A board roof or boarded roof is a roofing method of using boards as the weather barrier on a roof. Board roofs can be applied in several ways, the basic types have the boards installed vertically and installed horizontally.
What is a boarded roof?
Typically a Scottish practice, the roofing underlay is laid directly over a series of sarking boards fixed to the roof rafters with the roof slates nailed directly to the sarking boards.
What is a close boarded roof?
This is where boards of a similar size to floorboards were placed next to each other to board the roof structure and were known as Close Boarding. Usually these boards were feather edged which means they are thicker at one end than the other, the thicker end being at the top.
What are the functions of a roof cover board?
Roof cover boards have a variety of uses within a roof system:
- Creating a suitable substrate for membrane installation.
- Adding durability to the system.
- Improving impact resistance.
- Limiting external fire spread.
- Adding to wind uplift resistance.
- Creating a thermal barrier.
- Creating a vapor barrier.
What is a Scottish roof?
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.
How do you insulate a close boarded roof?
Where there is a boarded roof, it is still possible to insulate if the roof can be raised by 50mm. By fitting 50mm counterbattens over the boarding, an insulating breather membrane can then be draped into the space created to achieve lower U values.
Why is SARK a roof?
Sarking is a pliable membrane that sits under your roof tiles, like a protective second skin. It helps insulation work more efficiently, and protects the things you value from storm driven rain and dust, condensation and bush fire ember attack.
What is a fully supported roof?
Fully Supported Traditional metal roofing and cladding generally describes the covering of a roof with metal sheeting such as aluminium, steel, copper and zinc roofing and cladding where the limitations to the metals structural strength mean it is unable to span distances unsupported and is therefor fully supported by …
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.
What are counter battens?
Counter battens are wooden strips that are installed vertically over pitched roofs to which horizontal tiling battens are attached. They are used to allow rainwater to pass off the tiles and away from your roof.
What are the different types of roof coverings?
Types of roof tiles
- Clay roof tiles.
- Concrete roof tiles.
- Natural slate roof tiles.
- Metal roof tiles.
- Lightweight roof tiles.
- Double style roman roof tiles.
What is brown board for roofing?
Polyiso. Consists of coated glass-fiber facers on both sides bonded to a core of isocyanurate foam. A roof insulation system that virtually eliminates ponding water.
What are the parts of a roof called?
Let’s begin describing the anatomy from the top of the roof.
- Shingles. The roof begins with the most recognizable of roof components: the shingles. …
- Flashing. …
- Underlayment. …
- Ice and Water Protector. …
- Roof Frame. …
- Parts of the Roof’s Edge.
What are skews on a roof?
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.
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.