External wall - An outer wall of a building not being a party wall even though adjoining to a wall of another building and also means a wall abutting on an interior open space of any building.
Eaves - The lower edge of the inclined roof surface of a pitched roof is termed as eaves.
Echoes - When a reflecting surface is so far away from the source that the sound is reflected back as a distinct repetition of the direct sound , the reflected sound is called an echo.
Efflorescence - If soluble salts are present in bricks or the mortar , they absorb moisture from atmosphere and go into solution which appears on the surface in the form of whitish substance as the moisture dries out and the salts crystallise.
Extrados - It is the outer surface of an arch or the outer curve of the arch ring. Enamel paint - It is made by adding pigments like white lead or zinc white to a vehicle which is a varnish.
English bond - This bond consists of alternate course of headers and strechers. In this arrangement , vertical joints in the header courses come over each other and the vertical joints in the strecher course are also in the same line.
Expansion joints - These joints are provided to accomodate the expansion of adjacent building parts and to relieve compressive stress that may otherwise develop.
Foundation - It is the lowest part of the structure below the ground level which is in direct contact with the ground and transmits all the dead , live and other loads to the soil on which the structure rests.
Floors - Floors are flat supporting elements of a building. They divide building into different levels thereby creating more accomodation on a given plot of land.
Footing - A foundation unit constructed in brick work , masonry or concrete under the base of a wall or column for the purpose of distributing the load over a large area.
Fan light - The function of fan light is to ensure cross ventilation in the room even when the door is closed. It also assists in providing natural light in the corridirs or passages.