Before buying: measure the real slab/deck, verify permit and wind/snow requirements locally, and confirm current model specifications with the manufacturer. PergolaSpec has not physically tested every product listed.
Aluminum is a category, not a specification
Useful product pages disclose member dimensions, finish system, fastener material, anchoring requirements and model-specific limits. Alloy labels and wall thickness can help, but structural performance depends on the complete engineered assembly—not one metal number.
| Check | Why it matters | Question to ask |
|---|---|---|
| Finish/coating | UV, salt and scratch durability | What finish standard and warranty exclusions apply? |
| Fasteners | Dissimilar-metal corrosion and serviceability | Which fastener material is included? |
| Integrated drainage | Water exits columns instead of the seating area | Where exactly does each outlet discharge? |
| Model span | Controls post layout and usable opening | Is the dimension outside-post or roof-edge? |
Freestanding does not mean foundation-free
A freestanding kit still transfers uplift and lateral load into footings or a verified slab. Confirm base-plate edge distance, concrete thickness/strength assumptions and whether anchors are included. For decks, get site-specific structural guidance.
Next comparison
If adjustable rain control is the reason for choosing aluminum, continue to louvered pergola kits. If convenience is the goal, compare motorized controls separately.