Attic Insulation - If Your Hot, It Needs Help
Wouldn't it be nice to reduce your energy costs year round - not just in winter? Shouldn't your insulation also keep you cool in the summer? Unless you're in a climate that doesn't have a summer heat (North Pole), you need more than standard mass insulation. Products such as fiberglass, cellulose and rigid board won't prevent radiant heat transfer (the primary source of heat flow in and out of your home). In addition, those insulation types lose R-value when any humidity exists. Humidity exists in all real-world environments. See how R-values are tested. To create a more comfortable and energy efficient home, keeping you cooler in summer and warmer in the winter, a complete attic insulation system will provide high R-value (unaffected by humidity) and a radiant heat barrier.
How Does Prodex Total Attic Insulation work so well?
Prodex Total Reflective Insulation - R 16 reduces the transfer of heat across air space by the use of two surfaces having high thermal reflectance and low emittance. This thermal insulation uses closed cell foam plus two aluminum surfaces and trapped airspaces to form an efficient insulation system. Prodex Total is ICCES Recognized. The R-value of reflective insulation and mass insulation is based on the same fundamental equation (The ability to stop heat transfer).
Prodex Total = Insulation R-value 16 + Radiant Barrier + Vapor Barrier All in One Product!
Prodex Total: 13/64 inch (approx. 3/16") - 5mm closed cell polyethylene foam covered on both sides with .0012 inch (0.03mm) aluminum foil facing.
Insulation Needs In Colder Climates
You don't want to lose R-value when you need it most. Ideally you want a product whose R-value is not reduced by moisture. You'll lose R-value with fiberglass and cellulose in most attic conditions during the winter - The R-value Myth. Prodex Total can be used as a stand-alone or supplemental insulation to bulk insulation materials in colder climates. The Prodex R-value is unaffected by humidity and water.
Insulation Needs In The Summer
In the summer or in warmer climates, it imperative you prevent radiant heat transfer (the primary source of heat flow in and out of your house). Prodex Total reduces radiant heat transfer through the attic by 97%. Installing Prodex in the attic roof means that the heat from 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.
The radiant barrier component of Prodex addresses the summer heat gain. Heat gain is higher in the attic because the sun is beating down on it all day (it's not uncommon to have summer daytime temperatures in an attic cavity that exceeds 150 degrees F). Because heat rises, you'll have more winter heat loss through your attic roof than through your walls; therefore, it is more important having a higher R in the attic than the walls. The sun's heat is absorbed by a roof, heating the roof sheathing and causing the underside of the sheathing and the roof framing to radiate downward toward the attic floor. When attic insulation with a radiant barrier component is placed above the roofing or directly underneath the roofing material, much of the heat radiated from the hot roof is reflected back out through the roof. This results in a cooler home and a reduction in your cooling costs.
In a typical home, up to 30 percent of the heat is lost through the attic roof. Adding Prodex Total is an easy upgrade. It can be easily added to an existing attic as it hangs below the rafters.
Other Types of Attic Insulation
Blankets or Batts - Blanket insulation is made of fiberglass, cotton, sheep's wool, or mineral wool. It will protect against the expanding and rising flow of warm air; thereby trapping your heat inside. R-values are roughly 3.2 per inch. Moisture, compressing and bridging will compromise its performance.
Cellulose - Cellulose Insulation (also referred to as Blown in Insulation) is composed of loose-fill shredded and treated newspaper. Its R-value per inch is approximately 3.5. Moisture absorption in cellulose insulation can make it heavier, causing it to become compacted and lose R value. It is prone to create too much dust that is blown into the house through inadequate seals around fixtures or minute holes - This can be a health issue especially in a carpet-less home where dust stays airborne longer.
Sprayed Polyurethane Foam - Sprayed foam is used houses to seal air, 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.
None of these bulk insulations prevent radiant heat transfer (The primary source of heat-flow).
While other types of attic insulations are made to resist or impede the flow of warn air, Prodex Total Insulation reflects back infra-red energy from the sun so it does not penetrate the home or building. It also reflects back radiant heat inside the house or building 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.
Is the best Insulation Type moldy fiberglass, a rigid board, wet cellulose, toxic spray, collapsing bubble or Prodex Total attic insulation?
Installing Attic Insulation
You can use one or two layers of Prodex Total. You can use as standalone or combine it with another insulation type. You can install over, under or between the joists. Click for various ways to install attic insulation.
Energy Savings - Payback on Investment in Attic Insulation
The cost of insulation is measured as the time to payback the initial cost of the insulation through energy savings. Payback is calculated by dividing the initial cost of the attic radiant barrier by the annual amount of savings in energy costs. Economic gains from installing a radiant barrier in the attic are well documented. Studies show that an attic radiant barrier can save as much as 17 percent on air conditioning energy costs. Research conducted by the Florida Solar Energy Center (FSEC) has shown that the installation of a radiant barrier can generate significant financial savings. About 22 percent of the heat gain in a typical Florida house comes through the attic. An attic radiant barrier reduces heat gain through the roof by about 40 percent. The summer peak energy use savings was as much as 27 percent. This study also showed that the average peak reduction from the radiant barrier system was three times as great as the savings produced by adding more fiberglass insulation (a change from R-13 to R-19). Whole house tests run by the Mineral Insulation Manufacturers Association and the Oak Ridge National Laboratory show the average reductions in ceiling heat flow from the addition of a radiant barrier stapled under the rafters between 24 and 30 percent compared with R 19 attic floor insulation and no attic radiant barrier insulation. The US Department of Energy Attic Radiant Barrier Fact Sheet (DOE/CE-0335P) states that reductions in the cost of cooling can reach up to 17% by proper installation of an attic radiant barrier. The Oxford City Council has estimated that the cost to add insulation to an un-insulated attic will pay back in 2 years. Estimates are that insulating an un-insulated attic saves 25 percent on heating costs in cold climates. Heavily insulating the attic (R value + radiant barrier) is usually seen as a worthwhile investment. You can almost never have too much insulation.
What is the Prodex Total Attic Insulation Difference?
ICC-ES Recognized : R 16 unaffected by humidity : Prevents condensation : Prevents 97% of radiant heat transfer : Vapor barrier : Core sealed on both 175' side with flange : Elastic : 19dba contact noise reduction : 90 degree Celsius (194 Fahrenheit) contact temperature rating : UV resistance : Does not promote mold or mildew : Does not provide for nesting of rodents, bugs or birds : Seals around nails (no leak) : Reflective aluminum foil on each side of 5mm (13/64) closed-cell polyethylene foam center : Keeps its shape over time (doesn't collapse) : Rippled surface increases airflow : Member of US Green Building Council - Made with 100% recyclable virgin raw materials : Over 3 billion square feet sold worldwide.
| Pinkears: Thursday, March 24, 2011
I cut the insulation to needed length, rolled it up and carried it up to the attic through a trap door and laid it on top of previously installed 1-2 inches of spray foam insulation. It was relatively easy to do and had an immediate and noticeable effect at decreasing the loss of heat. The effect was much greater than that of the spray foam, much easier to install and much cheaper. I intend to use more on my own house (this was on my daughter's house in Seattle), and also to insulate the floor joists with the 16" Prodex, stapled up, once I install radiant heat tubing...
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Attic Insulation Roll Sizes/Products:
Prodex 48 Inch, Fast Action, Perforated, 72 Inch, 24 Inch or 16 Inch.
5 Reasons To Buy Prodex Total Insulation
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- Prodex Insulation Reviews on every product page
- ICC-ES Recognized - ICC-ES is an evaluation service that takes independent test data for a variety of products and analyses it against a uniform Acceptance Criteria that is recognized internationally.
- Over 3 billion square feet sold worldwide.
Reviews - What to Believe
Updated May 9, 2016