A deck can support a pergola only when the load path and attachment are appropriate. The deck boards themselves are usually not the structural answer.
Start with the constraint
Pergola posts need to transfer gravity and wind loads into framing or foundations capable of carrying them. Surface-fastening only to deck boards can be inadequate.
What changes the decision
Large aluminum or louvered systems can impose meaningful uplift and overturning forces even if their vertical weight seems modest.
What to verify before buying
Have the deck framing and footings evaluated for the exact pergola. Confirm approved brackets, fasteners, waterproofing around penetrations, and local permit requirements before drilling.
How we research pergolas
We prioritize material specification, roof system, published wind and snow engineering, span, drainage, anchoring, installation requirements, warranty, accessory ecosystem, and total configured cost. Local building codes and site-specific engineering take priority over general product claims.
Prices, specifications, firmware, and configuration-driven features can change. Check the current manufacturer page and local requirements before buying or installing equipment.