Two factors influence how much DraughtEx you need to fill your floorboard gaps:
1. Total length of all your floorboard gaps added together
2. The width of your gap
The total length required is quickly worked out. Just multiply the length of one floorboard by the number of floorboards. However, please note that this length is not necessarily equal to the amount of DraughtEx you will actually need. As DraughtEx can be stretched to fit into thinner sections between floorboards when it is applied it can cover a larger area of floor than you would expect it to. So you might end with some surplus Draughtex. However, this should not cause you any problems, as we will take back any full Draughtex rolls you have bought from us.