempt to reset a post with a concrete footing yourself; the excavation is shallow but the post is heavy, and a leaning post often indicates a failed footing that needs proper drainage gravel and a new pour to code depth, which in Redwood City is 24 inches minimum for fences over 6 feet. We’ve been called to jobs where a homeowner dug by hand, hit a sprinkler line, and turned a $400 post replacement into a $2,000 multi-trade repair.

Gate alignment is another place DIY goes wrong quickly. The adjustments are millimeter-sensitive, and forcing a latch to engage when the post has settled will destroy the strike plate or the gate frame. We bring laser levels and the right shims; most homeowners don’t. If you’re unsure, call (650) 560-7228 and we’ll schedule a free estimate with a written price before any work starts.

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