A deck generally lasts 10 to 30 years depending on material and maintenance. Exposure to weather is the biggest factor affecting lifespan.
Average lifespan of a deck
Pressure‑treated wood decks typically last 10–20 years. Composite decking can last 20–30 years or more.
What affects how long a deck lasts
Moisture, sun exposure, and freeze‑thaw cycles accelerate wear. Proper sealing and drainage are essential.
Signs a deck needs replacing
Soft or rotting boards, loose railings, rusted fasteners, and structural instability are warning signs.
How to make a deck last longer
Regular cleaning, sealing, and prompt repairs help prevent moisture damage.
When replacement is necessary
Replacement is necessary when structural supports deteriorate or widespread rot weakens safety.