Patios are an amazing option for enjoying some outdoor time alone or with your friends and family. You can relax in your own space and enjoy the weather. However, the weather will not always be pleasant and according to your choice, which is why you can make your patio more comfortable by attaching a roof to it. If you want to learn how to attach a patio roof to an existing house, here are some amazing tips.

Tips to Attach a Patio Roof to an Existing House

Here are the complete 10 processes of putting together a patio roof without hiring any professional help. 

1. Material Required

Adding a patio to an existing home is tough, but that doesn’t mean it’s impossible. However, if you have no expertise in this work, consider getting help from a professional. Before installing the patio cover in your home, here is the list of materials you will need:

  • Nails 
  • Nail gun
  • Beams (Wooden) 
  • Wooden Boards
  • Rafters (Wooden)
  • Shingles
  • Black roof felt 
  • Screwdriver 
  • Draw bolt 
  • Board with oriented strands 
  • Ledger
  • Putty Knife 

2. Preparatory Measures

Calculate the headroom of the line of sight from roof to house. Then decide the size of the beam you will be using. After that, select the roof slope and structure. Since the roof will be installed on top of the existing roof, deciding whether to remove or retain the existing eaves is necessary. When removing, it must be ensured that the integrity of the entire structure is not compromised. Next, determine the number of joists, rafters, and roofing boards required for your design. 

3. Installation of the First Rafters 

Once you have finalized the preparatory measures, attach the first rafters to the beam. This is usually done by passing through the roof covering and nailing or screwing into the top stanchions at one end of the house. If your house does not have such stanchions, you should instead use a joist hanger or a bridge plate for a fixed header. 

4. Installation of the Second Rafters 

Nail another rafter at the bottom edge, which is the same height as the top edge of the previous rafter. This creates two small gaps where you meet at the tip. Place an additional horizon every 16 inches until you have enough left and right spans to cover the width of the patio roof. Wood patio covers are best for safety and beauty.

5. Ridge Board Installation 

You can now proceed toward the installation of the ridge plate. This is a simple flat piece of wood that extends from end to end and supports the rafters above. Install it so that the bottom edge is level with the top edge of the previously installed horizon, but do not place it on top. This creates space for the underlying insulation. This step is usually not required if you find maximum space between the joists and stanchions to hang or bridge the panels. Hence you can simply proceed with the installation and cutting of horizontal lines. 

6. Cutting and Installing Horizontal Lines 

Nail an additional horizontal line every 16 inches across the opening until it covers an area equal to the desired vertical dimension plus 12 inches. You will need to install them long enough to add 12 inches to the width, and after that, you can cut the extras. Cut the horizon to the desired length and nail it in place. Continue at 16-inch intervals until you cover a large enough area equivalent to the width of the roof plus 12 inches. Finally, you need to install all the required end rafters and nail the side rafters to all four sides. This can further support the sloping parts of the patio roof.

5. Installation of the End rafters

After installing the horizontal lines, you need to install the rafters. To do this, first, measure the exact length of the house from the ground where the roof of the patio will be installed. You can consult an expert for accurate measurements and cut two rafter boards to that length at the same time. Install the end rafters with the help of a nail gun or screws as needed. However, be careful not to hit the wires at the time of installation of the end rafters. Then, you can move the installation of the end rafter directly without using any additional steps.

6. Installation of the Side rafters 

After installing the end rafters, the next major step is to install the side rafters. Side rafters are usually evenly distributed on all four sides, and they balance the weight while stabilizing the slopes of the roof of the patio made of metal or wood material. This tends to warp over due to extreme weather conditions, and hence it keeps the entire structure intact. It is also designed to remove the gap in the center of the roof where the rainwater usually stands up and drops from the openings afterward. Hence this keeps the structural integrity of the entire patio intact without any possible risks.

7. Installing the Overhang 

At the last step, you can now proceed toward installing the overhang. It is the most crucial stage, so you have to be extremely cautious. The spacing used to attach the roof depends on the type of house, but it is generally set to match the rafters, so there are no gaps between the rafters. This prevents the asphalt single from slipping because there is no “gap” underneath to collect water, making it easier to install later. Follow the instructions of an expert as per the condition of your home before proceeding to install the gable trim or overhang. 

Final Thoughts

Follow the process shared above step by step to install a patio roof to an existing house in the best possible way and without any hassle. If you face any issues during the process, you can always get professional help from a contractor. So, what are you waiting for? Start gathering the material you need and get started on the task. But make sure to follow the process carefully to avoid any problems. 

Read more about Best roof design for tropical climate.

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