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Wooden Pergola with Footing

How Deep Do Pergola Footings Need To Be?

Does a Pergola Need Footings?

Footings are vital for a sturdy pergola. They provide stability and support against the elements. Essentially, footings are concrete blocks buried underground to anchor your pergola, preventing it from toppling over during wind or bad weather. Footings distribute the weight evenly, preventing uneven settling and instability. They also resist uplifting forces, ensuring your pergola stays rooted in place during strong winds. Additionally, footings protect against frost heave, which can cause shifting or cracking. Proper footing depth is crucial for long-term durability.

Pergola Footings

Aluminium Pergola With Footing

Footing Depth - What you'll need for an Aluminium Pergola:

Before you dive into any groundwork, it is best to first pick the size of your snazzy new pergola. Once you've got that sorted, you'll get detailed floor plan for your chosen model, dictating where the footings need to be.

The next step will be to put down some concrete pads, generally about 40cmx40cmx40cm, under your tiles or similar surfaces. This will vary based on the weight and size of the exact model, and it if you're purchasing one of our Aluminium Pergolas, we will give you exact requirements. If you're installing onto a deck, you can do the same or add in some extra joists below the deck to fix to.

Then, when the pergola pros roll up, they'll be able to drill right through your tiles or decking and attach each footplate to those pads or joists beneath. Voilà! A rock-solid foundation for your pergola, with all fixings entirely hidden by the footplate.

Aluminium Pergola With Sofa

How deep do pergola posts need to be? What you'll need for a Wooden Pergola

Naturally, wooden pergolas are generally far heavier than Aluminium Pergolas, and therefore require deeper, more substantial footings. For wooden pergolas, a minimum footing depth of 24 inches is recommended, generally of concrete. Wood type, pergola size, and local codes may influence this requirement. Pressure-treated lumber allows for slightly shallower footings (18-20 inches), but untreated or naturally rot-prone wood demands deeper footings. Consulting local codes and professionals is essential for precise footing depth when it comes to wood.

Wooden Pergola With Footing

Who Can Install Pergola Footings?

Hiring a licensed contractor, builder, landscaper, landscape architect, or skilled handyman, and providing them with the proper floorplans and details, will set you up for perfect footings. Professionals ensure compliance with local codes, guaranteeing long-term stability and safety for your pergola. Investing in professional assistance with the foundations will give you peace of mind.

Aluminium Pergola With Pool

What If I Want My Pergola Installed on an Existing Patio or Decking?

No problem! 

This is very common. Your chosen professional will be able to lift the relevant patio stones or decking boards, install your footings underneath, and relay them - ready for install!

Aluminium Pergola On Patio


Getting your pergola footing depth is critical for the safety, stability and longevity. Aluminium Pergolas typically require footings of 40cm x 40cm x 40cm, while wooden pergolas need far more, often us much as 24 inches in depth. Factors like wood type, size, and local codes will influence footing depth. Hire a professional, give them the floorplan and requirements, and set yourself up for success!

Aluminium Pergola with Sofa

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Passionate about helping people create spaces they enjoy, with the people they love. Incredibly knowledgeable on all things aluminium pergola. Loves spending time in her garden with her husband, her pup Ronald and a glass of wine!

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