Decks, Fences & Outdoor Structures
Outdoor structures that pass inspection and stay safe.
Decks, Fences & Outdoor Structures proves you can inspect, repair, and build exterior structures with correct materials, fasteners, and connections — including the ledger and railing details that cause real-world deck failures. Everything below is free — no login, no paywall. Work through the skill areas, drill them in Study Mode, and when you're ready, prove it with the certification exam.
Your readiness to certify
Drill all 0 concepts in Study Mode. Mark each one “Got it” once you know it cold. When every concept is cleared, you're ready for the DEK exam.
What you'll be able to do
- Deck anatomy: footings, posts, beams, joists, ledger, and decking
- Ledger attachment and flashing — the number one deck failure point
- Structural connectors, joist hangers, and approved fasteners
- Pressure-treated lumber, composite decking, and fastener compatibility
- Guardrail and handrail height, spacing, and load requirements
- Stair stringer layout, rise and run, and landings
- Board replacement, rot repair, and deck resurfacing
- Fence post setting: concrete, gravel, and frost depth
- Gate building, sag correction, and hardware selection
- Cleaning, sealing, staining, and maintenance schedules
Skill areas
Jump to any area — each lesson teaches the system from the ground up, then recaps the key takeaways you'll drill in Study Mode.
Studied the material? Get DEK certified.
The Decks, Fences & Outdoor Structures exam turns what you just learned into a verifiable credential drivers and shops can look up. 45 questions · 60 minutes · 75% to pass · $19.99.
Studying here is free forever. There's no obligation to take the exam.
Real-world cost guides for this system.
See what customers pay for the jobs this track teaches — parts, labor hours, and state-by-state ranges from our repair cost estimator.