Walsh highlights that natural slates have a service life of greater than 100 years.
Life of a slate roof.
Some slates have been known to last over 200 years.
Slate a natural metamorphic stone with a fine grain appearance is perfect for being cut into uniform roofing tiles.
Natural slate roofs are well known to have a lifespan of hundreds of years with little to no maintenance.
There are slate roofs today still functioning that are multiple centuries old.
The average life of roofing.
Slate is sedimentary rock composed of compressed and hardened layers of clay or volcanic ash.
Asphalt and fiberglass shingles.
The roof over the main part of the house has been replaced with asphalt shingles.
The slate roof on the turret of this 19th century home has been preserved.
Natural slate is the most durable roofing material.
Installed properly slate roofs require relatively little maintenance and will last 60 to 125 years or longer depending on the type of slate employed roof configuration and the geographical location of the property.
Wood shingles and shakes.
Typical life for pennsylvania slate roofs is 40 50 years.
These life expectancies are general experience with the material and do not consider installation or environmental factors which vary from one building to the next.
Certainly the roofer has to make an accurate assessment of the roof condition and to replace enough loose damaged or questionable slates such that the remaining life of the roof is not only long but also such that additional frequent costly repairs are needed.
A properly repaired slate roof is a superb and durable roof.
Life expectancy of ribbon slates.
Roof shingles are available in asphalt compositions which are covered in crushed stone or fiberglass.
Siga 24 slate roof for fibre cement roof slates the life expectancy is a little shorter at around 50 60 years.
A lifespan of 80 100 years is typical for slate roofing although this can last longer if maintained well after installation.