Eagle Shield Radiant Barrier

Consideration of materials used

Factors affecting the type and amount of insulation to use in a building include:

* Climate
* Ease of installation
* Durability - resistance to degradation from compression, moisture, decomposition, etc.
* Ease of replacement at end of life
* Cost effectiveness
* Toxicity
* Flammability
* Environmental impact and sustainability

Often a combination of materials are used to achieve an optimum solution and there are products which combine different types of insulation into a single form.

Eagle Shield Insulation - Measurement of thermal conductivity
There are a number of ways to measure thermal conductivity. Each of these is suitable for a limited range of materials, depending on the thermal properties and the medium temperature. There is a distinction between steady-state and transient techniques.

In general, steady-state techniques are useful when the temperature of the material does not change with time. This makes the signal analysis straightforward (steady state implies constant signals). The disadvantage is that a well-engineered experimental setup is usually needed. The Divided Bar (various types) is the most common device used for consolidated rock samples.

The transient techniques perform a measurement during the process of heating up. Their advantage is quicker measurements. Transient methods are usually carried out by needle probes. A method described by Angstrom involves rapidly cycling the temperature from hot to cold and back and measuring the temperature change as the heat propagates along a thin strip of material in a vacuum.

Eagle Shield Reflective Insulation terms and definitions:

Lap Adhesive

The adhesive used to seal the butt joints and laps of insulation jackets.

Relative Humidity

A measure of the amount of moisture in the air with respect to the temperature. It is the ratio of the moisture present to the maximum amount of moisture the air can hold at that temperature.

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Cellular Elastomeric

Insulation composed principally of natural or synthetic elastomers, or both, processed to form a flexible, semi-rigid or rigid foam that has a closed-cell structure.

Alkalinity

The quality of a material to be basic or alkaline when exposed to moisture or water producing a blue reaction to litmus paper. A pH measure greater than 7.0.

For more information check the following articles: Eagle Shield Radiant Barrier, Eagle Shield Insulation and Eagle Shield Inc.