Characteristics. Many traditional Scottish buildings have roofs covered with local slate. Scottish slate has a good reputation as a long-lasting material. … Slates were laid in diminishing courses, with the largest slates placed at the base of the roof, and smaller ones at the top.
What is scotch slate?
“Scotch” slates as quarried in Scotland were of random width (between about 4″ and 12″ wide but mostly 6″ to 8″ however they came “off the block”. In length they varied from 10″ to 16″. They varied in thickness too. They were single head nailed with every three or four courses being double or “cheek” nailed.
What is a nail sick roof?
Nail sickness is a term used primarily with iron nails which are used to fix roofing slates. As iron nails age, they corrode resulting in slate becoming dislodged, broken and loose.
What are roof skews?
Skews are the stone cappings to the gable walls against which the slate roof abuts. The joint is formed with a concealed lead flashing, or, more commonly a cement fillet as on a chimney.
What are Sarking boards?
Sarking boards are softwood boards, generally about 150 mm wide, that are attached to the rafters of a pitched roof to give extra strength to the overall structure of a building. … Firstly, sarking boards are typically used on buildings that are exposed to extreme weather conditions, such as high wind or torrential rain.
How many slates are in a square meter?
The amount of slates you need per square metre (m2) depends on which slate size you’re using. For example, if you’re using a 20×10 slate (500mmx250mm), you will require 21 slate per m2. A 24×12 slate (600mmx300mm) demands only 13 slate per m2.
How do nails detect illness?
Did you know your nails can reveal clues to your overall health? A touch of white here, a rosy tinge there, or some rippling or bumps may be a sign of disease in the body. Problems in the liver, lungs, and heart can show up in your nails.
What is nail fatigue?
What is Nail Fatigue? Many property owners report that as a roof ages the fixings which are often nails start to fail resulting in tile or slate slippage especially in windy weather conditions. This is a problem known as nail fatigue.
What is a chimney skew?
Skews divide one tenement roof from another and also act as a firebreak between tenements. They also protect the edge of the slates from being lifted by wind.
Is a slate roof worth it?
Benefits of a Slate Roof
Slate is valuable because of its longevity and aesthetic appeal. In fact, slate can last for more than a century and match with virtually any style of architecture. The longevity of slate is key to its value in the eyes of homeowners. After all, roofing can be expensive.
How many years does a slate roof last?
”Hard slate will last anywhere from 75 to 200 years, while soft slate will last only 50 to 125 years,” he said, adding that as a result, a homeowner trying to decide whether to repair, restore or replace a slate roof should first determine whether the existing slate is hard or soft.
How long does it take to slate a roof?
Slate can only be installed onto a pitched roof (at the minimal level recommended above) and depending on the complexity of the structure, can take anywhere from one week up to a few weeks or even longer.