A non-porous material is one that cannot absorb liquid or gas. Glass, metals and hard plastics are examples of non-porous materials.Know More
Porous materials have holes or pores which makes it easy for gas or liquids to pass through them. A sponge is an excellent example of a porous material. Semi-porous materials allow certain liquids or gas through, usually by diffusion. An example of semi-porous materials are those used to purify water. Human skin is is also a semi-porous material.
A non-porous material lets nothing through. It is generally too hard for things to pass through and doesn't have holes to allow substances in or out.Learn more about Building Materials
The formula to calculate the weight of asphalt material in a given area is equal to the volume of the material multiplied by the density of the material. Generally, the volume is measured in cubic feet, and is calculated by multiplying the surface area by the thickness of the asphalt.Full Answer >
A footing for a poured concrete retaining wall is constructed by digging out a flat area on the ground, adding concrete forms to contain the material, placing rebar at appropriate places and finally mixing concrete before pouring into the form. A concrete footing is poured on either side of the bottom of a retaining wall to give stability to the structure.Full Answer >
To calculate the R-value in insulation, determine the R-value of the specific insulating material. For multilayer installations, determine the R-values of each layer, and add the values together to get the total R-value of the system. The higher the R-value, the greater its insulating properties.Full Answer >
To use the J-B Weld epoxy system, select the appropriate J-B Weld formulation for the material it is to be used on, clean the material, mix the epoxy compound, apply it and let it dry. J-B Weld offers many types of adhesive solutions, but the original formulation is a two-part epoxy.Full Answer >