How to make a roof on an extension to the house: types of suitable roofs and their arrangement

Selecting the appropriate roof for your addition is essential for both practicality and style. The roof blends in perfectly with your current structure in addition to shielding the new area from the weather. There are various kinds of roofs that are appropriate for additions, and each has unique benefits depending on your preferences and the climate where you live.

Because of their adaptability and contemporary appearance, flat roofs are a popular option for additions. They add more outdoor space and are easily converted to rooftop gardens or green roofs. To avoid water pooling and leaks, however, adequate waterproofing and drainage are necessary. These issues can be resolved with cutting-edge materials and skilled installation.

Another popular choice are gable roofs, which are distinguished by their triangle form. They improve ventilation and insulation by providing good water drainage and permitting attic space or vaulted ceilings. Additionally, gable roofs complement a wide range of architectural designs, giving your home addition a classic appearance.

Hip roofs, which have slopes on all four sides, are more stable and work well in regions that get a lot of snow or strong winds. In order to optimize natural light and ventilation, they can be paired with skylights or dormer windows to offer additional protection. Hip roofs are aesthetically pleasing and work well with both traditional and modern home styles.

It’s important to take your personal preferences, the architectural style of the building, and the local weather patterns into account when selecting the roof for your house addition. Whether you choose a hip, gable, flat, or another style of roof, making sure that your roof is installed and maintained properly will increase its lifespan and improve the overall usefulness and aesthetic appeal of your home addition.

"Selecting the appropriate roof for your addition is essential for both practicality and visual appeal. This article examines several roof styles that are appropriate for additions, ranging from more conventional options like hip and gable roofs to more contemporary options like shed and flat roofs. It helps homeowners make educated decisions based on their unique needs and architectural style by going over the important factors in their design and installation. To guarantee a smooth integration with your current home structure, it is crucial to comprehend various roof types and their arrangement techniques, regardless of your preferences for durability, affordability, or distinctive design."

Step 1. Thinking through the design

The extension, which borders the house from one side but is not a part of the capital walls, is formally referred to as a part of the building. Usually, the front door of the main building is connected to the extension through an internal message.

You can certainly construct a roof on an addition to your home by hand, but keep in mind that there are subtleties involved in the design of the extension’s roof.

For instance, it is easier to keep a building’s architecture harmonious in appearance the lower it is. However, you will need to make adjustments to the project if the building is tall, particularly if its roof is damaged or uneven.

In this instance, it is preferable to position the extension itself from the main side or the rear facade rather than the side. Try not to deviate from the home’s style while doing this as well.

We all have a little bit of a Russian spirit, of course, and sometimes I want to add carved cornices with elaborate roof decorations, but they will look ridiculous against the white walls of a contemporary home.

It is ideal if the veranda’s roof replicates the house’s roof in some way and uses the same roofing materials. It is preferable to use matching paint for every component! similar to this:

Step 2. Choosing a constructive angle and shape

When discussing the roof of the extension, a single shoe with a slope of between five and twenty-five degrees is the simplest design to construct. The quickest and easiest choice is this:

And observe the beauty that can result from such an extension if you approach the company with creative talent:

In actuality, a gable and trickered roof will prove to be far more intricate.

Step 3. Installation of the rafter system

Attend to this as well as the safety margin. The truth is that the weight of the snow can bend the rafters of the extensions, preventing the main roof of the house from being affected in addition to falling on the roof on a typical snowy day.

As a result, this margin of safety ought to be 1.5–2 times greater than it was when your roof was being built. Here’s an illustration of how one would build a gable roof for one of these extensions:

Additionally, the extension that encircles the house has a hollow roof that appears considerably more voluminous and organic:

An excellent holly roof is in independent performance, particularly for a home’s attached veranda:

Step 4. Selection of roofing material

For an extension, we suggest choosing the same roofing material as the main house. The building will then appear as a single composition.

However, it also doesn’t always work out to crank. For instance, the house’s roof is covered with unique material, and no factory uses the same shade.

And this is a common occurrence, particularly with ceramic tiles whose shades are invariably unique. Additionally, there are situations when it is preferable to select a different material in order to preserve the house’s aesthetic. Furthermore, there are plenty of options, many of which are highly successful.

Let’s take the most economical and not necessarily the most beautiful version of the extension’s roof: the fold. Even though she is entitled to exist:

Glass and transparent structures

It’s possible that the extension’s stunning glass roof. High light transmission and durability are two of the glass roof’s most important benefits.

The only issue we have is that this material is fairly heavy and requires a lot of work to install. You need sturdy supporting components that can evenly distribute the weight for such a roof.

Tempered glass that is one centimeter thick is frequently used for the extension’s transparent roof. This is particularly strong when dealing with inclement weather. Furthermore, because of its characteristics, a partial glazing of the roof is frequently done when only the light-passing inserts or a portion of the ceiling do.

We recommend that you leave the installation of the glass roof on your veranda or terraces to a professional because there is a risk involved. For instance, if the glass collapses due to the weight of the snow, everyone inside could be injured by glass fragments.

If you possess the requisite construction experience, however, carefully review the installation technology of this type of roof and attempt to err on the side of caution in all relevant areas.

Therefore, the strength of the structure supporting the glass is the most crucial factor. In this sense, a robust and reasonably simple aluminum is beneficial, and the tree is also processing-ready. The glass panel joints must be perfectly tight as the primary requirement.

It’s not necessary for the glass to be transparent at all; matte and patterned roofs look amazing.

However, if you prefer a transparent roof over a heavy glass one, then polycarbonate is a lot easier to work with.

Although working with it is not difficult, the material still has an amazing appearance:

By the way, if you handle the situation sensibly and with taste, the extension can be covered with regular slate:

Unusual roofs of the extension

It’s likely that you considered a range of options, including odd ones, when designing the roof for your house. Why not create carved bracelets in any well-known historical style or in the style of Russian spirituality?

Everything appears fantastic in the project’s photo and 3D renderings, but how many people are willing to take the chance of building their own home with an unconventional design?

Obviously not, as even though the roof is referred to as the fifth facade in terms of importance, the budget that is usually allocated for it is insufficient. As a result, you are forced to work with a "standard set" that consists of a sturdy rafter system and one of the roofing coatings that has the fewest possible problem spots on the roof.

However, the soul can already be taken from the roof of the extensions. The construction flaws are not as serious or obvious here, and if the same veranda is positioned at the back of the house or hidden by the shade of the trees, it won’t be able to negatively affect how the entire building looks.

This construction serves as an excellent illustration:

Initially, pine roof beams were fastened to brick pillars, and a rafter system was affixed above them. After that, a waterproofing film was used to seal the frame, and a sturdy crate and roof were constructed on top.

Step 5. The device of the junction

Making the proper adjustment of the roof to the house wall is now crucial. This is where leaks happen most frequently. Additionally, it is always a little mobile, regardless of the foundation on which there would not be an extension. The node should therefore be built for both stretching and compression.

You won’t be able to see all of these vibrations and tension in the rafter system, but over time they can damage the house and the roof as a whole.

As such, it’s critical to arrange the adjacent space so that it’s not only waterproof but also somewhat elastic. In this instance, roofing material up to a minimum of 30 cm in height will be required to protect the wall. A brief explanation is as follows:

The extension roof’s entire rafter design will be based on strapping, also known as racks-bags, which are fastened to the house’s wall at the upper end of the rafters using brackets or anchors.

Furthermore, the type of roofing material that is used will determine how complicated the junction is where the extension roof meets the house wall.

To attach a roof made of soft tile, adhere to these detailed instructions:

  • Step 1. If the wall is brick, then plastered it and coat it with a bitumen primer.
  • Step 2. In the estimated place of the joint, you need to fill the triangular rail (wooden from a beam of 50×50 mm is suitable), and draw an ordinary tile on it.
  • Step 3. Further on top of the tiles you need to mount the strips of a special carpet for yendova. Take the one that will be not 50 cm wide and glued with bitumen mastic on the back. Such, for example, is produced today by Technonikol. This strip needs to be started at least 30 cm on the wall, and if your region has a fairly hard climate, then even more.
  • Step 4. Next, close the upper part of the junction with a metal apron, which needs to be brought into the strobe and fixed.
  • Step 5. After that, seal the joint of the apron and the walls with thiocol, silicone or polyurethane sealant.

Ondulin’s roof is fastened to the house’s wall based on the following principle:

One technology states that both slate and ondulin are fastened to the home’s wall. The only distinction is that each reshet has a European Shifer attached to its wall.

Since ondulin is a soft substance, you should have a sizable supply of nails on hand. However, in order to arrange the adjustment of Ondulin, a unique self-adhesive tape is applied to the wall; as a result, creating a niche in the wall is not required, though it is still optional.

Let’s examine each step of this construction process in detail:

Ondulin is particularly helpful in practice because it maintains its neat appearance even on the intricate roof of the addition!

Types of Roofs Arrangement Details
Flat Roof Suitable for extensions; requires proper drainage and waterproofing.
Gabled Roof Offers attic space; matches main house for aesthetic harmony.
Hip Roof Provides stability in high winds; requires more complex framing.

A house extension’s roof is an important design decision that affects both practicality and appearance. Numerous roof types are available to meet your needs, depending on your preferences for style, climate, and budget. Gable roofs are perfect for areas with high rainfall because of their straightforward design and efficient water drainage. They are distinguished by their triangular shape. Because of its pitched architecture, there is attic space that can be used for storage or future growth.

A flat roof gives an attractive, contemporary appearance for people who want to optimize their interior space. Flat roofs are economical and practical, allowing you to add solar panels or rooftop gardens to your home extension while also being environmentally friendly. To avoid water pooling, though, adequate drainage and upkeep are necessary, particularly in regions that frequently experience strong storms or snowfall.

A hip roof can be the best option if you like the traditional aesthetics mixed with functionality. A hip roof provides stability against strong winds and snow loads because all four sides slope gently downward. This design is adaptable, going well with a variety of architectural motifs and offering decent attic ventilation. Increased durability and aesthetic appeal more than make up for its marginally higher construction costs.

The ideal roof for your house addition ultimately comes down to striking a balance between your architectural goals, your financial constraints, and the climate where you live. Choosing between the traditional gable roof, the modern flat roof, or the adaptable hip roof will improve your home extension’s aesthetic appeal as well as its practicality.

Video on the topic

Extension roof from scratch

The roof of the extension

✅ Frame extension to the house. Gable roof. Part 3

What do you think, which element is the most important for a reliable and durable roof?
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Alexandra Fedorova

Journalist, author of articles on construction and repair. I will help you understand the complex issues related to the choice and installation of the roof.

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