Basement Renovation Guide: Starting Point

By Cynthia Pigeon

Updated on November 8, 2023

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.

5 min read

Cynthia Pigeon

06 Aug 2026

Three-Season vs. Four-Season Sunroom: Which Should You Choose?

Expanding a single-family home to bring more natural light into its living spaces is a dream for many Canadian homeowners. With our bright summers and long winters, maximizing sunlight can provide an invaluable sense of well-being. However, when it is time to move forward with an addition, one fundamental question arises: should you choose a three-season sunroom or invest in a four-season sunroom?

Insulation
5 min read

Collaboration

09 Jul 2026

Why Modern Homes Still Flood in Canada: The Gap Between Design and Drainage Reality

When people think of modern homes in Canada, they often imagine better construction, improved materials, and fewer maintenance headaches. Newer homes are built with updated codes, stronger materials, and more advanced plumbing systems. So it can feel surprising when flooding, especially in basements still happens.

8 min read

Amanda Harvey

27 May 2026

How to Secure More Renovation Contracts

For a renovation contractor, summer can be a tricky period. Many homeowners are away, decision-makers take vacations, and some projects slow down before picking back up in the fall. That makes it important to secure fall renovation projects before the summer break begins.

Workers and candidates in the construction sector
7 min read

Editorial Team

27 Jan 2026

Finding HVAC Clients in Quebec City in 2026

In a competitive market like construction and renovation in Quebec City, HVAC contractors need to stand out to land profitable projects. Whether you specialize in heating, ventilation, or air conditioning, this article presents concrete strategies to attract new clients and grow your business in 2026, while providing reliable and locally recognized service.

4 min read

Editorial Team

24 Sep 2024

How to Tell When it's Time to Renovate Your Electrical Panel

Having problems with your electricity? It's time to take a look at your electrical panel. RenoQuotes.com is here to help you figure out if those flickering lights indicate a deeper problem that you should act on quickly.