Beyardslate asked:
Slate Roof Tile Installation Options
Properly installed slate roofing can provide decades of service, superior fire resistance and exceptional beauty and elegance.
When providing roofing materials, roof contractors often refer to “squares” when talking about the size of a roof installation. When dealing with slate roof tiles it is important to understand while many roofing products can only be installed in one specific manner and hence a “square” requires a predefined quantity of roofing material, that is not the case with slate roof tile. The number of tiles or square feet needed of roof slate for any given installation will vary depending on the method and overlap of each course of slate roof tile used by the installer. This decision as to which installation method will be used is determined by many factors such as weight limitations of the supporting structure, cost of materials and installation, building codes, climate, desired useful life and other factors.
Slate has been used for centuries as a roofing material to provide decades of reliable service. It is not uncommon for a slate roof to last in excess of 100 years! There are basically two methods typically used to install slate roof tile, traditional and hybrid.
At the turn of the century, slate roof tile was installed in a manner where it was the waterproof barrier. Using this method and a 16 x 10-inch (about 400*200mm) slate roof tile a minimum of 221 tiles per square was required. This translates into a dead weight load in excess of approximately 1200 pounds per “square” for just the roof tile. To support this load the building structure must account for such a heavy material by increasing the strength of the roofing truss system, bearing walls of the building and building foundation. Traditional slate installation methods require planning and expense far beyond the cost of the slate roof itself. Because of the large number of slate roof tiles per square that must be installed installation labor can get quite expensive. Installation will typically exceed the costs of the material itself. When using this method it is common to install over wood lathe as opposed to solid plywood sub-roofing. This allows the slate to “breath” avoiding moisture traps and possible mold accumulation under the waterproof barrier of the roofing slate. The lathe is then typically covered by 30# felt paper followed by the slate itself. Copper or stainless steel nails or screws should always be used and traditionally flashing at peaks and valleys are made of copper in this type of installation.
Green roofing
Slate Roof Tile Installation Options
Properly installed slate roofing can provide decades of service, superior fire resistance and exceptional beauty and elegance.
When providing roofing materials, roof contractors often refer to “squares” when talking about the size of a roof installation. When dealing with slate roof tiles it is important to understand while many roofing products can only be installed in one specific manner and hence a “square” requires a predefined quantity of roofing material, that is not the case with slate roof tile. The number of tiles or square feet needed of roof slate for any given installation will vary depending on the method and overlap of each course of slate roof tile used by the installer. This decision as to which installation method will be used is determined by many factors such as weight limitations of the supporting structure, cost of materials and installation, building codes, climate, desired useful life and other factors.
Slate has been used for centuries as a roofing material to provide decades of reliable service. It is not uncommon for a slate roof to last in excess of 100 years! There are basically two methods typically used to install slate roof tile, traditional and hybrid.
At the turn of the century, slate roof tile was installed in a manner where it was the waterproof barrier. Using this method and a 16 x 10-inch (about 400*200mm) slate roof tile a minimum of 221 tiles per square was required. This translates into a dead weight load in excess of approximately 1200 pounds per “square” for just the roof tile. To support this load the building structure must account for such a heavy material by increasing the strength of the roofing truss system, bearing walls of the building and building foundation. Traditional slate installation methods require planning and expense far beyond the cost of the slate roof itself. Because of the large number of slate roof tiles per square that must be installed installation labor can get quite expensive. Installation will typically exceed the costs of the material itself. When using this method it is common to install over wood lathe as opposed to solid plywood sub-roofing. This allows the slate to “breath” avoiding moisture traps and possible mold accumulation under the waterproof barrier of the roofing slate. The lathe is then typically covered by 30# felt paper followed by the slate itself. Copper or stainless steel nails or screws should always be used and traditionally flashing at peaks and valleys are made of copper in this type of installation.
Green roofing
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