For robust and weather-resistant outdoor surfaces, Decking 150 x 35 x 3.6 m Treated Timber delivers reliable performance where it matters most. Pressure-treated for enhanced protection against rot, fungal decay and insect attack, this decking board is built to stand up to damp, exposed conditions — making it an excellent choice for garden decks, patio platforms and walkways.
At 150 mm wide and 35 mm thick, this board combines strength with a smooth profile that’s comfortable underfoot and easy to work with. The 3.6 m length makes it ideal for medium-sized decking areas, reducing waste and jointing compared to shorter lengths, while still being easier to transport and handle on site.
Pressure treatment penetrates deep into the timber to help prolong service life with appropriate installation and maintenance, giving you dependable outdoor performance year-round. Whether you’re building a new deck, replacing worn boards or finishing a landscaping project, this treated decking timber offers durability, versatility and a classic timber look that can be stained or sealed to suit any design.
Key Features
Pressure-Treated Timber: Protection against rot, decay and insects for exterior durability.
Generous Profile: 150 mm wide x 35 mm thick for structural strength and good load performance.
3.6 m Length: Reduces joints and waste on medium-sized decking projects.
Flexible Finish: Can be stained, oiled or sealed to match design preferences.
Versatile Use: Ideal for decking, pathways, outdoor platforms and garden features.
Technical Specification
Product Type: Pressure Treated Decking Board
Nominal Dimensions: 150mm x 35mm
Length: 3.6 Metres
Finished Size: Approximately 4–8mm smaller after machining
Timber Type: Softwood
Treatment: Pressure Treated for external use
Use Class: Suitable for above ground exterior applications
Fixings Recommended: Exterior-grade, galvanised or stainless steel decking screws
Maintenance: Periodic sealing or oiling recommended to maintain appearance and longevity
Ideal Applications
Residential & commercial decking
Garden terraces and entertaining areas
Walkways and boardwalks
Raised outdoor platforms
TJ’s Tip
Leave even spacing between boards (typically 5–7 mm) to allow for natural moisture expansion and ventilation, and always use stainless or corrosion-resistant fixings to avoid staining and ensure long-lasting performance in all weather conditions.
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
Delivery Charges & Delivery Times
Delivery Type
Delivery Area
Delivery Charge
Delivery Time
Small Items
Republic of Ireland
€9.99
3–4 working days
Large & Heavy*
Standard delivery area
€29.99
5–7 working days
Extra Large*
Standard delivery area
€50.00
5–7 working days
Paint 5L or less**
Standard delivery area
€19.99
5–7 working days
Swipe sideways to compare delivery options.
Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products.
Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
