5 Things to Know About Dormers

By Editorial Team

Updated on November 3, 2025

Dormers, which were first introduced in the early Gothic period, continue to attract homeowners searching for a certain elegance and refinement when it comes to the roof of their houses. In due part because of its timeless style, the dormer window perfectly adorns the exterior of any home. 

Get Your Project Started Today

Submit your details and receive three free quotes from trusted contractors.

A dormer is essentially a vertical glass opening positioned on the slope of the roof. It is a particularly aesthetic element that ensures the penetration of light and the ventilation of your attic.

Dormer windows are extremely common in heritage buildings, and much more prominent in contemporary architecture. As a matter of fact, many people are tempted to turn their attic space into a habitable space due to the various possibilities offered by dormer windows. Nowadays, dormers can be rather large and have a particularly modern look. Check out these undeniably charming sources of light!

5 Things to Know About Dormers

dormer_5 Things to Know About Dormers_Reno Quotes

Photo: Deposit Photo

1. The dormer window's style depends on how the attic is used

There are numerous styles of dormers: ox-eye dormer, shed dormer, flared gable dormer, and hipped dormer. The styles are truly infinite. The choice ultimately depends on the shape of your home and the purpose of your attic space.

For example, the shed dormer is distinguishable by its steep incline that follows the slope of the roof. As a result, the window possibilities are quite limited. Although it can be used for ventilation purposes, natural lighting will be limited. For this reason, the attic can be further used if converted into a storage space or a space that does not require much light. 

However, if you want to turn your attic into a bedroom, then it would be better to opt for a hipped dormer. This type of dormer is covered by a flat roof, which allows the installation of a large window. The natural light will be optimized, as well as the ventilation of the room.

2. Dormers enhance the durability of your roof

Did you know that attics are the prime location for mould and fungus growth of all kinds? Since they tend to be dark, damp, cold, and often poorly ventilated, attics deteriorate easily, especially if poorly maintained.

Even if you are not converting your attic into a living space, having a dormer window put in is a great way to maximize the ventilation of your attic and provide additional natural lighting during the warmer seasons.

Note that mould and mildew issues will dissipate over time. However, keep in mind that roof insulation must be particularly effective to help effectively counteract humidity problems.

velux window_dormer_5 Things to Know About Dormers_Reno Quotes

Photo: Deposit Photo

3. Avoid confusing dormers and skylights 

It is not uncommon to see roofs featuring windows better known as VELUX. What you may not have known is that VELUX is also a brand that has been pioneering this field for close to 60 years. As a matter of fact, the name comes from the words ventilation and light: VE for ventilation and LUX for light. The main distinction to be made between a dormer and a VELUX window is in the positioning of the window itself. The dormer window is positioned vertically, while the VELUX is fixed into the roof.

A skylight will obviously be more exposed to all weather, and for this reason, it is usually double-glazed and has great sealing. On the other hand, the VELUX does not allow for space-saving like a dormer window. Moreover, the latter is usually installed by a professional roofer, as it represents an extensive amount of renovation, which is not the case for roof windows.

4. Dormers transformed into rooftop terraces

Modern homes tend to take on classic geometric shapes, giving them a trendy look. However, this does not prevent the installation of dormers, which, given their design possibilities, blend seamlessly with contemporary homes.

Today, dormer windows are made up of a deck and a bay window to fully benefit from the sunshine and the resulting comfort. Even if the dormers first appeared decades ago, it is a timeless element that has evolved over time!

Planning on transforming your roof into a terrace? Check out the article What to Know When Building a Rooftop Terrace in Canada.

dormer_5 Things to Know About Dormers_Reno Quotes

Photo: Deposit Photo

 

5. Dormers allow for quite a space gain

Turning your attic into a living space can be a great way to expand your home. It is also without a doubt the best way to ensure its durability. In fact, neglected spaces tend to fall into disrepair, mainly because of the lack of heat.

Therefore, chances are, should your roof be directly sheltering a leaving space instead of a neglected or unused room, preservation will be enhanced. With your needs in tow, an architect will then be able to design your new dormer. This type of installation is ideal for any space gain in height and to further maximize the natural lighting of the room.

Once the plans have been drawn up, getting the appropriate municipal building permits will be a must, as most exterior home remodelling requires a renovation permit. After that, hire a professional roofer to finally make your roofing project a reality.


Get 3 free quotes for your project!

Submit a project and get 3 free quotes!

Looking for something else?

Table of contents

5 min read

Get 3 free quotes for your project!

Submit a project and get 3 free quotes!

Are you a contractor?

Join our network and receive real leads!

Download the price guide for renovations

We’ll be emailing you the latest market price guide for renovations.



Related articles

The latest industry news, interviews, technologies, and resources.

3 min read

Editorial Team

07 Nov 2023

Spotting and Repairing Damaged Front Steps

Leaving your house at the start of a long day and returning home at the end of one is a rite of passage. The steps that lead up to your front door deal with the weight of yourself and your loved ones going through these motions, in and out, over and over. So of course, it’s not surprising that the front steps of your home can begin to wear down over time. If you’re dealing with a cracked or broken step or beginning to notice signs of wear and tear, then you’ll need some tips on how to deal with this as soon as possible.

6 min read

Cynthia Pigeon

07 Nov 2023

Renovation Project: How to Proceed in Case of Setbacks

If there is one thing every homeowner dreads before starting a renovation project, it has to be the possibility of encountering unforeseen issues, especially the possibility of exceeding the set budget for the project. So, here is a tidbit of advice on how to deal with such a situation should the hired contractor carry out additional work or should you discover a hidden defect.

Exterior renovations
5 min read

Editorial Team

26 Aug 2025

How has the Construction Industry Been Affected by the Labour Shortage?

It’s not much of a secret that the construction industry is facing a labour shortage, as many companies report a lack of labour although faced with growing demands. With the industry itself booming in sectors such as residential housing, commercial properties, and public work projects, the workforce necessary to take on these projects isn’t readily available. So, what effect will the labour shortage have?

Information and news on the construction sector
9 min read

Editorial Team

07 Nov 2023

Eco-Friendly Tips for Your Not-So-Newly-Built Home

With the growing concerns as to the state of our planet, green renovation and construction projects continue to soar, becoming increasingly sought-after and trendy. Naturally, some people live in homes that were built 30 years ago, in which numerous aspects, systems, and appliances aren’t up to par with the current energy-efficiency standards. 

Green renovation
6 min read

Editorial Team

03 May 2024

Window & Door Soundproofing Techniques for Commercial Spaces

Running a commercial space takes a lot of work. For those managing a restaurant, bar, storefront, office, community organization or another venue with plenty of moving parts, it can be challenging to keep everything in smooth operation. Take the issue of noise as an example, between the constant hum and buzz of street traffic, the sounds of nature or humans in competition with the many noises coming from inside your venue, you might be overwhelmed. Luckily, there are plenty of ways to soundproof doors and windows of a commercial space to control the sound moving inwards.  


Looking for a contractor?

Submit a project and get 3 free quotes now!