Proportions For Different Slate Roofing

Its weight and expense makes slate an uncommon roofing choice.

Proportions for different slate roofing.

The roof might be straight sided convex or concave and broken by dormers. And that gives you more freedom to make the footprint something other than perfect 4 3 proportions. Typically 1 4 3 8 thick natural slate roof weight about 1050 1200 lbs per square or 51 58 kg m 2. Determination of fe s proportions of iron sulphides in several roofing slates.

Generally speaking a good slate should have between 10 and 50 quartz 15 60 chlorite and 20 70 mica. Natural slate is one of the most expensive roofing materials to purchase. Textural style roofs use rough textured slates with uneven butts and varied thickness. For example inch slates may be laid on the top quarter inch slates on the second quarter inch slates on the third quarter and the bottom quarter covered with 1 inch thick slates.

Clay tile is heavy weight roofing material and each square of tile roof weigh 900 1100 pounds 408 499 kilograms. Second a simple hip roof like the one in this example often has a flat rubber or metal roofing section at the top instead of a hip so there s no ridge at all and the height is whatever you want it to be. For slate s s the most typical variety of roofing slate the average mineral proportions determined by different authors can be found at table 1. Roofs were clad too in wood shingles or even metal.

Many homes are not built to support that much weight and will require structural reinforcement plus certification by a structural engineer before roofing. Standard slate roofs use slates 3 16 to 1 4 thick of one uniform length and width with square tails laid to a line in a conventional shingling pattern. Standard roofs are laid in uniformly spaced horizontal courses with alternating vertical joints carefully aligned. Standard uniform slate roofs standard slate roof systems are comprised of 1 4 3 8 slate of one standard length and width and with square cut butts.

For architectural reasons some slate roofs are graduated. In such a graduated roof random widths are used throughout but thickness and length change. These houses often had slate roofs which might be ornamented with multi color slates arranged in patterns. Depending on the geological conditions and the ratio of iron fe and sulfur s these iron sulfides may end up being different minerals with different potentials for oxidation.

Decorative iron roof cresting goes hand in hand with the style. Slate is one of the heaviest kinds of roofing with a weight of over 1000 pounds per square 100 square feet. Minimum slate headlap moderate weather this table of slate overlaps and roof angles shows common sizes of roofing slate and the recommended slope for the corresponding slate size.