Fiberglass stucco lath has become the professional choice over metal lath for a couple of reasons. First, unlike metal, fiberglass does not rust. Metal lath is susceptible to moisture because the way it is attached. Metal is also very sharp and hard to cut and install. Fiberglass stucco lath has no sharp edges, thus making it much easier to install. The fiberglass lath is also less expensive. Additional advantages are that the furring strips are made of foam rubber, which gives a tight seal to nails or staples, which also alleviates the problem of moisture.