Applications » Attics Application


Applying attic insulation is permanent way for creating more comfortable and energy efficient home. It keeps the inner atmosphere cooler in summer and warmer in winter. By properly insulated radiant barrier insulation material, one can decrease the energy consumed and cost of heating and cooling devices. The aluminum foil material used for attic insulation reflects almost 97% of radiant heat and gives more comfortable condition inside.

Applying an attic radiant heat barrier means the heat of the sun will be reflected back out of the attic instead of crossing walls and penetrating inside. Similarly an attic radiant barrier can lower the loss of heat from the attic surface of the floor to the roof by sheathing in colder weather.

Different types of Attic Insulation material.

  • AEROLAM™ = radiant barrier + reflective insulation + vapor barrier
  • Cellulose Insulation: It will not prevent radiant heat transfer
  • Fiberglass Insulation: Fails to prevent radiant heat transfer
  • Spray Foam Insulation: Cannot prevent radiant heat transfer
  • Rockwool Insulation: won't prevent radiant heat transfer

Most of other types of attic insulations are made for resisting or impeding the flow of hot air, reflective attic insulation reflects back the radiant heat and infra red energy from the sun so it cannot penetrate inside the building. Not only this but it also reflects back the inner heat inside house so to make and keep it warm in winters. Thus it saves the energy requires to make the inner atmosphere more comfortable and also saves a money for required energy and applying smaller capacity of heating and cooling instruments. Studies have shown that attic radiant barrier can save up to 15 to 20% of energy cost. .

Benefits of installing Attic radiant barrier during the construction

Attic radiant barrier has higher barrier against moisture and can completely replace older insulation materials in warmer conditions. Reflective insulation materials can also be applicable in conjunction with other bulk insulation materials especially for the colder weather. In any typical room, around 30% of heat is gain or loss from the roof. Applying attic insulation is an easy way to insulate the walls and floors of the deck for preventing the temperature gain or loss. Reflective insulation used as a radiant barrier can be added with the existing attic as in most cases it hangs below the surface.

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.

Principal benefit of Radiant Barrier: Energy Savings

Radiant barrier attic insulation offers fastest time to payback. The cost of any insulation material is usually measured as time of payback the initial cost of insulation required through energy savings. Payback amount is generally calculated by dividing the initial amount of the insulation by the annual amount of savings in energy. Good reflective insulation materials have payback time in an average of 5 to 6 years. The insulation investment is seen as a worthwhile expense and prevents energy cost for 100 years.

Energy savings for Attic Radiant Insulation

Research and study have shown that the installation of a radiant barrier can save 22% of heat gain in a typical Florida house. It reduces the heat gain through the roof by 40%. This in result turns as a energy saving of 8 to 12% annually.

How to install radiant insulation for Attic?

Radiant barrier attic insulation material is easy to apply over the surface or under the attic roof. It can be incorporated into new building construction on top of the surface before adding the roof deck or at the bottom of the roof truss chords or rafters. In existing homes, such insulation can be easily added by attaching it to the bottom of the roof surface. However, one important thing to consider while applying this is that the reflective side of the material should face the airspace. .

Reflective insulation used as an thermal insulation is the most effective when there is at least 1/2" or more airspace between the roof surface and the insulation material. Furring strips can be added for creating more space between them. Reflective material can rest directly on some other insulation materials like fiberglass or bulk insulation. Drywall can also be directly installed over reflective insulation. It can be attached with glue. Nails, staples or can be adhere with concrete or wood. One important thing to follow is to seal all the joints through reflective tapes for better insulation and less heat penetration from the smaller gaps. In high moisture content homes, a perforated reflective insulation product would be preferable if for use stapled on top of existing insulation on attic floor..