140x19 Pre Oiled Merbau Decking Select Grade KD Random Lengths

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140x19mm Merbau Pre Oiled is a heavy-duty, highly durable hardwood decking option primarily used for premium outdoor projects. Most Australian retailers price this specific size

Key Product Specifications

• Durability: Merbau (also known as Kwila) is a Class 1 durability timber, making it resistant to termites and decay even in harsh outdoor conditions.
• Fire Rating: This timber is BAL 29 certified, meaning it is suitable for use in many bushfire-prone areas.
• Grade: Most 140x25mm stock is "Select Grade," which is the highest industry grade and approximately 98% free of natural blemishes.
• Tannin Bleeding: Experts warn that Merbau contains high amounts of natural tannins that can bleed and stain adjacent surfaces like light-coloured tiles or pool surrounds after rain. 
• Set Lengths vs. Random Lengths: While random lengths are the standard budget-friendly option, "Set Length" boards (specific lengths like 5.4m) are significantly more expensive

To calculate the total linear metres (LM) for 140x19mm Merbau decking, use the following industry-standard calculation:

The Calculation Formula

For 140mm boards, you typically allow for a 5mm gap between boards for drainage and expansion. This gives you an effective coverage of 145mm (0.145m) per board width.

• Coverage: 1 / 0.145 = 6.90 LM per square metre

• • Waste Factor: Always add 10% for cutting waste and "end-trimming" (standard for random length packs).