A method of tapestry weaving where wefts of two different colours are woven onto the same warp threads. This method allows for block colour weaving as it does not leave a slit or gap between other colour blocks in a tapestry. There are two kinds of such weaving — comb dovetailing, where the single wefts alternate over the warp, and sawtooth dovetailing, which involves weaving clusters of the weft simultaneously.