A Budget-Conscious Option That Still Looks Good
New home landscaping budgets in St. Thomas subdivisions get stretched between sod, fencing, patios and a retaining wall, all at once. Timber is generally the lowest-cost wall material of the options we install, which makes it a common choice for a first-phase backyard project.
It works particularly well for the two to four foot grade changes typical between St. Thomas rear lot lines, without the excavation and forming costs that come with taller concrete walls.
Wood Options
- Pressure-treated lumber, CA-B rated, most economical option
- Hardwood timber such as oak or black locust for a premium look and longer service life
How We Build a Timber Wall
Post depth
Posts set to the required depth for the wall height, below frost where needed.
Deadman anchors
Horizontal timbers tied back into compacted soil to resist outward pressure.
Drainage
Gravel backfill and drainage stone directly behind the timber wall.
Backfill
Soil compacted in lifts to prevent settlement behind the finished wall.
Timeline and Cost
A typical residential timber wall in St. Thomas takes one to three days depending on length and height. Timber is usually the lowest-cost wall option, though exact pricing depends on wood grade and site access.
Comparing Timber to Other First-Phase Options
Some St. Thomas homeowners ask whether a cheaper option than timber exists. Generally not among code-compliant, professionally installed systems, since DIY approaches typically skip the drainage and anchoring that make a wall last.
timber vs block retaining walls covers the cost and lifespan tradeoff in more detail if you're deciding between the two.
Choosing Between CA-B Lumber Grades
Not all pressure-treated lumber is rated the same. CA-B or better ground-contact rated lumber is what we use for retaining walls, since lower grades aren't intended for structural ground contact use.
Questions we get asked
Is timber a good long-term option or just a cheap fix?
It's a genuine long-term option when built with proper drainage and deadman anchors, not just a budget shortcut. Expect 20 to 40 years of service.
Can a timber wall handle St. Thomas's soil conditions?
Yes, with adequate drainage behind the wall. Standing water is what shortens a timber wall's life, not the soil type itself.
What's the cheapest retaining wall option for a St. Thomas backyard?
Timber is generally the most economical of the materials we install, particularly for walls under about four feet.
Do you offer both pressure-treated and hardwood options?
Yes. Pressure-treated lumber is the most common choice; hardwood like oak or black locust costs more but lasts longer.
Is there a cheaper option than a professionally installed timber wall?
Not among code-compliant systems. DIY timber walls that skip drainage and deadman anchors tend to fail early, costing more in the long run.
Is all pressure-treated lumber suitable for a retaining wall?
No, we specifically use CA-B or better ground-contact rated lumber, since lower grades aren't rated for structural retaining wall use.
What happens to a timber wall's appearance as it weathers over the years?
Pressure-treated wood naturally greys as it weathers if left unstained, which some homeowners prefer for a rustic look. If you want to maintain the original tone, staining every few years keeps the colour more consistent.
