Bare cedar shingles and pre-primed shingle designs are applied with roughly 1/16" of space between them, which can be adjusted slightly during installation in order to make the design fit better. Over time as the shingles weather they will develop spaces of varying size and may match the existing shingles.

Cedar shingles will swell, cup, and curl both before and after installation depending on the amount of humidity in the air. This is normal and to be expected.