Roof shingle
Roof shingles are almost always highly visible and so are an important aspect of a building's aesthetics in patterns, textures and colors.
All shingle roofs are installed from the bottom upward beginning with a starter course and the edge seams offset to avoid leaks.
Many shingle installations benefit from being placed on top of an underlayment material such as asphalt felt paper to prevent leaks even from wind driven rain and snow and ice dams in cold climates.
No shingles are water-tight so the minimum recommended roof pitch is 4:12 without additional underlayment materials.
During rain, more water is channeled along eaves and complex rooflines, and these are subsequently more prone to erosion than other areas.
Once the nail heads are exposed, water running down the roof can seep into the building around the nail shank, resulting in rotting of underlying roof building materials and causing moisture damage to ceilings and paint inside.
Modern pressure-impregnated fire retardant treated wood shakes and shingles can achieve a Class B fire rating, and can achieve a Class A rating when used in conjunction with specially designed roof assemblies.
Nearly all the houses and buildings in colonial Chiloé were built with wood, and roof shingles were extensively employed in Chilota architecture.
Commonly the small and stressed area above the nail hole may fail, allowing the slate to slip as before.
This usually follows rot developing and weakening the internal timbers, often as a result of poor ventilation within the roof space.
The removal of shingles containing asbestos requires extra precautions and special disposal methods.
They are crafted from durable heavy-gauge aluminum and designed to emulate the classic appearance of traditional slate, cedar shingles, and other materials.
[9] Cedar shingles are resistant to rot and commonly available in lengths of 18 and 24 inches (460 and 610 mm).
Some examples of manufacturers of synthetic or composite roof shingles are DaVinci Roofscapes or Unified Steel.
They are more quiet than most roofs, hail resistant, and a high wind rating if there is a tongue and groove fitting at the front edge of the rubber shingle design.
