Question 1

Do retaining walls need drainage?

Accepted Answer

Yes, drainage is one of the most important parts of a retaining wall build. Without it, water builds up behind the wall and creates hydrostatic pressure that can push the wall forward or cause it to fail over time. We install drainage stone and relief paths behind every wall we build so water can escape and the structure stays stable through Ottawa's wet seasons and spring thaw.

Question 2

Do I need a permit for a retaining wall?

Accepted Answer

In Ottawa, walls over a certain height typically require a building permit, and the threshold varies depending on your municipality. Walls that are close to property lines or that retain significant grade changes may also need engineering. We'll assess your project and let you know exactly what's required so there are no surprises.

Question 3

How long do retaining walls last?

Accepted Answer

A well-built retaining wall with proper drainage and a solid base can easily last 25 years or more. The key factors are the quality of the base, how well the drainage works, and whether the wall was built to handle the actual load it's retaining. Cutting corners on any of those leads to early failure, which is why we don't skip steps.

Question 4

Can you build retaining walls on sloped backyards?

Accepted Answer

Yes, sloped backyards are actually the most common reason people need retaining walls. A well-placed wall can turn a steep, unusable slope into tiered flat areas for patios, gardens, or play space. We assess the grade and soil conditions to design a wall system that handles the load and works with your landscape plans.

Question 5

Can retaining walls be combined with steps or patios?

Accepted Answer

Absolutely, and that's one of the best ways to get value out of a retaining wall project. We regularly build walls that incorporate built-in staircases, transition into patio surfaces, or frame a walkway. Planning these elements together ensures everything ties in cleanly and the drainage, grading, and materials all work as one system.

Question 6

What type of blocks do you use?

Accepted Answer

We work with established retaining wall systems from manufacturers like Permacon and Techo-Bloc, selected based on your project's height, load requirements, and the look you want. For shorter garden walls, a standard block system works great. Taller walls that retain more soil may need a geogrid-reinforced system for added strength. We'll recommend the right product for your specific situation.

Retaining Walls in Ottawa

What is retaining walls?

Our process

Pricing factors

Gallery

Ready to get started on your retaining walls project?

FAQ

Other services

Related articles