The product shall consist of matured British conifer bark with an even nominal particle size distribution of 5-35mm with < 5 % dust and fines and less than 15% wood content.
The pH to be between 4.5 and 5.5.
The product shall be pest, disease and weed free and not have been treated with any additives.
The product shall be Forest Stewardship Council® (FSC®) certified*
The product shall have been tested in accordance with the requirements of BS 4790:1987, for fire resistance and be classified as having ‘low’ potential to burn
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