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en.wikipedia.org/wiki/Cavity_wall

The outer wall is the brick wall that faces the outside of the building structure.[1] [full citation needed] The inner wall, separated from the outer wall by a continuous air space or the cavity, is the wall on the interior of the building structure.

civilseek.com/cavity-wall-construction

Cavity Wall Construction. The use of cavity walls is common in cold countries. However, one should know how they are constructed, and why. The normal 275 mm (11 inches) cavity wall which is suitable for buildings not exceeding two stories in height, consists of two half brick (4 – 1/2 inch walls with 2 inches cavity).

theconstructor.org/structural-engg/cavity-walls...

Construction of Cavity Walls. In general, cavity wall doesn’t require any footings under it, just a strong concrete base is provided on which cavity wall is constructed centrally. Two leaves are constructed like normal masonry, but minimum cavity must be provided in between them.

www.houseselfbuild.com/cavity-wall-construction

Preparation for the cavity wall construction. Most of the materials and tools used in the cavity wall construction can be ordered and on-site with 1-2 days but some time will need to be allocated to order longer lead in materials such as insulation, lintels, sills and scaffolding.

www.designingbuildings.co.uk/wiki/Cavity_wall

A cavity wall is a wall formed by an inner skin and an outer skin of masonry (sometimes referred to as ‘leaves’ or ‘wythes’ if they are a single unit wide), ... The inclusion of a cavity in the construction of an external wall prevents moisture transmitting from the outer skin to the inner skin.

www.planningportal.co.uk/info/200130/common_projects/32/...

Cavity wall construction was introduced into mainstream UK housebuilding in the 1930s and most modern houses are now built with cavity walls. Since the concept has been around for approaching 100 years, the materials used to build such walls have developed hugely.

www.dailycivil.com/cavity-wall-construction-purpose-and-precautions

Cavity walls are found to cost about 20% less than the construction of same thickness solid wall. Construction Details: As already stated, the cavity walls have two leaves- inner and outer with hollow space in between them.

www.constructiontuts.com/cavity-wall-advantages-disadvantages

Advantages of Cavity Wall – What are Disadvantages of Cavity Wall Construction. by constructiontuts February 9, 2017, 11:15 am. Cavity wall consists of double walls with a hollow space between them. A wall constructed two leaves or skins with a space or cavity between them is called a cavity wall. It is commonly constructed as an external wall.

www.britannica.com/technology/cavity-wall

Cavity wall, in architecture, a double wall consisting of two wythes (vertical layers) of masonry separated by an air space and joined together by metal ties. Cavity walls have a heat-flow rate that is 50 percent that of a solid wall.

masonryadvisorycouncil.org/.../uploads/2016/05/cavitywalls.pdf

ty walls. HISTORY Cavity walls are not new, they have been observed in ancient Greek and Roman structures. At the Greco Roman town of Pergamum, on the hills overlooking the Turkish town of Bergama, a stone wall of cavity type construction still exists. Sometime in the early part of the 19th century, the cav-ity wall was probably reinvented by ...