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Build a portico – A functional and stylish addition to any home

Stone house with DIY portico
We show you how to build a portico over a door that you can customise for your house or garden shed, which also offers practical shelter from the rain.
  • Difficulty
    medium
  • Cost
    83-107 €
  • Duration
    > 1 d

Introduction

Adding a portico to the front of your house will not only help protect you from the elements, but it can also enhance the appearance of your entire home. In this article, we will show you how to build a portico with step-by-step instructions. You will also find numerous helpful tips and all the additional information you need to make this DIY project a complete success.

You need

Let's get started – Build a portico: step-by-step

In this guide, we will show you how to make a portico yourself. Before getting started, see the "Planning & Background Knowledge" for additional tips and information that can help you during the planning and building phase.

Are you familiar with our 18-volt-system? It includes devices for a wide variety of applications. All devices can be powered from the same detachable 18-volt battery repeatedly. Simply disconnect the battery, plug it into another device from the system and continue with the next step.

Pay attention to occupational safety at all steps to protect yourself and your health. You can find more important information in our DIY safety precautions guide.

Step19

Draw up the blueprints

Think carefully about what you want your DIY portico to look like, where you want to place it, how far it should extend and how steep the roof slope should be. It is best to draw a detailed blueprint before purchasing any materials.

Step29

Lay the foundation & set the posts

First, lay the foundation for the support posts. Screw-on base plates are suitable for this purpose – they are screwed into the ground and will support the two outer wooden posts of the canopy. When you add a portico to a house, the main concern is how it will hold up against the weather. The wooden posts need to be firmly anchored into the ground with sturdy base plates and industrial-strength screws.

Saw the posts to size with the help of a hand-held circular saw and a suitable workbench.

Now, position the posts in the base plates, ensure they are straight with the help of a spirit level or line laser and screw them in place with a cordless drill.

Step39

Assemble the beams

Build a portico: Sketch of the construction of a canopy with a 10-degree inclination

How to build a portico over the front door: the two front posts should be slightly shorter to account for a sloping roof.

 

 

For the next step, position two slightly longer beams against the outside of the door and screw them to the wall. Calculate a gradient of approximately 10 degrees. This will enhance the appearance of your wooden canopy and allow rainwater to drain effectively.

 

Step49

Attach crossbeams for the portico

Place the two crossbeams of your portico (parallel to the wall) and screw them to the four posts with angle connectors or long screws to give the structure stability.

Step59

Install the support beams for the roof

Build a portico: Diagram of the canopy with support posts, crossbeams and support beams

How to build a portico roof: Angle connectors can be used to attach the support beams to the crossbeams of the canopy.

 

Next, mount the support beams to the crossbeams with angle connectors. They support the roof. The distance between each beam should be around 50 cm. The bigger you want your canopy to be, the more support beams you will need. For example, for a narrow canopy with an approximate width of 100cm, a total of three support beams should be sufficient – two on the sides and one in the middle.

Step69

Attach roof battens (optional)

Optionally, you can now attach roof battens to the support beams (parallel to the crossbeams) for additional stability.

Step79

Treat the wood

Your DIY portico needs to be protected from the elements to ensure it continues to function as it should. That is why we highly recommend treating the wood before proceeding. Our guide on staining wood can help you with this step if you are unsure.

Depending on the type of wood, you may need to sand the wood with a multi-sander first before glazing.

 

Tips
How to use power tools correctly
If you do not have much experience with power tools, check out our video tutorials on saws and/or grinders. You’ll also find lots of useful information in our sanding guide.
Step89

Install the roof

Build a portico: Sketch of a finished canopy with a roof made of acrylic corrugated roofing sheets

This is what your finished DIY portico could look like with an acrylic corrugated roof.

 

 

Building a portico roof is incredibly straightforward. Once the support beams are in place and the glaze has completely dried, you can finally place your chosen roofing material and screw it into place. Acrylic corrugated roofing or twin-wall sheets, for example, are both suitable materials to use.

Finally, you should seal any gaps between the roof and the wall. More on this in the chapter "Planning & background knowledge".

 

Step99

Install the side panels and rain gutter (optional)

If you want to add extra weather protection, you could now add two side panels between the pillars. A rain gutter is also a sensible addition to allow any rainwater to run off the side and not the front entrance.

That is how to add a portico to your house in only nine steps!

Planning & background knowledge: How to build a portico with columns

In this chapter, we will answer frequently asked questions about porticos and provide useful tips that will help you successfully implement your vision.

What materials are suitable for building a DIY canopy?

If you are wondering how to build a portico entrance, one of the first questions you will be faced with is, what materials should I use?

As a portico does not have to carry a heavy load – unless you live in a very snowy area – you have a wide range of materials to choose from and you could also combine different materials. The table below highlights the advantages and disadvantages of the most common options:

Material Advantages Disadvantages
Plexiglass Transparent; covered entrance; shatterproof; inexpensive; resilient Susceptible to dirt
Glass Transparent; covered entrance Heavy; difficult to process; susceptible to dirt; prone to scratches
Wood Easy to process; comparatively inexpensive Maintenance-intensive; susceptible to weather damage
Metal / Steel / Stainless Steel Elegant appearance; high durability Costly; heavy; special tooling required
Concrete Stable; resilient Additional knowledge required; long drying times; building permit might be needed
Stone bricks High durability; complements a stone house Additional knowledge required; greater effort; building permit might be required
Sheet metal Low maintenance; robust; lightweight; waterproof Susceptible to corrosion; discolouration possible
Wood plastic composite (WPC) Wood appearance but with longer durability; assorted colours available; kits available Not natural wood

 

 

Where are porticos often installed?

Porticos are most often installed for the main entrance, which is why our guide focuses on how to build a portico over the front door. Other places where porticos are usually installed include garages and rear entrances. If you are planning to build your own garden shed, you could also incorporate a DIY portico here.

What if you need to know how to build a small portico above a door? Perhaps for a DIY playhouse for your children? Our guide avoids restricting you to exact dimensions and provides a general overview so that you can adapt the plans to any portico size, whether big or small.

What are the different types of porticos?

Build a portico: grey wooden house with gable canopy
A classic canopy with a gable can be installed without supports if it can be anchored well enough in the wall.

 

Not all canopies are the same and there are many distinctive styles to choose from. We have compiled some of the most popular types for you here.

Style Characteristics
Louvres Elegant, lets light in, combination of different materials possible
Portico with columns Many styles possible, from Greek to Victorian
Cantilever portico Space-saving; modern; self-build and assembly are more complicated
Contemporary style Combination of different materials and functions (e.g. climbing aids for plants); ideal for visually highlighting entrances
Extended canopies An extension of the roof with wooden roof tiles; supported or free-floating
Portico with side panels Wind and weather protection; extra privacy; additional stability
L-shaped portico or similar Particularly attractive as a partially self-supporting outdoor canopy with side wall; materials can be combined; privacy and wind protection provided

 

When should I use a premade kit and when does it make sense to build a portico yourself?

The answer to this question comes down to your manual skills and how much time you have available. A kit is a quick and comparatively cheap solution, however, when you build a DIY portico you have much greater freedom to choose the design. You can decide on the materials, size, appearance and all the smaller details. A complete kit from the store might be a more straightforward solution but it will lack that personal touch.

How do I make sure that my portico is secure?

Our guide shows you how to build a portico on a brick house and the steps you need to take so that it can withstand rain, wind and snow, as well as provide sufficient drainage. Pay particular attention to the connections and joints, particularly the roof and wall connection, and ensure there are no gaps or structural weaknesses.

To seal your roof, you can use sealing tape, rubber seals, expanding tape or silicone, among other solutions.

Do I need a building permit if I want to build a portico myself?

In most cases, you do not need any special permission to install a DIY portico. However, if your house entrance is directly on the street or a sidewalk, or if your project is particularly large, a building permit may be required. This depends on the local regulations that apply in your place of residence. Check with the relevant building authority or municipality well in advance of starting your project.

How can I avoid thermal bridges when drilling into the wall of my house?

If you want to build and install a portico, proper installation when mounting it to the wall is essential. Otherwise, damage to the thermal insulation can occur, which in turn can result in thermal bridges, also known as cold bridges. You should seek the advice of an expert if you are in any doubt. Under certain circumstances, separate sealing measures may be necessary.

How do I calculate how heavy the roof will be and whether the fastening can hold it?

If you want to know how to add a larger portico to a house, then you will first need to consider whether the materials you have chosen can hold the total weight. In addition to weight, you should also consider the impact wind and snow might have on the anchoring and overall structure.

The basic weights of your different materials can typically be found online for simple construction projects, but as soon as the project becomes more complex, it is advisable to consult a structural engineer. They will be able to give you a more definitive answer regarding the viability of your project.

Does my portico need a rain gutter?

Without a rain gutter, a DIY portico might not fully perform its primary purpose. Rainwater is likely to run down the sloped roof and directly over the entrance. A gutter that runs down one side or column can prevent this issue.

What incline angle should a canopy have?

A canopy with an incline of approximately 10° guarantees good water drainage while also looking aesthetically pleasing. Even for smaller projects - for example, a garden shed canopy - you should plan for an incline of at least 5°.

Cost: Building a portico

The cost of a portico depends on the specifics of your particular project. For example, if you are planning a small wooden canopy for the front door, the costs will be much lower than if you want to build a larger portico with supports over the entire terrace or if you want to create a large canopy with side walls, windows and doors.

Of course, it also makes a considerable difference whether you build your portico yourself or have a tradesperson do the work. As a guide for cost planning, we show you some general prices here:

Design Build your own canopy  Built by a tradesperson
Wooden portico From £70 From £250
Classic mono pitch portico made of aluminium or glass £70–150 £150–300
Simple canopy made of stainless steel or glass £150–300 £300–450
Rectangular canopy made of stainless steel or aluminium £300–450 £400–900

 

 

Please keep in mind that all prices mentioned above are only estimates. You can only make an exact calculation once you know the total size and features of the construction. Ideally, you should then check the current material costs at the hardware store.

Even more DIY ideas for around the house

Is your portico up and running? Perfect! Now you have plenty of time to devote to your next DIY project. How about building your own bin shed or installing a new wooden fence in the garden?