Eagle Shield articles - Garrett Harwood

Eagle Shield Insulation

Cold climates

In cold conditions, the main aim is to reduce heat flow out of the building. The components of the building envelope - windows, doors, roofs, walls, and air infiltration barriers are all important sources of heat loss; in an otherwise well insulated home, windows will then become an important source of heat transfer. The resistance to conducted heat loss for standard glazing corresponds to an R-value of about 0.17W/m2/Ko (compared to 2-4W/m2/Ko for glasswool batts). Losses can be reduced by good weatherisation, bulk insulation, and minimising the amount of non-insulative (particularly non-solar facing) glazing. Indoor thermal radiation can also be a disadvantage with spectrally selective (low-e, low-emissivity) glazing. Some insulated glazing systems can double to triple R values.

Eagle Shield Radiant Barrier - Floors

Radiant barriers are also quite effective in floor systems above unheated basements and crawl spaces. The radiant barrier may be either stapled below the floor joists, creating a single reflective air space, or between the joists, followed by some type of sheathing. Radiant barrier works extremely well in this application for two reasons.[9] First, a radiant barrier that is not perforated for breathability acts as an excellent vapor barrier. This means that ground moisture will not be able to pass through the radiant barrier and enter the living space. Secondly, the floor is the only part of the building where the heat flow is always down, unlike a roof where the heat would be coming down during the summer and rising to escape in the winter.[13] When the heat flow is down, 93% of the heat is radiant heat, which is exactly what the radiant barrier is designed to block.(Garrett Harwood article)

Eagle Shield Franchise Group terms and definitions:

Adhesive

A substance used to bond materials by surface attachment.

Cellular Polyurethane

Insulation composed principally of the catalyzed reaction product of polyisocyanate and polyol compounds, processed usually with fluorocarbon or hydrocarbon gas to form a rigid foam having a predominately closed-cell structure.

Eagle Shield Industries

Knee Walls

Walls of varying length. Used to provide additional support to roof rafters with a wide span or to finish off an attic. An example of these are the short walls usually found in the top floor/attic of a cape cod style home. Garrett Harwood
Heel

The outside radius of an elbow.

For more information check the following articles: Eagle Shield Radiant Barrier, Eagle Shield Franchise Group and Eagle Shield.

Eagle Shield Franchise Group

Building insulation Advantages

- Blocks airflow by expanding and sealing off leaks, gaps and penetrations.
- Can serve as a semi-permeable vapor barrier with a better permeability rating than plastic sheeting vapor barriers and consequently reduce the build up of moisture, which can cause mold growth.
- Can fill wall cavities in finished walls without tearing the walls apart (as required with batts).
- Works well in tight spaces (like loose-fill, but superior).
- Provides acoustical insulation (like loose-fill, but superior).
- Expands while curing, filling bypasses, and providing excellent resistance to air infiltration (unlike batts and blankets, which can leave bypasses and air pockets, and superior to some types of loose-fill. Wet-spray cellulose is comparable.).
- Increases structural stability (unlike loose-fill, similar to wet-spray cellulose).
- Can be used in places where loose-fill cannot, such as between joists and rafters. When used between rafters, the spray foam can cover up the nails protruding from the underside of the sheathing, protecting your head.
- Can be applied in small quantities.
- Cementitious foam is fireproof.

Eagle Shield Radiant Barrier - Thermal Insulation

Thermal insulation in buildings is an important factor to achieving thermal comfort for its occupants. Insulation reduces unwanted heat loss or gain and can decrease the energy demands of heating and cooling systems. It does not necessarily deal with issues of adequate ventilation and may or may not affect the level of sound insulation. In a narrow sense insulation can just refer to the insulation materials employed to slow heat loss, such as: cellulose, glass wool, rock wool, polystyrene, urethane foam, vermiculite, perlite, wood fibre, plant fibre (canabis, flax, cotton, cork, etc.), plant straw, animal fibre (sheep's wool), cement, and earth or soil, but it can also involve a range of designs and techniques to address the main modes of heat transfer - conduction, radiation and convection materials.(Garrett Harwood article)

Eagle Shield Insulation terms and definitions:

Water Vapor Permeance

1. The ratio of water vapor flow to the vapor pressure difference between the two surfaces of a sheet of material (or the assembly between parallel surfaces). Permeance is measured in perms. 2. The time rate of water vapor transmission through unit area of flat material or construction induced by unit vapor pressure difference between two specific surfaces, under specified temperature and humidity conditions.

Waterproof

Impervious to prolonged exposure to water or water entry.

Eagle Shield

Abatement

To reduce or make void any substance such as the removal of noise, asbestos or lead. Garrett Harwood
Unfaced Insulation

Insulation with no attached vapor retarder or facing.

For more information check the following articles: Eagle Shield Reflective Insulation, Eagle Shield Industries and Eagle Shield.

Eagle Shield Franchise Group

Limited capacity for insulation
A building design may have limited capacity for insulation in some areas of the structure. A common construction design is based on stud walls, in which thermal bridges are common in wood or steel studs and joists, which are typically fastened with metal. Notable areas that most commonly lack sufficient insulation are the corners of buildings, and areas where insulation has been removed or displaced to make room for system infrastructure, such as electrical boxes (outlets and light switches), plumbing, fire alarm equipment, etc.

Eagle Shield - Building insulation

Maintaining acceptable temperatures in buildings (by heating and cooling) uses a large proportion of global energy consumption. When well insulated, a building:

* is energy-efficient, thus saving the owner money.
* provides more uniform temperatures throughout the space. There is less temperature gradient both vertically (between ankle height and head height) and horizontally from exterior walls, ceilings and windows to the interior walls, thus producing a more comfortable occupant environment when outside temperatures are extremely cold or hot.
* has minimal recurring expense. Unlike heating and cooling equipment, insulation is permanent and does not require maintenance, upkeep, or adjustment.

Many forms of thermal insulation also reduce noise and vibration, both coming from the outside and from other rooms inside a building, thus producing a more comfortable environment.

Window insulation film can be applied in weatherization applications to reduce incoming thermal radiation in summer and loss in winter.

In industry, energy has to be expended to raise, lower, or maintain the temperature of objects or process fluids. If these are not insulated, this increases the energy requirements of a process, and therefore the cost and environmental impact.

Eagle Shield Industries terms and definitions:

LEED

LEED -- Leadership in Energy and Environmental Design-- is a rating system developed by the US Green Building Council.

Gable End Walls

The triangular end of an exterior wall above the eaves. (The wall with the pointy part.)

Eagle Shield Inc

High Pressure Steam

Steam at or above 75 pounds per square inch gauge pressure.

Cellular Insulation

Insulation composed of small, individual cells separated from each other. The cellular material may be glass or plastic such as polystyrene, polyurethane, polyisocyanurate or elastomeric.

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.

Eagle Shield Franchise Group

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.