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InsightHorizon Digest

What is the best type of wood to use for a pergola

Author

Andrew Mccoy

Updated on April 09, 2026

Western Red Cedar and Redwood are the two most commonly used woods for pergolas, aside from pressure-treated wood. Western Red Cedar (WRC) and Redwood are both naturally stunning woods and often lumped together.

What kind of wood should I use for a pergola?

Western Red Cedar and Redwood are the two most commonly used woods for pergolas, aside from pressure-treated wood. Western Red Cedar (WRC) and Redwood are both naturally stunning woods and often lumped together.

Should I use 2x6 or 2x8 for pergola?

To adequately support the lumber overhead as well as give the pergola a sturdy look, you’ll probably need to use 6×6 for the support posts. For a very small pergola with only 4 to 6 feet between posts, 4×4 supports will work.

Do you have to use pressure-treated wood for a pergola?

One of the most common types of wood used for pergola construction is pressure-treated pine. Pressure-treated pine, the most affordable option, is rot and insect resistant. However, a preservative will need to be applied after construction to slow the process of weathering.

How long will a wood pergola last?

With limited maintenance, expect a wood pergola to last about five years. You can improve its lifespan to 10 to 12 years with annual cleaning, staining or sealing.

What material do I need to build a pergola?

  1. Four long beams of your choosing, usually 4×4 (standard) or 6×6 (for more heft)
  2. 2 x 4 beams.
  3. 2 x 6 beams.
  4. 2 x 10 beams.
  5. Galvanized deck screws.
  6. Hammer.
  7. Ladder.
  8. Shovel.

Can I use treated pine for a pergola?

The types of timbers that are suitable for your pergola are hardwoods, treated pine or cypress pine. … The majority of pergolas are made using treated pine. Treated pine timber should have an H4 rating for on, or below ground, application and an H3 rating for above ground.

How long will a pressure-treated pergola last?

Provided you do the correct maintenance, however, a pressure-treated wood pergola can be a fantastic option for many homeowners and will give you up to 12 years of solid performance before you start to see any structural issues.

What is better pressure-treated wood or cedar?

When it comes to comparing treated wood vs. cedar, pressure-treated wood is the sturdier and more weather-proof of the two. It’s highly resistant to insect attack and rot, and special versions rated for “ground contact” can be buried in soil and will continue to shrug off decay for decades.

What size timber should I use for a pergola?

For the uprights you will need at least 75mm x 75mm (3” x 3”) timber, and 100mm x 100mm (4” x 4”) is better if it is to be a sizeable structure. The uprights need to be around 3m (10ft) long, as they will need sinking into the ground by 0.5m (2ft) to give a firm foundation.

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How far can a 2x8 span for a pergola?

The IRC 2018 does not specify a maximum span for pergola beams. Because of this, it is best to go by the standard rule and multiply the depth by 1.5. This would give you 12 feet. You may be able to get away with another 1 to 2 feet depending on the species and grade of the wood but should avoid going past that.

How far can a 2x8 span without support?

In general, a 2×8 will span 1.5 x 8, so 12-feet. Based on all factors though, a 2×8 joist span is 7′-1” to 16′-6”, and a rafter 6′-7” and 23′-9”. In this guide, we’ll explain what span means in terms of construction, factors that impact the span, and how much weight a 2×8 can support.

What is the best height for a pergola?

The minimum height of a pergola should be no lower than 7’6” to provide enough head room, though most projects call for a range of 8-10′ in height. A lower ceiling feels right-sized for intimate gatherings, while a larger roof is more in scale with a larger structure.

Is it better to paint or stain a pergola?

Is it Better to Paint or Stain a Deck, Fence, Gazebo etc? There are some stains that do protect against UV damage. However, in comparison, paint is still superior in its protection. Both stain and paint will protect the wood from most forms of moisture.

How much would a pergola cost to build?

The cost to build a pergola usually ranges between $2,200 and $5,900, or $4,000 on average. You could spend as little as $1,300 on a basic build while you may pay as much as $10,000 for a custom design.

Do pergolas add value home?

Here’s what we tell our customers: yes, a pergola will add market value to any house. Since outdoor living has become more popular than ever, the value of properties with a pergola or a comfortable outdoor space has been on the rise. A safe gauge for a deck or backyard improvement is about 50% — 80% for your ROI.

What size should pergola rafters be?

Geoff, a builder friend, once said that for a smaller sized pergola, with 4″ x 2″ rafters, the pergola beam span should be no bigger than the width of a standard fence panel, or 6ft. Good advice! Try to keep as near to that as possible.

Does painting treated pine make it safer?

Studies of the ingestion of the arsenic fixed to timber by treatment on animals have shown that the modification of the arsenate greatly reduces it’s toxicity. … Painting of the treated pine will also assist with reducing any potential for dislodgeable arsenic, further protecting you from any potential hazard.

Is it cheaper to build your own pergola?

One of the best things about a DIY pergola is its moderate cost. A DIY pergola usually will cost less than more complex outdoor structures such as patio covers and gazebos, yet more than arbors and trellises. As with any DIY home project, you pay only for the materials, not for the labor.

How much does a 12x12 pergola cost?

A typical 12×12 pergola will cost between $4,320 and $8,640 depending on your choice of materials and style.

Do I need footings for a pergola?

A pergola doesn’t need footings or concrete to support itself, but its posts will need to be buried into the ground or anchored with heavy-duty concrete anchor bolts to prevent them from toppling over in high winds.

What is cheaper pressure treated or cedar?

On average, cedar deck planks cost between $3 and $7 per square foot, while regular pressure-treated lumber costs between $2 and $5 per square foot. In general, cedar costs about 20% to 30% more than pressure-treated lumber. … Additional materials (other than boards)

How long will untreated cedar last outside?

In outdoor structures that are not in contact with the ground, such as decks, gazebos, pergolas and fence boards, cedar may last 30 years or longer. When in contact with the ground, such as when it’s used for fence or support posts, it can last between 15 and 20 years.

Do I need to seal cedar?

Cedar offers a durable option for exterior and interior building projects with natural resistance to rot and decay, so a protective finish is optional. … If you’re using cedar for an outdoor project, give it a light seal coat to guard against moisture and sunlight.

Are pergolas worth it?

A pergola extends your living space and increases the amount of time you can spend outside. Designed and oriented correctly on your lot, a pergola can cast enough light shade to make even a warm afternoon enjoyable or if you still need additional protection, you can install a retractable shade cover for more shade.

How often should you Restain a pergola?

How often should I stain or seal my pergola? If you’ve opted to stain or seal your pergola, the frequency of re-staining and re-sealing your pergola depends on your climate and the type of stain or sealant you choose. Timeframes range from every year to every 2-3 years.

How long does cedar pergola last?

How much maintenance you do determines how long your pergola will last. If you stain it every year, you can expect it to give you 10 to 12 years of performance. However, if you never stain it, it’ll succumb to rot and mold in about 5 years.

How far can a pergola beam span without support?

There’s not quite enough information here to give a definitive answer, but for decks, a rule of thumb is when supporting joists that span 12 feet, a double ply beam can span in feet a value equal to its depth in inches. Thus, a double 2×12 beam could span 12 feet – with 20′ beams, posts at 10′ might look the best.

How deep do posts need to be for a pergola?

Dig holes in the locations for the pergola’s posts, making each hole at least 12 inches in diameter and the depth of one-third the height of one post. If, for example, each post is 12 feet tall, then make each hole 4 feet deep.

How big can a pergola be with 4 posts?

A very small pergola may use 4 x 4 inch posts as long as it has less than 4 to 6 feet between posts. As a general rule of thumb the depth of hole you use for your posts should be approximately 1/4 of the height of your post.

What size lumber can span 13 feet?

A 2×6 spaced 16 inches apart can span a maximum distance of 13 feet 5 inches when used as a rafter, 10 feet 9 inches when used as a joist, and 6 feet 11 inches when used as a deck beam to support joists with a 6-foot span. What is this?