The color of slate is often determined by the amount and type of iron and organic material that are present in the rock.
How to identify slate roof.
Carbon black hematite red and purple chlorite and ferrous iron oxide green.
Slate roof installation quality fasteners used slate pattern the following may all be indications that the roof is failing from the condition of the slate nails.
Click to enlarge any image many loose slates sliding down and often pieces of slate on the ground around the building.
Here is a slate roof that is in poor condition probably beyond repair.
You may submit up to 3 photos.
4 pennsylvania black slate below from the lehigh northampton slate district tends to be the soft slate with a life expectancy of 75 125 years.
This is a generalization as some of these slates fail sooner some last longer.
Textural style roofs use rough textured slates with uneven butts and varied thickness.
Rules of thumb for determining that a slate roof is worn out and not economically repairable.
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.
Please provide a clear picture of the front back logo visible and any other angles you may want to include.
Soft deteriorated roofing slates may not be obvious from the ground but mean the roof is at end of life.
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.
The resulting roof has a very rustic look.
Slate roof central how to identify roof slate.
The best way to learn about rocks is to have specimens available for testing and examination.
If you cannot get a tile off of the roof please take close up photos of the roof in multiple angles so that we can identify your tile correctly.
Standard roofs are laid in uniformly spaced horizontal courses with alternating vertical joints carefully aligned.
Specific mineral components are responsible for the various colors.
Rock mineral kits.