You will need to measure your room at the widest point taking into account any bay windows and door entrances as below. Once you have these measurements you need to add 10% to allow for wastage.
To work out how many packs you will need find your chosen product which will show how many square metres a pack will cover, you will then need to divide your room size (in square metres) by the quantity of square metres per pack and this will give you how many packs you need. If you have taken your measurements in a different unit then we have listed a helpful conversion table below.