Testing can be done either by inducing heat energy into an object, which is active, or by using the natural infrared energy of an object, which is passive. Testing is used to test insulation materials and installations, with variations of 0.01 degrees Fahrenheit able to be detected, as well as variations within the material being examined.
Infrared thermography
The use of an infrared camera to detect moisture in roof insulation.
Infrasonic
A frequency of sound below the range audible to humans.
Infrastructure
The basic public works in a city including roads, parks, bridges, schools, utilities and communication systems in a community.
Infusorial earth
Chalk-like gray or white silicon, composed of fossilized remains of marine life, which is used for thermal insulation for steam piping, paint extenders, scouring powders, filters, etc. Also called Tripoli or Diatomaceous Earth or Diatomaceous Silica.
Ingress and egress
Access from a land parcel to a public road or other means of exit. Right to exit and enter through land owned by another.
Inharmonious
Inappropriate and possibly harmful use of land.
Inheritance
Personal property or real estate that is passed on to the heirs of a deceased.
Inheritance tax
State tax based on the value of property received through inheritance.
Inhibitor
Any substance that slows or prevents a chemical or organic reaction. Concrete set up is retarded by addition, to the cement mix, during hot weather, of starches or fatty acids.
