Pressure-treated decks

Pressure-Treated Deck Builders in Toronto and the GTA

The most affordable way to add a solid, good-looking deck. Built on frost-ready footings with hardware rated for treated lumber, so it holds up for years.

Side view of a raised two-level pressure-treated deck with skirting in Markham
Pressure-treated deck, Markham
Why pressure-treated

A strong deck for a smaller budget

Pressure-treated lumber is softwood treated to resist rot and insects. It costs less than cedar or composite, is easy to repair, and takes stain in almost any colour.

  • Lowest upfront cost of any deck material
  • Strong framing lumber for raised and multi-level decks
  • Easy to replace a single board years from now
  • Can be stained to match your house or fence
Lower and upper deck levels joined by wide wood stairs in Markham
Two-level deck, Markham
Built right

The details that make treated decks last

Rated hardware

Treated lumber is hard on plain steel. Joist hangers, screws and bolts are rated for contact with treated wood.

Footings below frost

Posts sit on footings set deep enough to resist frost heave, so the deck stays level year after year.

Board spacing

Boards are gapped so water drains and the wood can move as it dries without cupping.

Cut-end treatment

Fresh cuts expose untreated wood. Cut ends get an end-cut preservative before they go in.

Upkeep

What it takes to keep it looking good

  • Sweep off leaves and debris so boards can dry
  • Wash the deck each spring
  • Seal or stain every 2 to 3 years, more often in full sun
  • Check for loose screws and railing posts each season
Deck framing with roof posts and beams going up in Vaughan
Deck framing, Vaughan
See a real project

Two-level pressure-treated deck, about 700 sq ft, Markham

About 700 sq ft of pressure-treated deck over two levels: a raised upper deck off the house stepping down to a large lower deck, with wide stairs, wood picket railings, skirting and access doors below.

View the project

Two-level pressure-treated deck with wood railings on a Markham home, seen from the yard
Markham

Pressure-treated deck questions

How long does a pressure-treated deck last?
A well-built pressure-treated deck can give many years of service. How long it lasts depends mostly on the framing, drainage around the posts and how often the boards are cleaned and sealed.
When can I stain a new pressure-treated deck?
New treated lumber is often still wet from the treatment. It usually needs time to dry before stain will soak in. Follow the stain maker's directions, and try a few drops of water on the boards: if they soak in, the wood is ready.
Can I switch to composite boards later?
Only if the frame was built for it. Composite usually needs closer joist spacing than wood. If you think you may upgrade later, tell us and we can frame for composite now.
Is pressure-treated wood strong enough for a raised deck?
Yes. Pressure-treated lumber is the standard framing material for decks of all heights, including decks with cedar or composite boards on top.

Want a pressure-treated deck?

Send photos of the space and rough measurements. We'll price it in treated wood and show you the composite difference if you'd like.

Call Get a free quote