Treated Pine Logs, Ag Pipe & Drainage & Geofabrics

Treated Pine Logs, Ag Pipe, Drainage & Geofabrics — Buying Guide

Whether you’re building a garden retaining wall, improving site drainage, or stabilising a slope, the right combination of treated pine logs, agricultural pipe, and geofabric will ensure a durable, effective result. This category covers the core landscaping and civil products we supply for drainage and earthwork applications across South East Queensland.

Treated Pine Logs

Treated pine logs (also known as sleepers or landscaping rounds) are a versatile and attractive material for garden retaining walls, edging, garden bed borders, and decorative landscaping features. Pressure-treated to H4 or H5 standard for in-ground use, treated pine logs resist rot and decay for years, making them a practical and cost-effective alternative to hardwood in garden settings. Commonly used across residential and commercial landscaping projects on the Sunshine Coast and Brisbane.

• Round logs: Natural round profile — ideal for rustic garden retaining walls, edging, and log steps
• Half rounds: Flat face with natural round back — often used for garden bed edging and low retaining applications
• Sleepers: Rectangular sawn profile — suitable for formal retaining walls, raised garden beds, and horizontal feature walls

Agricultural Pipe (Ag Pipe)

Agricultural pipe (commonly called ag pipe, slotted pipe, or sub-surface drainage pipe) is a flexible, perforated corrugated pipe used for sub-surface drainage in lawns, garden beds, sports fields, and building sites. Ag pipe allows water to enter through the perforations and is directed away from the area to a suitable discharge point, preventing waterlogging and improving soil drainage.

• Slotted ag pipe: Perforations along one side — installed with slots facing down to collect groundwater effectively
• Fully perforated ag pipe: Perforations on all sides — used in applications requiring maximum water collection from all directions
• Sock-covered ag pipe: Ag pipe wrapped in a geotextile filter sock — prevents fine particles clogging the perforations, extending the life of the drainage system

Geofabrics and Geotextiles

Geofabric (also called geotextile or landscape fabric) is a permeable woven or non-woven synthetic fabric used in landscaping and civil engineering to separate, filter, reinforce, and protect soil layers. Geofabric is used beneath ag pipe in drainage installations to prevent soil contamination of the drainage aggregate, under driveways and paths to prevent sub-base mixing, on slopes for erosion control, and in garden beds to suppress weed growth while allowing water and air movement.

Common Applications

• Sub-surface drainage: Ag pipe in a gravel trench wrapped in geofabric — the most effective method for resolving soggy lawn and garden drainage problems
• Garden retaining walls: Treated pine logs as structural retaining elements for garden beds and terraced landscaping
• Slope stabilisation: Geofabric combined with coir logs and matting to prevent erosion on embankments and cut-and-fill slopes
• Driveway and path sub-base separation: Geofabric layer between native soil and road base aggregate to prevent migration and maintain pavement integrity
• Raised garden beds: Treated pine edging with geofabric lining to retain soil and prevent weed incursion

Frequently Asked Questions

How deep should ag pipe be installed?
For residential lawn drainage, ag pipe is typically installed at 300–450mm depth in a gravel-filled trench. For sub-floor drainage or larger civil applications, greater depth may be required. Always install the pipe with a fall (minimum 1:100 gradient) toward the discharge point.

What treatment rating do I need for treated pine logs used in garden walls?
H4 treated pine is the standard for above-ground and in-ground garden applications in standard soil conditions. H5 is recommended for high-moisture or highly acidic soils, or for any application in direct contact with the ground in tropical or subtropical environments.

Do you deliver drainage products to Brisbane and the Sunshine Coast?
Yes — we offer Australia-wide delivery including to Brisbane, the Sunshine Coast, and all of South East Queensland. Heavy items like treated pine logs are delivered by pallet freight; contact us for a quote.

Order Landscaping & Drainage Supplies Online — Sunshine Coast, Brisbane & Australia-Wide

Discount Landscape Supplies is your one-stop shop for treated pine logs, ag pipe, geofabric, and drainage supplies for residential and commercial landscaping projects across South East Queensland. Order online with fast dispatch or contact our team for bulk pricing and freight quotes on larger orders.