A deck inspection determines whether a project meets required safety and construction standards before it can be approved for use. Inspectors evaluate specific details tied to code compliance, load performance, and installation methods, not general appearance. Small issues can lead to a failed inspection and require corrections if they are not addressed correctly.
Understanding how a deck inspection is conducted helps set clear expectations and supports better decisions before, during, and after construction.
Stair and Guardrail Compliance Checks
Inspectors begin with components that present the highest safety risk. Stairs and guardrails receive close attention during every inspection.
Stair Compliance Review
Inspectors look closely at stair compliance, including the rise and run of each step and the nosing on the stairs. Consistency across the entire stair run is critical. Inspectors also verify that a landing is present at the base of the stairs, as required by code.
Guardrail Height and Strength
Guardrail height is measured carefully during inspection. A residential deck in the United States is required to have a 36-inch-tall guardrail on the deck surface and guardrails measuring between 34 and 38 inches on the stairs.
Inspectors also verify guardrail strength. The system must be able to withstand a 200-pound concentrated load at the top rail and a 50-pound horizontal load per square foot across the railing system.
Deck Inspection Guardrail Attachment
Inspectors review how the guardrail system is attached to the deck framing. The focus is on whether the guardrail or railing system can withstand the required loads when force is applied at the top rail and across the system. Inspectors look closely at how the system was assembled and how it transfers load into the structure.
Their goal is to confirm the guardrail meets both height and load requirements and is installed in a way that performs as intended under real-world conditions.
Pro Tip: Guardrail height and load resistance are both evaluated during inspection. Meeting one requirement without the other can result in corrections.
House Envelope Protection Inspection
Inspectors look very closely at house envelope protection to ensure there is no potential for water entrapment. This is one of the most crucial aspects of the inspection process. If water can become trapped where the deck connects to the home, it can create long-term issues.
The inspection focuses on how the deck interfaces with the house and whether the construction methods prevent moisture from being retained over time.
Key Takeaway: Inspectors place significant emphasis on house envelope protection and will evaluate this area carefully during inspection.
Need expert help with a deck project? Contact DW Decks for a free consultation and guidance through the inspection process.
Structural Framing and Foundation Components
Once safety and water protection are reviewed, inspectors evaluate the structural elements of the deck.
Piers and Post Connections
Inspectors look at pier sizes to confirm they were constructed correctly and previously inspected. They also examine post-to-pier connections to verify that the deck’s loads are properly transferred to the foundation.
Joist Hangers and Fasteners
Inspectors examine the joist hangers and the fasteners that hold the framing together. These connections are reviewed closely to confirm that the framing system was assembled using methods that provide proper structural support.
Inspectors evaluate whether the framing components work together as intended and whether the fastening approach supports the overall integrity of the deck.
Craftsmanship and Assembly Methods
Inspectors also evaluate overall craftsmanship and the methods used to assemble the deck. Even when a deck technically meets code, inspectors have discretion to determine whether the installation was completed professionally.
Building codes do not define every specific mechanism used to assemble a deck. Inspectors may review whether enough fasteners were used to secure multi-ply beams or framing members and whether the construction approach aligns with accepted professional practices.
Understanding Local Codes and Inspector Expectations
Passing inspection the first time requires accurate interpretation of building codes.
Deck Inspection Code Requirements
Johnson County residential deck guidelines and IRC deck guidelines are commonly used references. Each municipality may have its own adaptations or amendments to those codes, so requirements can vary by city.
Communicating With Building Officials
Local jurisdictions typically have a building official, a plans examiner, and field inspectors. These officials are generally open to answering questions. Reviewing the applicable guidelines and asking questions helps ensure codes are interpreted correctly before construction begins.
Final Inspection Results and Feedback
During the final visit, the field inspector determines whether the deck passes or fails inspection. If the deck does not pass, the inspector explains why and identifies what needs to be changed to meet requirements.
This feedback provides clear direction on what adjustments are needed so the deck can pass inspection on a subsequent visit. Contact DW Decks to make sure your project is prepared correctly before the deck inspection.
