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Your metal building insulation system should have or do the following:

1. Radiant heat barrier
2. Destroy condensation
3. High R value
4. Vapor barrier
5. Not be impacted by humidity
6. Not allow nesting for rodents, birds or bugs
7. Credentials
8. Install easily
9. Equates favorably to alternatives
   
Buy metal building insulation products that addresses all items above. Unfortunately metal buildings are uniquely affected by: Radiant heat, condensation and Cold.


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Roofing Insulation preserves energy, amend comfort and lessens utility costs.

There are many good reasons to insulate your roof. Roofing insulation helps lower total building energy consumption, appoints greater comfort levels for the building occupants and can decrease HVAC equipment requirements.

Insulate Your Roof:

• Roof insulation is one of the most efficient ways of operating the outside elements. Roof insulation foil will lessen the amount of radiant heat that accedes the home in summer by up to 97% and will also render some winter thermal protection.    
• Rigid or bulk insulation will keep convective heat inside in winter as warm inside air rises. Using the right kind and the right amount of insulation will diminish the amount of energy need to heat and cool a building. This can permit you to run your heating and cooling systems less making them last longer and can potentially minify the HVAC equipment size required thereby saving additional money.
• Properly installed roof insulation foil can also decrease the potential for condensation occurring on interior surfaces causing mold, mildew, rot and dripping. Mingling roofing insulation with enough ventilation under the roof deck will allow moisture to escape preventing ice buildup in the eaves and damage to the building.

Types of roofing insulation:

• There are two basic types of roof insulation products: Reflective insulation and bulk insulation in the form of blankets, blown-in cellulose, sprayed foam, or rigid boards. Most homes, commercial buildings and steel buildings unite foil roof insulation and bulk insulation to create a complete insulation system. These are also good flat roof insulation products. In warmer climates, insulating metal roofing is of extreme importance. Reflective insulation alone is adequate to control indoor temperatures and moisture.

Reflective roofing insulation:

• Reflective roofing insulation is made of two layers of reflective aluminum foil with a central layer of foam, plastic bubbles or fiberglass.
• It is perfect for pole barn roof insulation.
• When installed facing airspace of at least it manifests up to 97% of radiant heat while the central layer hinders the convective flow of warm air.

Blankets or batts:

• Blanket insulation is made of fiberglass, cotton, sheep's wool, or mineral wool.
• It will help against the enlarging and rising flow of warm air, thereby trapping your heat inside.
• R-values are roughly 3.2 per inch.

Rigid foam:

• Rigid foam will not compress or absorb moisture like blanket insulation which gets down insulating efficiency.
• Its higher r-value per inch makes it ideal for roofing insulation where space is confined.
• Polyisocyanates board has an average R-value of 5.8 per inch.

Sprayed polyurethane foam:

• Sprayed foam is used for metal walls and roofs to seal air and moisture leaks and control condensation.
• Sprayed foam average R-value is 5.9 per inch.
• Unlike the other forms of insulation, sprayed foam is not a do-it-yourself option.

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• The Best Attic Insulation prevents radiant heat transfer. Adding attic insulation is paramount to creating a more comfortable and energy efficient home, keeping you cooler in summer and warmer in winter.
• By properly installing a radiant barrier in your attic, you can lower your air conditioning and heating bills and can potentially extend the life of that equipment.
• The attic insulation material should be a reflective -- that is an absolute must in warmer climates. The aluminum foil material used in reflective attic insulation reduces radiant heat transfer through the attic by 97%.    
• Installing an attic radiant barrier in the attic ceiling means that the heat of the sun will be reflected back out of your attic instead of crossing the airspace to be absorbed by the insulation on the attic floor and then radiated down into your home below.
• Similarly, adding an attic radiant barrier can reducing the loss of heat from the attic floor to the roof sheathing in cold weather by reflecting attic heat downward.

Types of Attic Insulation

1. AEROLAM™ = radiant barrier + reflective insulation + vapor barrier
2. Cellulose, won't prevent radiant heat transfer,
3. Fiberglass, won't prevent radiant heat transfer,
4. Spray foam, won't prevent radiant heat transfer,
5. Rockwool, won't prevent radiant heat transfer

While other types of attic insulation are made to resist or impede the flow of warm air, a reflective attic insulations reflects back infra-red energy from the sun so it does not penetrate the building. It can also reflect back radiant heat inside the house so it does not escape. The concept is simple: each unit of radiant heat energy that is reflected away from your home in summer and each unit reflected back inside during winter means less operation of your air conditioning and heating systems, less wear and tear on your equipment, and less money you pay in utility costs. Studies show that an attic radiant barrier can save as much as 15 percent on air conditioning energy costs.

Attic Radiant Barrier Installed During New Construction:

• Attic radiant barriers are not affected by moisture and can completely replace older insulation materials in warmer climates.
• Reflective insulation can also be used effectively in conjunction with other bulk insulation materials in colder climates.

In a typical home, up to 30 percent of heat is lost through the roof. Adding attic insulation is an easy upgrade in comparison to insulating walls, floor or the roof deck in an existing building. Adding a radiant barrier is the most common home insulation retrofit project. Reflective insulation used as a radiant barrier can be easily added to an existing attic as it hangs below the rafters.

Energy Savings:

• Radiant barrier attic insulation also gives the fastest time to payback. The cost of insulation is usually measured as the time to payback the initial cost of installation through energy savings.
• Payback is calculated by dividing the initial cost of the insulation by the annual amount of savings in energy costs. Most agencies and manufacturers report the payback time on any insulation job as 5-6 years.
• Heavily insulating the attic is usually seen as a worthwhile investment as an average home will stand for 100 years or more.

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Best Insulation for Basements and Crawlspaces:

• Due to their underground environment, basements and crawl spaces have different insulation requirements than the house above.
• Moisture is the primary consideration in developing either a basement or crawl space insulation strategy. Excess moisture can stimulate mold, mildew, odors, decay, fungus growth and wood rot.    
• Moisture penetrating the basement and crawlspace can come from a multitude of sources:

• Construction materials that must dry before the basement is sealed
• Interior diffusion from humidity in warm indoor air
• Hydrostatic pressure against the foundation wall from rainfall, snow melt or irrigation creates exterior diffusion
• Air infiltration bringing moisture in with it
• Capillary rise wicking moisture up from the soil below
• Groundwater leakage through the foundation

The underground environment of walls below grade presents unique challenges. The moisture content in soil below three feet deep is almost always higher than the moisture content of the air inside. This difference in vapor pressure stimulates moisture to be driven from the soil into the basement or crawl space interior by diffusion through the wall.

A significant amount of moisture from the soil below the slab will also wick upward into the basement through the slab or directly into the crawl space.

Condensation is also a significant problem in basements and crawl spaces. Underground soil temperatures can be much colder than either the outside air or the indoor air in the basement. The warmer air of the basement constantly expands. When this warm air reaches the cooler surface of a wall next to the ground, condensation will occur on the interior of the wall. Any interior insulation will be subject to potentially large amounts of moisture driven from both the exterior and the interior depending on the season.

Refer pdf for more information :