Treated Pine Stringers
Premade Treated Pine Stringers for Decks and Outdoor Stairs
Building outdoor stairs for a deck, gazebo, or free-standing flight? A premade treated pine stringer takes the hardest part of stair-building off your plate. The stringer is the board the treads sit on, running diagonally on edge from ground to upper level, giving the stairs their support and rigidity. We stock them ready-made from 1 step (330mm) up to 9 steps (1650mm), plus a sawtooth centre support for wider flights, all in treated pine that stands up to the weather, insects, and rot for years outdoors.
Why Buy a Premade Stringer
Cutting stringers from scratch is where stair jobs go wrong, one bad angle and the whole flight is off. A premade stringer gives you accurate, consistent step spacing straight away, saving time and removing the costly mistakes that come with marking and cutting your own. They suit residential and commercial jobs, install on decks, gazebos, and free-standing stairs, and can be stained or painted to match the rest of the build.
Pick the stringer by the number of steps your rise needs, and add a sawtooth centre support for wider stairs where the treads need bracing in the middle.
What You’ll Need With It
Treads are not included and are bought separately, so you can match them to your deck. For fixing, use galvanised or stainless steel screws and connectors rated for outdoor use so the fixings last as long as the H3 timber. Pair the stairs with treated pine decking and the rest of the external treated pine range for the deck they connect to. Want it all in one go? We can put together a stair kit with stringers, centre support, screws, and materials, just ask.
Serving Sydney Tradies and Renovators
- Trade pricing and bulk quantities: Competitive rates on volume orders. Call 1300 554 775 for trade and project pricing.
- Delivered to site across Sydney: Sydney, the Blue Mountains, Wollongong, and the Central Coast.
- Premade 1 to 9 steps: Accurate, ready-to-install stringers that save cutting from scratch.
- Australian-owned family business: Western Sydney based. Real people, real stock, real advice.
Whatever the staircase calls for, we’ve got the stringer.
Call 1300 554 775 or request a quote online and our team will help you match stringers, treads, and a centre support to your stairs.
Frequently Asked Questions
What is a stair stringer?
The stringer is the board the stair treads attach to. It runs diagonally on edge from the ground to the upper level and gives the staircase its support and rigidity.
Are treads included with the stringers?
No. Treads are bought separately so you can match them to your deck or project. We can put together a full stair kit with stringers, treads, centre support, and fixings on request.
What size stringer do I need?
Choose the stringer by the number of steps your stair rise needs, from 1 step (330mm) up to 9 steps (1650mm). Call 1300 554 775 if you need help working out the step count.
When do I need a centre support?
Wider staircases need a sawtooth centre support to brace the treads in the middle and stop them flexing. It sits between the outer stringers.
Can treated pine stringers be painted or stained?
Yes. They can be stained or painted to match your deck or stairs, and the H3 treatment protects them against weather, insects, and rot outdoors.