Roofing materials

Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to its high elastic modulus, yield strength, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world. Steel is used in structures (as concrete reinforcing rods or steel beams), in bridges, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons.

thumb|A single concrete block, as used for construction

chromium-containing steel alloy resistant to corrosion

Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert. The commonly known brand name of PTFE-based composition is Teflon by Chemours, a spin-off from DuPont, which originally invented the compound in 1938.

Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression.

A thermoplastic, or thermosoftening plastic, is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.

roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.

Seagrasses are the only flowering plants which grow in marine environments. There are about 60 species of fully marine seagrasses which belong to four families (Posidoniaceae, Zosteraceae, Hydrocharitaceae and Cymodoceaceae), all in the order Alismatales (in the clade of monocotyledons). Seagrasses evolved from terrestrial plants which recolonised the ocean 70 to 100 million years ago.

thumb|300px|Row of trullo houses on Monte Pertica street in Alberobello, [[Bari Province, Apulia, southern Italy]] A trullo (plural, trulli) is a traditional Apulian dry stone hut with a conical roof. Their style of construction is specific to the Itria Valley, in the Murge area of the Italian region of Apulia. Trulli were generally constructed as temporary field shelters and storehouses or as permanent dwellings by small proprietors or agricultural labourers. In the town of Alberobello, in the province of Bari, whole districts contain dense concentrations of trulli. The golden age of trulli w

thumb|right|A thatched public house|pub (The Williams Arms) at [[Wrafton, North Devon, England]] Thatching is the craft of building a roof with dry vegetation such as straw, water reed, sedge (Cladium mariscus), rushes, heather, or palm branches, layering the vegetation so as to shed water away from the inner roof. Since the bulk of the vegetation stays dry and is densely packed—trapping air—thatching also functions as insulation. It is a very old roofing method and has been used in both tropical and temperate climates. Thatch is still employed by builders in developing countries, usually with

thin, tapered pieces of wood primarily used to cover roofs and walls of buildings to protect them from the weather

roll roofing and waterproofing material

type of metal building material

type of synthetic rubber

style of roof tiling using arched tiles in both layers

thumbnail|upright=1.35|A single floor or simple set of joists. If the joists land directly above the Wall stud|studs they are stacked. A joist is a horizontal structural member used in framing to span an open space, often between beams that subsequently transfer loads to vertical members. When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support.

material

outer material of a roof

overlapping plates for covering a roof

thumb|right|A on the Dingle Peninsula, Kerry, Ireland thumb|A reconstruction of a square-shaped beehive hut at the Irish National Heritage Park, County Wexford A ' (plural ) or beehive hut' is a dry-stone hut with a corbelled roof, commonly associated with the south-western Irish seaboard. The precise construction date of most of these structures is unknown with the buildings belonging to a long-established Celtic tradition, though there is at present no direct evidence to date the surviving examples before . Some associated with religious sites may be pre-Romanesque, some consider that the mo

type of shingle

A sod roof, or turf roof, is a traditional Scandinavian type of green roof covered with sod on top of several layers of birch bark on gently sloping wooden roof boards.

photovoltaic panel in the form of a roof shingle or tile

overlapping roof tiles used in ancient Greek and Roman architecture as a waterproof and durable roof covering

Diagram of two T-beams|alt=|thumb|458x458px A T-beam (or tee beam), used in construction, is a load-bearing structure of reinforced concrete, wood or metal, with a capital 'T'-shaped cross section. The top of the T-shaped cross section serves as a flange or compression member in resisting compressive stresses. The web (vertical section) of the beam below the compression flange serves to resist shear stress. When used for highway bridges the beam incorporates reinforcing bars in the bottom of the beam to resist the tensile stresses which occur during bending.

building made from a circle of stones topped with a domed roof

heavy-duty paper used in construction

type of roof

Article about roofing tiles manufactured in Mangalore region