standard terracotta tiles
around 15 lbs per square foot
I'm not certain what the dimensions of a 'standard terracotta' tile that you mention are but... we have a Spanish style roof, utilizing what is called Spanish Mission Tile, in which the tiles are semicircular in cross section and about 6 inches wide, by about 20 inches long. It is the type of tile that requires one column of tile INVERTED with the concave face upward, and the next column [on both sides] with the concave side down covering the edges of the adjacent up-curved tiles. The Mission tiles are NOT the kind in which one tile provides both the under' and over'' portion in a single tile. Our Mission tiles weigh 5 pounds each and we have 3,500 on our roof which totals out to roughly 17,500 pounds on a house of about 2,000 sqft. We [My father, Mother, myself (12 yoa), and my brother (8 yoa)] installed this roof ourselves back in 1954 and although it wasn't complicated, it was a whole lot of hard work. It took us almost an entire summer to do it. You may be able to get more info from the manufacturer from who we buy replacement tiles. It is the D'hannis [Sp?] tile company located at Hondo, Texas, which is west of San Antonio.
