How We Build a Deck That Lasts 25+ Years

Trex composite deck installation in Glenview, IL with hidden fasteners and picture framing

At Diamond Decking, we proudly serve homeowners throughout Chicago’s North Shore and surrounding suburbs, including Glenview, Wilmette, Northbrook, Lake Forest, and Naperville. Whether you're in the city or nearby towns like Schaumburg, Barrington, or Long Grove, our expert team delivers high-quality deck and patio installations tailored to your outdoor living goals.

Building a deck isn’t just about nailing boards together — it’s about craftsmanship, structural integrity, and long-term performance. At Diamond Decking, we specialize in building high-end composite decks using Trex and TimberTech materials, built to withstand the Midwest’s harsh climate and deliver decades of enjoyment.

Whether you're in Lake Forest, Wilmette, Glenview, Naperville, or anywhere across Chicagoland, here's how we build decks that truly last.

1️⃣ Foundation: Deep Footings That Resist Frost Heave

Every long-lasting deck starts below the surface. Our deck footings are set 42” deep or more, exceeding local frost line requirements to prevent shifting and cracking due to freeze-thaw cycles. For additional stability, we offer Diamond Pier foundations, an advanced footing system with galvanized steel rods that anchor deep into the ground for unmatched support and frost resistance.

2️⃣ Ledger Board Installation: Secure & Safe Attachment

The ledger board connects the deck to your home — and it must be flawless. We use FastenMaster LedgerLOKs to tie into your home’s floor joists, ensuring the frame is securely supported. For added safety, we include Simpson Strong-Tie tension ties on elevated decks, reinforcing the ledger board and protecting against lateral movement.

3️⃣ Framing: Premium Lumber & Expert Engineering

We only use #1 or #2 grade Southern Yellow Pine for framing. Each board is hand-selected to avoid warping, ensuring your deck is flat and level. Where needed, we plane joists to eliminate thickness variations that can create “wave effects” in composite decking.

  • Joists are spaced 12” or 16” on center (depending on material).

  • Blocking is added throughout for lateral strength and long-term durability.

  • All beams and posts are installed with galvanized post bases to prevent movement and moisture damage.

TimberTech deck framing and joist installation by Diamond Decking in Northbrook.
Custom Trex Transcend railings with post cap lighting on a composite deck in Wilmette, IL

4️⃣ Decking Installation: Trex & TimberTech Done Right

We install Trex and TimberTech boards using hidden fasteners for a clean, seamless look and maximum hold.

  • Perimeter boards and breaker boards are installed with color-matched screws for a finished look.

  • Boards are spaced precisely at ¼” to allow airflow and prevent moisture buildup.

  • Deck skirting and picture framing available for enhanced aesthetics.

5️⃣ Fascia & Skirting: Details That Elevate the Design

Once the deck boards are installed, we wrap the rim joist with composite fascia, color-matched to your decking. Optional vertical deck skirting is available for a custom, elevated finish. These details are what separate ordinary decks from high-end outdoor spaces.

6️⃣ Railings & Lighting: Safety Meets Style

We offer a wide range of Trex Signature, Select, and Transcend railings, along with TimberTech options. Popular features include:

  • Cocktail railings for entertaining

  • ADA-compliant handrails for accessibility

  • Post cap lighting, stair riser lights, and under-rail LED systems

  • Dimmer controls for ambiance

Every railing is fastened with ThruLok or Thrubolt connectors, ensuring code-compliant weight resistance and safety.

7️⃣ Custom Touches & Final Walkthrough

We finish each project with a full inspection, ensuring every board, screw, and fixture meets our Diamond Decking standards. Optional features include:

  • Built-in benches

  • Pergolas

  • Outdoor kitchens

  • Fire pits

  • Drainage & water management solutions

Why Choose Diamond Decking?

✅ Built to Last 25+ Years
✅ Premium Trex & TimberTech Materials
✅ Engineered for Harsh Midwest Winters
✅ Flawless Aesthetics & Structural Integrity
✅ Trusted by Homeowners Across Chicagoland

📞 Ready to build your dream deck?
Get a free quote today and discover why homeowners across Wilmette, Naperville, Schaumburg, Lake Forest, and beyond trust Diamond Decking.

Deep concrete deck footings and frame installation for a Trex deck in Lake Forest, IL

🛠️ Frequently Asked Questions – Building a Composite Deck

❓ How long does it take to build a custom composite deck?
The timeline depends on the deck size and complexity, but most projects are completed in 1–2 weeks after permits and materials are finalized.

❓ What's better—Trex or TimberTech?
Both are top-tier composite decking brands. Trex is known for its rich wood-like textures and sustainable materials, while TimberTech offers PVC-capped decking with enhanced moisture resistance. We help you choose the right fit based on your budget, style, and needs.

❓ Do you handle permits and inspections?
Yes. We handle all permits, inspections, and code compliance for your city, whether you're in Lake Forest, Northbrook, Wilmette, or anywhere across Chicagoland.

❓ Can I customize the design of my deck?
Absolutely. Every deck we build is custom. You can choose from various layouts, board patterns, railings, lighting, fascia styles, and add-ons like built-in seating, planters, or privacy walls.

❓ Are composite decks worth the investment?
Yes. Composite decks require less maintenance, last 2–3x longer than wood, and boost home value—making them one of the best outdoor investments you can make.