Wattle and daub is a composite building method used for making walls and buildings, in which a woven lattice of wooden strips called "wattle" is "daubed" with a sticky material usually made of some combination of wet soil, clay, sand, animal dung and straw. Wattle and daub has been used for at least 6,000 years and is still an important construction method in many parts of the world. Many historic buildings include wattle and daub construction.
The wattle and daub technique has been used since the Neolithic period. It was common for houses of Linear pottery and Rössen cultures of middle Europe, but is also found in Western Asia (Çatalhöyük, Shillourokambos) as well as in North America (Mississippian culture) and South America (Brazil). In Africa it is common in the architecture of traditional houses such as those of the Ashanti people. Its usage dates back at least 6,000 years. There are suggestions that construction techniques such as lath and plaster and even cob may have evolved from wattle and daub. Fragments from prehistoric wattle and daub buildings have been found in Africa, Europe, Mesoamerica and North America. [1]
Evidence for wattle and daub (or "wattle and reed") fire pits, storage bins, and buildings shows up in Egyptian archaeological sites such as Merimda and El Omari, dating back to the 5th millennium BCE, predating the use of mud brick and continuing to be the preferred building material until about the start of the First Dynasty. It continued to flourish well into the New Kingdom and beyond. [2] Vitruvius refers to it as being employed in Rome. [3] A review of English architecture especially reveals that the sophistication of this craft is dependent on the various styles of timber frame housing. [4]
The wattle and plaster process has been replaced in modern architecture by brick and mortar or by lath and plaster, a common building material for wall and ceiling surfaces, in which a series of nailed wooden strips are covered with plaster smoothed into a flat surface. In many regions this building method has itself been overtaken by drywall construction using plasterboard sheets.
The wattle is made by weaving thin branches (either whole, or more usually split) or slats between upright stakes. The wattle may be made as loose panels, slotted between timber framing to make infill panels, or made in place to form the whole of a wall. In different regions, the material of wattle can be different. For example, at the Mitchell Site on the northern outskirts of the city of Mitchell, South Dakota, willow has been found as the wattle material of the walls of the house. [5] Reeds and vines can also be used as wattle material. [6] [7] The origin of the term wattle describing a group of acacias in Australia, is derived from the common use of acacias as wattle in early Australian European settlements. [8]
Daub is usually created from a mixture of ingredients from three categories: binders, aggregates and reinforcement. Binders hold the mix together and can include clay, lime, chalk dust and limestone dust. Aggregates give the mix its bulk and dimensional stability through materials such as mud, sand, crushed chalk and crushed stone. Reinforcement is provided by straw, hair, hay or other fibrous materials, and helps to hold the mix together as well as to control shrinkage and provide flexibility. [9] The daub may be mixed by hand, or by treading – either by humans or livestock. It is then applied to the wattle and allowed to dry, and often then whitewashed to increase its resistance to rain. Sometimes there can be more than one layer of daub. At the Mitchell Site, the anterior of the house had double layers of burned daub. [10]
There were two popular choices for wattle and daub infill paneling: close-studded paneling and square paneling.
Close-studding panels create a much narrower space between the timbers: anywhere from 7 to 16 inches (18 to 40 cm). For this style of panel, weaving is too difficult, so the wattles run horizontally and are known as ledgers. The ledgers are sprung into each upright timber (stud) through a system of augered holes on one side and short chiseled grooves along the other. The holes (along with holes of square paneling) are drilled at a slight angle towards the outer face of each stud. This allows room for upright hazels to be tied to ledgers from the inside of the building. The horizontal ledgers are placed every two to three feet (0.6 to 0.9 metres) with whole hazel rods positioned upright top to bottom and lashed to the ledgers. These hazel rods are generally tied a finger-width apart with 6–8 rods each with a 16-inch (40 cm) width. Gaps allow key formation for drying. [11]
Square panels are large, wide panels typical of some later timber-frame houses. These panels may be square in shape, or sometimes triangular to accommodate arched or decorative bracing. This style requires the wattles to be woven for better support of the daub.
To insert wattles in a square panel several steps are required. First, a series of evenly spaced holes are drilled along the middle of the inner face of each upper timber. Next, a continuous groove is cut along the middle of each inner face of the lower timber in each panel. Vertical slender timbers, known as staves, are then inserted and these hold the whole panel within the timber frame. The staves are positioned into the holes and then sprung into the grooves. They must be placed with sufficient gaps to weave the flexible horizontal wattles.
In some places or cultures, the technique of wattle and daub was used with different materials and thus has different names.
In the early days of the colonisation of South Australia, in areas where substantial timber was unavailable, pioneers' cottages and other small buildings were frequently constructed with light vertical timbers, which may have been "native pine" ( Callitris or Casuarina spp.), driven into the ground, the gaps being stopped with pug (kneaded clay and grass mixture). Another term for this construction is palisade and pug. [12]
"Mud and stud" is a similar process to wattle and daub, with a simple frame consisting only of upright studs joined by cross rails at the tops and bottoms. Thin staves of ash were attached, then daubed with a mixture of mud, straw, hair and dung. The style of building was once common in Lincolnshire. [13]
Pierrotage is the infilling material used in French Vernacular architecture of the Southern United States to infill between half-timbering with diagonal braces, which is similar to daub. It is usually made of lime mortar clay mixed with small stones. It is also called bousillage or bouzillage, especially in French Vernacular architecture of Louisiana of the early 1700s. The materials of bousillage are Spanish moss or clay and grass. Bousillage also refers to the type of brick molded with the same materials and used as infilling between posts. Columbage refers to the timber-framed construction with diagonal bracing of the framework. Pierratage or bousillage is the material filled into the structural timbers. [14]
Bajarreque is a wall constructed with the technique of wattle and daub. The wattle here is made of bagasse, and the daub is the mix of clay and straw. [15]
Jacal can refer to a type of crude house whose wall is built with wattle and daub in southwestern US. Closely spaced upright sticks or poles driven into the ground with small branches (wattle) interwoven between them make the structural frame of the wall. Mud or an adobe clay (daub) is covered outside. To provide additional weather protection, the wall is usually plastered. [16]
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Adobe is a building material made from earth and organic materials. Adobe is Spanish for mudbrick. In some English-speaking regions of Spanish heritage, such as the Southwestern United States, the term is used to refer to any kind of earthen construction, or various architectural styles like Pueblo Revival or Territorial Revival. Most adobe buildings are similar in appearance to cob and rammed earth buildings. Adobe is among the earliest building materials, and is used throughout the world.
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. The term stucco refers to plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces.
Building material is material used for construction. Many naturally occurring substances, such as clay, rocks, sand, wood, and even twigs and leaves, have been used to construct buildings and other structures, like bridges. Apart from naturally occurring materials, many man-made products are in use, some more and some less synthetic. The manufacturing of building materials is an established industry in many countries and the use of these materials is typically segmented into specific specialty trades, such as carpentry, insulation, plumbing, and roofing work. They provide the make-up of habitats and structures including homes.
Timber framing and "post-and-beam" construction are traditional methods of building with heavy timbers, creating structures using squared-off and carefully fitted and joined timbers with joints secured by large wooden pegs. If the structural frame of load-bearing timber is left exposed on the exterior of the building it may be referred to as half-timbered, and in many cases the infill between timbers will be used for decorative effect. The country most known for this kind of architecture is Germany, where timber-framed houses are spread all over the country.
Lath and plaster is a building process used to finish mainly interior dividing walls and ceilings. It consists of narrow strips of wood (laths) which are nailed horizontally across the wall studs or ceiling joists and then coated in plaster. The technique derives from an earlier, more primitive process called wattle and daub.
Natural building or ecological building is a discipline within the more comprehensive scope of green building, sustainable architecture as well as sustainable and ecological design that promotes the construction of buildings using sustainable processes and locally available natural materials.
Brick nog is a construction technique in which bricks are used to fill the gaps in a wooden frame. Such walls may then be covered with tile, weatherboards, or rendering, or the brick may remain exposed on the interior or exterior of the building.
A lath or slat is a thin, narrow strip of straight-grained wood used under roof shingles or tiles, on lath and plaster walls and ceilings to hold plaster, and in lattice and trellis work.
An earth structure is a building or other structure made largely from soil. Since soil is a widely available material, it has been used in construction since prehistory. It may be combined with other materials, compressed and/or baked to add strength.
Wall studs are framing components in timber or steel-framed walls, that run between the top and bottom plates. It is a fundamental element in frame building. The majority non-masonry buildings rely on wall studs, with wood being the most common and least-expensive material used for studs. Studs are positioned perpendicular to the wall they’re forming to give strength and create space for wires, pipes and insulation. Studs are sandwiched between two horizontal boards called top and bottom plates. These boards are nailed or screwed to the top and bottom ends of the studs, forming the complete wall frame. Studs are usually spaced 16 in. or 24 in. apart.
Quincha is a traditional construction system that uses, fundamentally, wood and cane or giant reed forming an earthquake-proof framework that is covered in mud and plaster.
The method of building wooden buildings with a traditional timber frame with horizontal plank or log infill has many names, the most common of which are piece sur piece, corner post construction, post-and-plank, Ständerbohlenbau (German) and skiftesverk (Swedish). This traditional building method is believed to be the predecessor to half-timber construction widely known by its German name fachwerkbau which has wall infill of wattle and daub, brick, or stone. This carpentry was used from parts of Scandinavia to Switzerland to western Russia. Though relatively rare now, two types are found in a number of regions in North America, more common are the walls with planks or timbers which slide in a groove in the posts and less common is a type where horizontal logs are tenoned into individual mortises in the posts. This method is not the same as the plank-frame buildings in North America with vertical plank walls.
The vernacular architecture of the Carpathians draws on environmental and cultural sources to create unique designs.
Light clay is a natural building material used to infill between a wooden frame in a timber framed building using a combination of clay and straw, woodchips or some other lighter material.
Bousillage is a mixture of clay and grass or other fibrous substances used as the infill (chinking) between the timbers of a half-timbered building. This material was commonly used by 18th-century French colonial settlers in the historical New France region of the United States and is similar to the material cob and adobe. In French torchis has the same meaning or the meaning of a loaf of this material.
A slab hut is a kind of dwelling or shed made from slabs of split or sawn timber. It was a common form of construction used by settlers in Australia and New Zealand during their nations' colonial periods.
Wattle is made by weaving flexible branches around upright stakes to form a woven lattice. The wattle may be made into an individual panel, commonly called a hurdle, or it may be formed into a continuous fence. Wattles also form the basic structure for wattle and daub wall construction, where wattling is daubed with a plaster-like substance to make a weather-resistant wall.
American historic carpentry is the historic methods with which wooden buildings were built in what is now the United States since European settlement. A number of methods were used to form the wooden walls and the types of structural carpentry are often defined by the wall, floor, and roof construction such as log, timber framed, balloon framed, or stacked plank. Some types of historic houses are called plank houses but plank house has several meanings which are discussed below. Roofs were almost always framed with wood, sometimes with timber roof trusses. Stone and brick buildings also have some wood framing for floors, interior walls and roofs.
Mountain View Homestead and General Store is a heritage-listed homestead and general store at Wisemans Creek, Oberon Shire, New South Wales, Australia. It was designed by David Smith Todd, who built the homestead from 1880 to 1894. It was added to the New South Wales State Heritage Register on 10 March 2006.
Bamboo-mud wall is a composite wall construction method largely used in Taiwan under Japanese rule in the early 20th century. Derived from Japanese wattle and daub, Bamboo-mud wall differs from Japanese processor in its materiality, using bamboo instead of wood for woven lattice.
