For architectural reasons some slate roofs are graduated.
Proportions for different slate roofing.
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.
Natural slate is one of the most expensive roofing materials to purchase.
These houses often had slate roofs which might be ornamented with multi color slates arranged in patterns.
The roof might be straight sided convex or concave and broken by dormers.
Slate is one of the heaviest kinds of roofing with a weight of over 1000 pounds per square 100 square feet.
Textural style roofs use rough textured slates with uneven butts and varied thickness.
Typically 1 4 3 8 thick natural slate roof weight about 1050 1200 lbs per square or 51 58 kg m 2.
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.
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.
Standard roofs are laid in uniformly spaced horizontal courses with alternating vertical joints carefully aligned.
Roofs were clad too in wood shingles or even metal.
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.
In other cases it is the genius of the design professional roofing contractor or building owner that deserves the credit for creating a spectacular roofscape.
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.
In such a graduated roof random widths are used throughout but thickness and length change.
Determination of fe s proportions of iron sulphides in several roofing slates.
Decorative iron roof cresting goes hand in hand with the style.
Its weight and expense makes slate an uncommon roofing choice.
Clay tile is heavy weight roofing material and each square of tile roof weigh 900 1100 pounds 408 499 kilograms.
Many homes are not built to support that much weight and will require structural reinforcement plus certification by a structural engineer before roofing.
Generally speaking a good slate should have between 10 and 50 quartz 15 60 chlorite and 20 70 mica.
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.
Variations occur in color thickness surface texture graduated sizes and varying widths.
