Another way to reflect heat is to install a radiant barrier on the underside of your roof. A radiant barrier is simply a sheet of aluminum foil with a paper backing. When installed correctly, a radiant barrier can reduce heat gains through your ceiling by about 25%.he most effective method to cool your home is to keep the heat from building up in the first place. The primary source of heat buildup (i.e., gain) is sunlight absorbed by your house through the roof, walls, and windows.
The bases of a square prism are squares. A Prism with at least one pair of opposite faces that are squares is called square prism. This type of prism has six faces, and all the faces of the prism are rectangle in shape except bases. It can also be described as a right prism with square bases.
A rectangular prism is a 3-dimensional object with six rectangular faces. All its angles are right angles and opposite faces are equal. In a rectangular prism, the length, width and height may be of different lengths. A rectangular prism is also called a cuboid or rectangular solid. A cube is a special case of a cuboid in which all six faces are squares. The volume of the above rectangular prism would be the product of the length, width and height that is. Volume of rectangular prism = lwh. Surface area of rectangular prism = 2(lw + wh + lh) Worksheet to calculate the volume and surface area of a rectangular prism.