From low-profile composite platforms to multi-level cedar builds, we design and install decks that fit the way you actually use your backyard — and stand up to Canadian weather.
Diadem installed a back interlock patio with new stairs, side walkway, submerged a side downspout, fixed existing patio stones near the front created a nice ramp/walkway, installed sod and created a garden between the patio and fence. Our
Deciding on who to work with for a significant pool and landscaping project is never without its risks. Will the project be completed on time and on budget? Will it exceed expectations? Will the process be smooth, and most importantly, fun?
Tom and his team replaced our retaining wall, or what was left of it ( very old! ). From the start we felt comfortable with Tom and his vision of the final product. His team was hard working all day and clearly have a great working
Overview
We start with how you want to use the space — grilling, lounging, dining, hot tub — and design the deck around that. Materials are chosen for your budget, your maintenance tolerance, and the look you're after.
Every deck we build is engineered for proper drainage, ventilation, and frost movement, with concrete footings sized for the load. The result is a deck that still feels solid a decade in.
What's included
Trex, TimberTech, cedar and pressure-treated options.
Properly spaced joists, blocking, and hangers — not eyeballed.
Clean board surfaces with no exposed screw heads.
Modern railing systems that don't block the view.
Low-voltage stair and post lighting wired in clean.
We pull the building permit so you don't have to.
Our process
One crew, one point of contact, regular updates — no surprises.
We measure the space, check grade, and talk through how you'll use it.
Layout, materials, and a transparent fixed-price quote.
We pull permits and schedule around the weather.
One crew, clean site, final walk-through before sign-off.
Frequently asked
Composite costs more upfront but needs almost no maintenance. Cedar and pressure-treated look beautiful and cost less, but need staining or sealing every few years. We'll walk you through the trade-offs.
In most Ontario municipalities, decks over 24" off grade or attached to the house require a building permit. We handle the application and inspections.
Most residential decks take 1–2 weeks on site once we start, depending on size, height, and railing systems.
Where we work
Bring your design to life
Free, no-obligation site survey. Honest pricing. A plan you can stand behind.
