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Wood bark

I have been asked to quote as part of a large landscaping projet to supply and lay wood bark. The total area will be approx 1120 m2 and they require the depth to be 75mm deep. The area will be planted with 4000 2-3 ltr shrubs prior to this. I have tried the online calculators but are they that accurate?? Can anyone give me an idea of quantity I would need please. Many thanks in advance.

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Replies

  • the dimentions work out to 84m3 plus you will need a little extra say 4 m3 to make shore  you have enough 

    • Hi David thanks for this. Could you share your formula you have used for this please?

       

  • 1120m2 x .075m =84 

    • Thats what I use for gravel etc but bark is usually a lot lighter so not sure if this would be as accurate. Not saying you are wrong but personaly bit sceptical when working out bark as can never get it right!?

       

  • PRO

    The answer in the Spons book to the next question is 0.04 hours per m2.

    Andy :-)

  • that is volume not weight  it will settel a bit but in time it will rott away using the nitrogen in the soil

  • PRO

    Get it dropped loose, make sure you know spec of mulch - there are 6 or so major types and some you'll need to baulk up order by ~20%

    Just a little practical advice, the 3"/75mm is a BS that most Landscape Architects / Developers use and they'll spec Melcourt. Price that up, show it to the client then scrape them up off the floor ! A cheaper alternate is often used.

    It 'rarely' gets implemented at that depth due to the cost in my experience. Also you'll struggle planting many shrubs in 3" of mulch, you'll swamp them and you can't plant high to compensate

    If it is a new build etc, speak to site manager/ground workers to ensure they leave you sufficient room to lay, otherwise you are presented with the task of excavating soil especially kerb/paving-side as they typically grade to finished level.

    • What good advice Gary, which is why 'face to face' dialogue is essential right from the start of the process.

       

      • Following on, we quoted a few years ago for "xxxx sq m Ornamental Bark Mulch at 75mm depth to all beds" only to find that the successful contractor used Wood Chip at a fraction of the cost. 

         

  • PRO

    Andrew, 

    We have just completed a restoration of a wooden framed zip wire and this involved spreading bark over a 180sqm area. To give you an idea we spread 20 tonnes or bulk bags over the area with some deeper levels where the footfall is greater. We eventually finished with an average depth of 10cm over all, with the exception of much greater depth where needed, personally i would have put another 8 tonnes in but it might give you an idea for your project 

     

     

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