Therma-Tru Fence Installation Nationwide

Therma-Tru Fence Installation: The Sunnyvale Owner’s Guide

We stock and install Therma-Tru-compatible vinyl and composite fence systems in Sunnyvale, with typical installed pricing running $3,500-$9,000 depending on linear footage, terrain, and whether we’re tying into an existing gate or post layout. Most Sunnyvale homeowners discover their Therma-Tru fence needs attention when the bottom rail bows after winter rains, a post cap cracks in the summer heat, or the latch assembly on a Tru-Lock gate seizes with accumulated Silicon Valley dust. The telltale sign is usually movement: a panel that used to sit plumb now leans toward the property line, or a gate that once self-closed now drags along the decomposed granite path common in Sunnyvale’s Lakewood Village and Birdland neighborhoods.

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Which Therma-Tru Models This Applies To

Therma-Tru’s fence line breaks into two series most relevant to Sunnyvale installations: the Tru-Lock Privacy system and the earlier Tru-Post line, which was common in new construction here from roughly 2012 to 2019. The Tru-Lock uses a 5-inch × 5-inch post with a routed pocket system; Tru-Post used a simpler bracket-and-screw assembly that is now largely discontinued. You can identify your series by checking the post cap underside: Tru-Lock caps snap into a molded receiver, while Tru-Post caps were friction-fit and often show hairline cracks at the corners after five or six seasons of Santa Clara County’s thermal cycling.

We carry OEM-grade replacement rails, post caps, and gate hardware for both series, plus cross-compatible alternatives from our broader stock that meet or exceed the original spec. For the discontinued Tru-Post line, we source reinforced composite alternatives that match the 1.5-inch wall thickness and UV-stabilized capstock, not the thinner vinyl imports that chalk and fade within two years in this sun exposure. Under Clause 1 of the Haven Standard, we put the part numbers and per-linear-foot pricing in writing before any removal starts.

Signs Your Therma-Tru Fence Installation Is Failing

• Bottom rail bowing or detachment from the post pocket. This happens when water collects in the rail’s internal chamber, expands during our brief freeze events, and separates the rail ends from the post routing. In Sunnyvale, poor drainage against the fence line is the usual culprit, not defective material.
• Post cap cracking or UV chalking. The capstock layer on early Tru-Post caps was 0.015 inch, which degrades to a powdery white residue after about six years of direct south or west exposure. We replace with 0.025-inch capstock minimum.
• Gate latch misalignment that worsens seasonally. Thermal expansion in the Tru-Lock gate frame shifts the striker plate by 1/8 to 3/16 inch between our 45°F January mornings and 95°F August afternoons. Persistent binding means the frame itself is racking.
• Panel rattle in wind events. The pocket-and-rail connection loosens when the post settles in our expansive clay soils, common west of Mathilda Avenue. The noise is the symptom; the post plumb is the problem.
• Discoloration in bands or streaks. Hard water from sprinkler overspray leaves mineral deposits that etch the capstock. This is cosmetic until the etching penetrates to the substrate, at which point the panel loses its flexural strength rating.

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Replacement Cost & What’s Included

What drives the range: terrain slope (retaining or stepping adds labor), access for our auger between structures, and whether we’re matching discontinued colorways like the Tru-Post Sand or Wheat tones that were popular in Sunnyvale’s 2014-2017 builds. Every quote lists material cost, labor hours, and any subcontractor scope separately. The 365-Day Done Right Promise covers installation; manufacturer defects are handled through the OEM warranty channel we document on your invoice. No change order is executed without your signature, which is the discipline that has kept our projects within a few percent of the written price across 4,000-plus jobs since 2007.

DIY or Call Us?

What you can safely check: confirm the post is plumb with a 4-foot level, verify the rail hasn’t slipped from its pocket by pressing upward on the center of the panel, and clear debris from the gate track. These checks cost nothing and tell us whether you’re looking at a $200 adjustment or a full panel swap.

Where DIY goes wrong: driving replacement posts in our clay-heavy soil without a gas-powered auger leads to inadequate depth and frost-heave failure. Cutting Tru-Lock rails to length requires a fine-tooth blade at low speed; a standard circular saw melts the capstock and voids the warranty. And the Tru-Lock pocket system depends on precise post spacing (72 inches on center, not 73, not 71) - a 1-inch error accumulates across three panels into a gate that won’t close. We’re not affiliated with Therma-Tru; we’re an independent installer with the parts on the truck and the written scope in hand. Call (650) 405-3637 to schedule your free estimate.

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