Why shingles are now made with fiberglass as opposed to organic papers?
In previous years organic papers were used as a base for shingles because it was inexpensive, used paper and it has a short life expectancy by the manufacturers. The top layer gets dried out and crakes appear by the sun exposing the paper base. The use of fiberglass as a base being impervious to water is unaffected by water and does not curl like paper. Fibreglass tends to last longer.
