We work to the industry standard as agreed between the Builders Merchant Federation (BMF) and Trading Standards Business Compliance Unit. Under this agreement the sale of Bulk Bagged Aggregates should not be sold by weight but as a Bulk Bag. This Bulk Bag should be filled to contain a minimum of 800Kg allowing for a +/-5% difference. The weight of the product within the bag will also vary depending on the moisture content of the product (i.e. wet sand weight more than dry sand). The volume of the product within the bag will also vary depending on the weight of the aggregate within the bag.