Half-round metal roof gutters don't sag because they are made from sturdy materials. Half-round gutters are made from ...

Galvanized steel, on-the-other-hand ... My house was built circa 1880 and still has its original terne metal roof, which consists of individual metal shingles with an embossed decorative pattern.

And, we have learned that because the half-round gutters are shallower and are wider at the top than the more angular modern ...