Mortared ridges were also used, but, from the mid-nineteenth century, fired clay ridge tiles were mass-produced and widely available.
Defnyddiwyd cribau wedi'u plastro â morter hefyd, ond, o ganol y bedwaredd ganrif ar bymtheg, masgynhyrchwyd teils crib clai wedi'u tanio ac roeddent ar gael yn eang.