How to Attach a Patio Roof to an Existing House & 10 Amazing Ideas



Backyard cozy patio area with attached roof to existing house & wicker furniture set

Learning how to attach a patio roof to an existing house would be a great way to spend your spare time. After that, you can begin the project right away and paste it on your own.

Enjoying a relaxing atmosphere of the outdoor on your patio is a great idea. However, it will not be as enjoyable as you think if the area has no roof. The glare of sunlight and the rain will be a disturbance to your restful time. Without a cap, you cannot even call it resting.

That is why having a roof on a patio is very important to protect the area from the heat and rain. Besides, it also underlines the dwelling place. Let us find out how to attach a patio roof to an existing house.

The Most Common Ways

How to Attach a Patio Roof to an Existing House

Actually, you can choose so many ways of how to attach a patio roof to an existing house. This process entails the intermediate skills of carpentry and creativity. Make sure that you already have some for this project before the process begins.

Let us focus on some of the most common ways of how to attach a patio roof to an existing house. These methods have their own drawbacks and advantages. You can choose the one that suits your style and skills.

1. Fixing the Back Channel

This is one of the ubiquitous methods of how to attach a patio roof to an existing house. It is quite an easy method to try. In this way, you need to strengthen the backchannel and fascia boards. In order to do that, reinforce two rafters into the cap.

Even though this way is convenient and plain, you cannot go high or low.

2. Making the Attached Patio Roof a Bit Higher

This method of how to attach a patio roof to an existing house is so similar to the previous one. The difference is on the height. The cap needs to be set a little bit higher. In order to do that, you have to remove the gutter of the building. Then, place the backchannel a little higher than before.

Since it has no gutter, you should install transfer flashing to the patio from the roof. Height over 100 millimeters can be added.

3. Installing Some Riser for Heights

If needed more height, this method of how to attach a patio roof to an existing house allows you to reach the elevation you want using some riser brackets. In addition, this way requires a custom barge cap. The ceiling can be lifted up to 2 feet.

In fact, you can also provide divers cool selections to have a nice final appearance and restful atmosphere. If you wanted to add some natural light to the patio, choose the opaque twin-wall sheeting. It will allow many lights to come inside the area. It even comes in sundry colors and styles.

You will only need one sheeting to get the light. Just install it between the barge cap and the patio roof. The natural lighting will pass through. For a cleaner look, add some flashing wall covering as an extra. Then, seal the brackets.

4. Letting the Air Flow

The project’s main purpose of how to attach a patio roof to an existing house is to protect the space from the sunlight glare and the splash of rain. However, it will obstruct the flow of the air sometimes.

Well, there is another way to keep the space protected from rain’s splash while letting the airflow. All you need to do is to set the sheeting over topmost of the roofing. Set it about 300 millimeters in order to perform a shield from the spatter. There is no need to block the flow of the air anymore.

It is a great recommendation if your fully covered patio needs some airflow.

5. Getting the Cleanest Look

You can try this simple method of how to attach a patio roof to an existing house to give a clean look to space. It will also perform better rain protection. Just attach the area and the backchannel right to the building wall. It does not require a lot of effort to do.

6.  Raising it by 500 Millimeters

If the height provided by the previous method does not really meet your specification, this way of how to attach a patio roof to an existing house might be it. You can lift the roof up to 500 millimeters. Dismiss the fascia, eaves, and gutter. Then, cut the back of the rafters to the wall line.

7. Having a Neat and Tidy Look

To make the patio roof neat and tidy, you can continue the previous method of how to attach a patio roof to an existing house. Then, set FHS columns on the wall topmost. After that, reinforce the area to the rafters. Place the beam on topmost of the height wanted.

To make sure everything is watertight, you will need the custom barge and gutter to be installed properly.

The Materials and Steps of How to Attach a Patio Roof to an Existing House

Steps of How to Attach a Patio Roof to an Existing House

This project is not going to be an easy task but it does not mean that you are not able to do it. If you do not have the proper skills of carpentry, get some help from experts.

Here are some materials to prepare:

  • Nails
  • Nail Gun
  • Wooden Planks
  • Ledger
  • Wooden rafter
  •  Utility Knife
  • Lag Bolts
  • Wooden Beams
  • Roofing shingles
  • Screwdriver
  • Black roofing felt
  • Oriented strand board

Steps of how to attach a patio roof to an existing house:

Here are some steps you have to understand and follow carefully in order to succeed in the attaching method. Do not forget to apply the methods you have learned in these measures of DIY patio roofing.

  1. Begin the project of how to attach a patio roof to an existing house by measuring the sightline clearance height. You need to do it from the roof to the house, not vice versa.
  2. Measure the beam size.
  3. Choose whether to remove or keep the eave.
  4. Fasten the base of the post to the ground using a screwdriver and lag bolts.
  5. Cut one of the horizontal roof beam sides on an angle.
  6. Use the nail gun to attach the horizontal beam. Make it equal with the house roofing. Trim the external rafters.
  7. Assemble the outer rafters and attach the rafter beam to the house roof edge.
  8. Cut the house ends while in the process of installing the rafters in order to make them fit perfectly.
  9. After all the rafters installed properly, form the roof of the patio. You need to attach the planks in a horizontal way across the beams.

10 Patio Roof Ideas

You can explore these as references to apply the steps of how to attach a patio roof to an existing house previously.

1. Canvas Shade Sail

Canvas Shade Sail Patio

Using this kind of material for a patio roof would create a simple yet elegant design. It underlines the space a lot.

As a result, the patio gets a more exquisite look. Besides, the canvas shade sail can also be a protection to the space to let you enjoy the backyard view entirely.

It comes with the curtain tracks to attach to the beams. The canvas shade can be adjusted to the desired angle. It is such a flexible roof; you can even draw it back in order to get the natural light needed.

Look for how to attach a patio roof to an existing house using canvas shade material.

2. Translucent Fiberglass Patio Roof

Translucent Fiberglass Patio Roof

This material would make a nice patio roof because it is very versatile. Fiberglass is flexible and lightweight. Therefore, it is quite favorable when becoming a patio roof. The price will not be a problem for everyone.

They can buy the material at a cheap price to make their patio look more beautiful. The curvy style makes an interesting scene in this outdoor space.

Using fiberglass material, you can find out how to attach a patio roof to an existing house by professionals.

3. Metal Roofing

Metal Roofing Patio

Having a metal patio roof for your outdoor space offers many advantages. Durability is one of them. This material is also well known for its resistance to high snows and winds. It offers the best security from such things.

A metal roof is rather mild. That is why people like to install this because it is easy. However, the downside of this material is the price. It must be something that could make a hole in your pocket. The expensive price is due to the quality of durability.

4. Tempered Glass Patio Roofing

Tempered Glass Patio Roofing

This material is so different from the fiberglass roofing. It is like the real glass that allows the natural light in through the roof. It feels like there is no top covering even though it protects you from the snow and rain.

Tempered glass material has one thing that others do not. It is transparency. While you are in the patio, enjoy the view of the surrounding without being worried about rain or snow. However, prepare for the high price.

5. Japanese Style Roof

Japanese Style Patio Roof

This kind of roofing style in a patio really represents the Japanese style of a house. It has the wooden pillars that buttress the uncovered blocks. This type features a latticework that extends the characteristic of it.

The natural light is still able to pass through but you will get the partial cover from that. To complete the Japanese touch, there are some traditional lanterns hanging from the structure. It underlines the patio with style.

Another element that you must have nearby an Asian space is the bamboo plants. Make sure you have some around.

6. Pergola Style Roof

Pergola Style Roof

This outdoor pergola consists of distressed wooden posts and beams. Both of them have such a rustic look that does appear so stylish. That ornamental style of a patio roof really complements the exposed brick wall. The entire element seems to be on the same path.

Some other features like the exposed beams and the carved edges complete the charm of the entire building.

7. Beige Pergola Style

Beige Pergola Style

The soft beige color of the patio is the highlight of this outdoor space. It really complements the surroundings pretty well. This pergola design gives a lot of natural light into the area. That makes it partially shaded. Sitting there would allow the warmth of the sun enjoyed by you.

8. Full Protection Patio Roof

Full Protection Patio Roof

As the name suggests, this patio roof could give the full protection of a space. It will make sure you are safe from the sun, rain, and snow. This kind of top covering uses metal roofing. As you can see, this suits the house design so much.

It attaches directly to the wall, just like the steps of how to attach a patio roof to an existing house in this post recommend.

9. Sleek Design of Patio Roof

Sleek Design of Patio Roof

A patio roof with sleek design is something people are looking for in their house. Your clean and luxurious dwelling place would have an astonishing outdoor space for parties or family gatherings. The ambiance will complement the modern look of the building.

One of the reasons designers choose to have this patio roof is for aesthetic purposes. As you can see, this one does not cover the entire area. That would let the water drop on the banquet table. If the protection is something you do not really care about, it is a perfect selection.

10. Patio Roof with Modern Design

Patio Roof with Modern Design

Another way to achieve a modern touch from a patio roof is to have a minimalist concept. Just like the picture proposes. What so unique about this roofing is the structure. As you can see, it looks like floating.

It is because only a single post and the house wall support the roof. That makes this minimalist patio roofing so eye-catching. It also features a tongue-and-groove ceiling that complements the fence so well.

The post and the frame of the ceiling do the same to the wooden fence. Entirely, this patio appears humble yet graceful. The plants beside the space play an important part to add naturalness to the ambiance.


How was it? Are you ready to do the project on your own? Alternatively, just hire professionals or experts to assist. Well, those steps of how to attach a patio roof to an existing house are easy to follow.

Just grab all the materials and follow them carefully. There are some fantastic ideas on the patio roof. You are free to choose which one to inspire your project. Your decision could lead to a successfully attached patio roof.

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