A Veritable Almanac!
The table below helps to determine the dimensions of a project versus the number of whole boards needed using 120mm shiplap cladding. This way the dimensions of the project are determined by the cladding used rather than just choosing arbitrary dimensions.
When making a construction where the dimensions are chosen arbitrarily look at the table below and choose the nearest height which is deemed suitable e.g. 6 x 120mm boards will give me a dimension of 665mm without needing to cut one of the boards to size, simple…!