How To Build a Pergola on An Existing Composite Deck? – Here Is Everything You Need to Know

Have you decided to build a pergola on your deck? Do you want it to look gorgeous and appealing? Here are the multiple steps to follow to create an exquisite pergola. A pergola adds beauty to any home and helps define the structure of the deck or patio. This freestanding garden gem creates a more inviting backyard and protects from the sun and rain.

Pergola can make your deck more attractive and become an excellent place for living and create a good mood in your home. Choosing the best deck pergola not only makes you feel comfortable in the summer but also gives your deck a sense of unity and completeness. The article will tell you how to build a pergola on an existing composite deck with two simple steps.

It is better to install a pergola on a new composite deck. But what if you can't do it? Now we will let you know how to build a pergola on an existing composite deck.


What Is a Pergola?

Porches are outdoor structures and arbors, often built as open-sided roofed structures that extend from a home, patio, or garden wall. Pergolas are popular in both contemporary and traditional architectural styles. The word "porch," while sometimes used synonymously with pergola, usually refers to a covered area that sits directly on the front of a home or as part of a porch.

A pergola is a freestanding structure, not attached to your home or property, and typically features open sides, whereas a porch is usually enclosed. Pergolas traditionally have crossbeams, rafters, and trellises but are more often built with latticework.

Some pergolas are screened to block out or deter unwanted visitors, such as insects or unwelcomed guests. Pergolas and gazebos both allow plenty of light through, making them useful outdoors.


How to Build a Pergola on an Already Existing Deck:

  1. Choose Great Hardware

What type of hardware do you need to build a pergola? If you already have your pergola plans, you can use this project as a template for your hardware. The hardware naturally depends on the dimensions of your pergola. For example, a 10 x 10 pergola would require a 10 x 10 pergola kit.

  • Determine the dimensions of your pergola. If you don't know the exact dimensions, measure the area around the deck or patio where the pergola will go.
  • Determine the type of pergola you want. There are several types of pergolas. A pergola kit might consist of the construction materials to build the supports and rafters and accessories like lattice, trellis, and posts. Most pergola kits are available with galvanized or powder-coated steel.
  • Determine the type of hardware you need. For example, if you plan to use lattice, you will need post brackets, lattice clips, and lattice brackets.
  • Purchase the hardware. Look for kits from a reputable supplier. Garden centers typically sell pergola kits, but you might prefer an online store.


What are the Few Tips for Making Your Deck Pergola Safe and Sturdy

Deck pergolas are great for shade on hot summer days, but they can be dangerous if they're not installed correctly. Wood and composite materials can rot when exposed to moisture. And decorative metal fixtures like Wrought Iron Fences and railings can become dangerously slippery when wet, leading to falls and injuries.

  • Use quality materials. Composite material is increasingly popular because it's low maintenance and holds up well in outdoor conditions. But composite decking can warp under extreme moisture and heat, so it's essential to keep it from direct sunlight.
  • Install a drainage system. If you want your deck pergola to provide a comfortable place to sit, consider installing a drainage system that will catch any water that drips down from the ceiling.
  • Install handrails. Handrails are a must, especially if you're putting your deck pergola near a deck or stairs.
  • Use materials that stay dry. Metal or wrought iron fixtures are attractive, but they can get slippery when wet. Wood and plastic fixtures are durable, but they also need to be protected from moisture.
  • Install proper components. Even if you're using composite materials, it's important to use features designed for outdoor use.
  • Don't skimp on support. Even though pergolas are benches, they're supposed to bear the weight of the people who sit on them, so use enough support material to hold up the importance of everyone.
  • Use proper fasteners. Screws are better than nails. Nails can split the wood, and screws are more durable.


Few Things to Consider Before Building a Composite Wood Pergola:

  1. Location. A pergola is an outdoor structure that can support a lot of weight and withstand harsh weather conditions. It shouldn't be built in an area that gets a lot of wind. A pergola also requires good drainage and shouldn't be built near water.
  2. Structure. It should be reasonably robust. But it doesn't have to support structural loads like a roof – means a typical pergola doesn't use wood beams. Instead, it relies on posts supporting the beams and rafters that hold the rays and provide shade.
  3. Loads. Pergolas can support a lot of weight and withstand harsh weather conditions. But a pergola isn't designed to help structural loads. That means it will deflect instead of the bend under stress. A pergola could also act as a battering ram in an earthquake, knocking over trees and other nearby structures.
  4. Drainage. A pergola can't be built near water, and it must be made on a slope to improve drainage.
  5. Materials. A pergola is made from wood, typically cedar, redwood, or pine.
  6. Framing. The beams in a pergola must extend beyond the tops of the posts.


Tools Required to Build a Composite Wood Pergola

Pergola is a roofed structure of Composite wooden beams and columns supported on posts. Pergolas are commonly found at the entrance of a house. Its construction is durable and long-lasting.

Pergola comes in different designs. You have to choose from various techniques depending on your needs and the space you have.

The design and space of your pergola will also determine the number of materials and tools needed.

  1. Composite Wood Pergola

The wooden pergola requires few tools, space, and money. Composite Wood pergolas can be built quickly and do not require professional expertise. A Composite wood pergola can be constructed using some nails, a hammer, and a saw. It is easy to install, dismantle and repair.

The cost of a Composite wood pergola depends on the Composite wood used. It needs less space than a metal pergola. It also does not rust or rot.

  1. Steel Pergola

Steel pergolas are easy to install, dismantle and repair. They are durable, sturdy, and long-lasting.

Steel pergolas need special tools and space. It would help you more precisely if you had some metal sheets and nails to build a metal pergola.

Some metal sheets are specially designed and pre-fabricated to make pergola construction easy.

  1. Pergola Kits

Pergola kits are pre-fabricated pergolas that you can buy from stores or online. They do not require professional expertise because they are easy to install.

They are constructed using some nails, a hammer, and a saw. Pergola kits are durable and long-lasting.

  1. DIY Pergola

You can build a DIY pergola yourself without the help of a professional. A DIY pergola can be constructed using some nails, a hammer, and a saw.

Moreover, you will need the following tools as well:

  • Circular Saw
  • Jigsaw
  • Pencil
  • Measuring Tape
  • Levels
  • Framing Square
  • Hammer
  • Nail Set
  • Measuring Cup
  • Miter Saw
  • Level
  • Carpenter's Chalk
  • Work Gloves


How To Build a Composite Wood Pergola? – Step by Step Guide


  1. Find a place to start building. Start by deciding where to put a pergola. This can be on the roof of your house, attached to your home, or freestanding.
  2. Measure the space. Measure the width of the area and length where you want to put the pergola. For freestanding pergolas, you have to decide where to locate the posts. Use stakes to mark where the posts will go.
  3. Dig holes for the posts. Dig holes at least 48 inches (121 cm) deep. The holes should be at least 6 inches in diameter (15 cm).
  4. Erect the posts and drive the shafts in. Erect the poles and dig out the holes a bit deeper. Drive the posts at least 8 feet (2.4 m) into the ground.
  5. Attach the rafters to the posts. Attach the rafters to the posts with lag screws.
  6. Attach the columns. The columns support the top beams. Attach the columns to the posts with lag screws.
  7. Once the posts are secured in place, place all the beams on top.
  8. Use a level to make sure the beams are straight.
  9. Add in the lattice to create the pergola.
  10. Use a staple gun to attach the lattice to the beams.
  11. Add any finishing touches, such as flowers or vines, for added decor.
  12. Enjoy your new Composite wood pergola!


Take Away:

Pergolas are among the most beautiful outdoor structures you can add to your home. From their look, you can tell they are most closely associated with Mediterranean architecture and romantic Italian villas. However, pergolas can also be built using modern construction techniques, and there are many pergola design ideas you can use.

When building a Composite wood pergola, the roof is probably the most complex part. You'll want to use Composite pergola beams, not trusses because they're more flexible. Trusses restrict the pitch of your roof, which limits how much the top can flex.

Here we have described how to build a Composite wood pergola on an existing composite deck. This is the most easy way to get your favorite pergola build.

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