What's the difference between butt seam vs. overlap seam when it comes to wall graphics?
The difference between the two seam types is how graphics are paneled next to each other. For wall graphics, generally, an overlap seam is recommended to compensate for any potential shrinkage that may occur over the service life.
Butt seam and overlap seam are the two most common types of seams when it comes to paneling adhesive vinyl graphics. Each have their own advantages and reasons for use.
Here is a general diagram to visual the difference between the two seam:
Butt Seam
For wall graphics best practice is overlap seam because vinyl will shrink Here is a reference diagram from the sewing industry. Vinyl will shrink over time so it is best practice to do an overlap seam of 0.5-1 inch depending on the type of vinyl. Cast vinyl shrinks less than Calendered over time so Calendered film will need more ove
Overlap Seam
As the name implies, an overlap seam involves overlapping the paneled graphics at the edges. This type of seam has the advantage of giving extra coverage at the seams of graphics to accommodate for any potential shrinkage that may occur. This is especially crucial for calendered films which tend to have a higher shrinkage in comparison to cast films.