What is thermal insulation of buildings? Please give complete details.?

Question

Thermal insulation for walls, floors, R.C.C roof, wooden doors, glass & aluminium windows etc
Types/products of Thermal insulations available etc

Answer 1

Thermal insulation of a building refers to the walls, windows, and doors (anything exposed to the outside elements and atmosphere), and their ability to restrict the passage of heat from the inside out or outside in. All materials are measured in terms of R value, or thermal resistance. When calculating the amount of heat allowed to transmit through a wall, window, door, or other building component, the formula to use is Q=UA(Toutside - Tinside) where

Q= the amount of heat transfered expressed in Btus/hr
U=thermal conductance of building component that the heat is trying to pass through, also U = 1/R
A= surface area of wall that makes up that component
Toutside = outside air temperature
Tinside = inside air temperature

Each different type of material or component has different abilities to restrict the flow of heat. Mainly it is due to the amount of air within the component (air within a building wall is a bad transmitter). What insulation trys to do is break up the wall into numerous small air pockets. Heat has to first raise the temperature of the first pocket before it can heat up the pocket next to it. This occurs over and over until there is not enough heat to keep heating up air pockets. Fiberglass insulation has millions of these air pockets and therefor makes a great insulator. Stone (brick) or metal on the other hand has none so after you heat up the material, the heat then can begin to heat up the next thing to it, probably the atmosphere.

So a material with a high R value restricts the flow of heat more than that of one that has a low R value. Window, since they are normally made up of one or two panels of glass typically are the highest point of heat loss/gain within a structure. The worst types are the ones constructed of just a single pane of glass. More high efficient ones are made of glass that has a greater propensity to heat up, and also have a vacum between two panes of glass.

There are many types of thermal insulating products available. See the attached website for a short list. Mainly the walls are constructed with rolled-insulation (R-19 where the number denotes the R value) up to R-38 rolled-in insulation. There are sprayed-in the wall cavity insulations where the R-value can be as high as 48.

The main type of insulation is not just the insulation, but the type of construction of the wall. Wall constructed of plywood over 2x4's with rolled in insulation have a lower thermal insulating value than those with Brick over plywood over 2x6's since you can put more insulation within the 2x6 cavity. As you can see, the type of wall is also very important.

Answer 2

Thermal insulation means control to heat consumption that is low thermal conductivity and low heat storage properties.
We have used thermal insulation products for making home buildings like Insulating fire bricks, windows and so on...
We used Insulating fire bricks for making building wall which is most important role to control internal home environment.

Answer 3

Maintaining acceptable temperatures in buildings (by heating and cooling) uses a large proportion of total energy consumption worldwide[citation needed]. When well insulated, a building:

being more energy-efficient, saves the owner money.
absorbs noise and vibration, both coming from the outside and from other rooms inside the house, therefore being quieter.
is more comfortable, temperatures being more uniform throughout the house. There is less temperature gradient between exterior shell (walls, ceiling, ground floor) and the interior.
does not need extra effort and expense. Insulation is permanent and does not require maintenance, upkeep, or adjustment.

Answer 4

The term Thermal Insulation can refer to materials used to reduce the rate of heat transfer, or the methods and processes used to reduce heat transfer.

The major types of insulation are associated with the major types of heat transfer:

Reflectors are used to reduce radiative heat transfer.
Foams, fibrous materials or spaces are used to reduce conductive heat transfer by reducing physical contact between objects
Foams, fibrous materials or evacuated spaces are used to reduce convective heat transfer by stopping or retarding the movement of fluids (liquids or gases) around the insulated object.
Combinations of some of these methods are often used, for example the combination of reflective surfaces and vacuum in a vacuum flask.

Understanding heat transfer is important when planning how to insulate an object or a person from heat or cold, for example with correct choice of insulated clothing, or laying insulating materials beneath in-floor heat cables or pipes in order to direct as much heat as possible upwards into the floor surface and reduce heat loss to the ground underneath.

Answer 5

Wood Certainly. Wood is a porus cellular based material. While Masonry is dense and conducts heat better. Wood is a natural insulator and doesnt conduct heat well Masonry is a poor insulator and does counduct heat.

Answer 6

Pretty good article about thermal insulation:
http://www.insulationhelp.com/v/articles/51/

Answer 7

you can use our thermal insulation software which is ISO Certified. You can also visit our website for get the detailed information about isowtc software