Construction Process

Composite and PVC decking systems perform best when the structure beneath them is properly engineered and protected. Material choice matters, but framing layout, water management, blocking, and fastening strategy determine how the deck performs 10–20 years from now.

This page outlines how we build composite decks to meet manufacturer standards, local code requirements, and long-term performance expectations.

Diamond Pier DP50 mechanical footings are used for the majority of residential deck installations. Higher-capacity DP75 systems are installed when required by span, load, or site conditions. Traditional concrete footings are used only when structural design or project classification requires them.

All footing systems are selected based on soil conditions, load calculations, and long-term stability—not habit.

Framing layout determines long-term deck performance. Composite and PVC materials require tighter joist spacing than traditional wood decking. We frame according to manufacturer specifications, structural load planning, and deck orientation—not minimum convenience standards.

Joist spacing is adjusted based on span requirements, local code compliance, and board direction. When decking is installed at an angle, spacing is reduced to 12″ on center. Joists are crowned and aligned to minimize surface variation and reduce visible waviness.

Moisture protection is critical beneath composite and PVC decking. Horizontal framing members are protected with ZIP System flashing tape or equivalent moisture barrier to prevent long-term water exposure.

Ledger boards are attached using LedgerLOK or equivalent structural fasteners, spaced tighter than minimum code where appropriate for load transfer and durability. A drip edge flashing is installed behind siding and over the ledger to direct water outward. The rear ledger edge is sealed to reduce moisture intrusion.

Blocking provides structural reinforcement beyond simple alignment. We install bridge blocking for joist stability, picture-frame blocking for perimeter support, railing post blocking for structural anchoring, and angled or breaker board blocking when required by layout.

Perimeter blocking is typically installed at 16″ on center to match infill support. When decking is angled, spacing is reduced accordingly. Proper blocking increases rigidity, supports fastening systems, and maintains clean alignment over time.

Composite stair systems require tighter stringer spacing and additional tread support compared to traditional wood stairs. Stair framing is built according to manufacturer requirements and structural load expectations.

Stair design is coordinated with deck framing, picture-frame detailing, and railing integration to ensure structural performance and visual consistency.

We install proven composite and PVC systems including TimberTech, AZEK, and Trex. Material selection is based on performance, warranty structure, color stability, and Midwest freeze–thaw exposure—not appearance alone.

PVC decking offers reduced expansion force and superior moisture resistance. Composite systems provide durable, cost-effective performance when installed correctly. Product tiers and design considerations are reviewed during the structured project review process.

Fastening systems are installed according to manufacturer specifications to protect warranty compliance and long-term performance. Hidden fasteners are used on infill boards to allow controlled expansion and contraction.

Face-fastening and plug systems are used at perimeter boards to anchor expansion forces. Installation spacing is adjusted based on material type and seasonal conditions.

PVC fascia is secured using adhesive and mechanical fastening to minimize movement. Composite fascia is installed using slotted fastening patterns to allow expansion similar to siding systems.

Railing systems must be structurally anchored—not surface-mounted without reinforcement. Posts are reinforced with structural blocking and secured with code-compliant fasteners to meet load requirements.

We offer aluminum railing systems including TimberTech, Trex, and Westbury Tuscany C10. Glass panel systems are available where appropriate. Material selection is based on structural integrity, finish durability, and design compatibility.

Drink rails provide additional functional surface area but require reinforced top-rail framing and proper moisture management. Structural support and attachment methods are evaluated to prevent deflection and water intrusion.

Integrated lighting systems require pre-planning for wiring pathways and low-voltage protection. Lighting layout is coordinated during structural planning to avoid exposed wiring and retrofit modifications.

Built-in benches require additional framing reinforcement and load consideration. Seating is designed as part of the structural plan to prevent future sagging or movement.

Common installation failures include improper ledger flashing, insufficient blocking, loose railing posts, oil-canning fascia, and framing that does not match deck layout requirements.

Many decks deteriorate within 10–12 years due to moisture intrusion at the house connection. Structural detailing and disciplined water management significantly extend performance life.

Composite decking is low maintenance—but only when installed on a properly designed structure. We build to code or above and follow all manufacturer installation requirements to ensure long-term performance.

Proper structural planning, moisture management, and fastening strategy determine how the deck performs 10–20 years from now—not just how it looks on completion day.