Basement Renovation Guide

By Léa Plourde-Archer

Updated on April 17, 2024

Being able to enjoy a cozy basement free of cold floors is probably something you have been dreaming of. If not, should you happen to have an unfinished basement, the possibility of converting this area into a livable space is probably at the forefront of your mind.

In any case, properly carrying out the first steps of your basement renovation will ensure the durability of the work that will be undertaken, which is why it is always a good idea to be well-informed beforehand! Here are 5 key points to consider when renovating your basement.

Basement Renovations: 5 Key Points

1) Waterproofing the foundations

First things first, make sure that there is no water ingress that could lead to mould growth. Therefore, it is highly recommended to perform a waterproofing inspection to ensure that the foundations are properly sealed. Thus, ensuring that your French drain is properly functioning is essential to prevent any basement water infiltration. Should it be faulty, have it repaired before starting any renovation work. Also, click here to learn more about installing a French drain.

Any cracks will also need to be carefully repaired to prevent any water seepage in the basement. Note that a vertical crack less than 3.2 millimetres wide can be fixed by homeowners using hydraulic cement, which is a product that is available in most hardware stores. However, a horizontal crack or a crack larger than 3.2 millimetres requires the assistance of a contractor to be properly repaired.

basement renovations_basement renovation guide: starting point

2) Basement wall insulation

While both fibreglass and rock fibre insulation were commonly used quite some years ago, these are no longer recommended. Instead, opt for extruded polystyrene insulation panels or spray-applied polyurethane foam, both of which are mould resistant.

Note that ceiling insulation can be left by the wayside, after all, numerous devices within the ceiling act as a barrier against heat loss. Therefore, prioritize wall and floor insulation. A well-insulated floor requires a subfloor, regardless of the flooring material selected

Remember to insulate your hot and cold water pipes. And, speaking of which, note that insulating the water heater considerably increases its energy efficiency (by about 20%). Also, insulating cold water pipes should not be overlooked as it prevents condensation from damaging the structural materials located near the pipes.

Are you planning on renovating your basement in the near future? Check out our article Checklist of the Steps to Follow: Basement Renovation Project

basement family-friendly space_basement renovation guide: starting point

Are you planning on renovating your basement?

Fill out our form to receive quotes from certified contractors!

3) Radon gas

As defined by the Government of Canada, radon is “a radioactive gas that comes from the breakdown of uranium in soil and rock. It is invisible, odourless and tasteless.” Given that your renovation project has yet to be underway and that any air infiltration points in contact with the ground have not yet been sealed, radon may have insidiously entered your basement.

To ensure that the radon gas levels do not exceed 200 becquerels per square foot (maximum acceptable level), Health Canada recommends purchasing a DIY radon test kit or seeking professional help in testing radon levels.

For more information, check out our article about radon and the appropriate measures to rectify elevated radon gas levels in your basement. 

basement staircase_basement renovation guide: starting point

4) Check valve maintenance

The check valve is a round trap located in the basement, and it is designed to prevent municipal sewers from backflowing into your home's drainage system. This device should be cleaned on a regular basis, but especially before starting any work, as it could be damaged in the event of a liquid/gas backup. Thus, it is essential to clean the flap gate and thoroughly check the gasket for leaks.

5) Ceiling height

For a basement to be considered livable space, ceilings must be at least 6 feet high. Note that some municipalities may require ceilings to be 6.8 feet to issue a building permit.

Also, note that a forced-air ventilation system is highly recommended for basement use. This ventilation method releases clean, preheated air into the basement, thus limiting the need for space heating. 

For more information about the subject matter, check out our article: Standard Basement Ceiling Height

Are you looking for more information in regard to your basement? Check out these articles: 

Get 3 renovation quotes for your basement renovation project

RenoQuotes.com can help you get quotes for your basement renovation project. By submitting your project, we’ll put you in contact with top-rated contractors. Fill in the form on the homepage (it only takes a few minutes), and you will get estimates from trusted professionals.

Dial 1-844 828-1588 to speak with one of our customer service representatives.


Get 3 free quotes for your project!

Submit a project and get 3 free quotes!

Looking for something else?

Table of contents

4 min read

Find contractors near you

Enter your postal code



Related articles

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

4 min read

Léa Plourde-Archer

08 Nov 2023

Concrete Crack Repair: Epoxy or Polyurethane?

Concrete is known for being a solid, durable material that can be maintained over time. It is the most used material for solid foundations and for major projects such as bridges and viaducts. Over time, it has proven itself as an essential building material.

Interior renovations
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.  

8 min read

Editorial Team

25 Apr 2024

Home Interior Design Trends to Avoid this Year

In terms of stylish décors and interior design, trends come and go, year after year. Some are timeless, like wood for example. Whereas, other decorative aspects or faux pas can quickly make a room look outdated, and go as far as lowering the resale value of your home. 

6 min read

Editorial Team

03 May 2024

How to Obtain an RBQ Licence

Are you taking the leap and becoming a contractor? If so, there's no real need for us to mention that obtaining a valid licence issued by the Régie du bâtiment du Québec is a mandatory step to achieving said goal.

6 min read

Editorial Team

06 Jul 2025

Home Extension and Addition—How to Plan Your Project

You’re running out of space, but why leave that ideal setting where your kids grew up? Since moving out is off the table, building onto your family home seems inevitable. If you happen to find yourself in this situation, you’ve definitely come to the right place! Our article details everything you need to know about building a home extension or addition.