Cellulose Insulation - 6 Problems With This Insulation
- Moisture Causes Cellulose Insulation to Loose Insulation R-value
- Health Issue Concerns with Cellulose Insulation
- Uneven Distribution of Cellulose Insulation Means Lower R-value
- Thermal Bridging Results in Lower R-value
- Shorting by Contractor Means You Don't Get What You Paid For
- It Doesn't Prevent Radiant Heat Transfer
1. Moisture Causes Cellulose Insulation to Lose Insulation R-Value
Moisture absorption in cellulose insulation can make it heavier, causing it to become compacted and lose insulation r-value.
2. Health Issue Concerns with Cellulose Insulation
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. Prodex Total Insulation is unaffected by moisture and is composed of 100 percent virgin recyclable materials.
3. Uneven Distribution of Cellulose Insulation Means Lower R-value
Problems can occur relating to the distribution of the cellulose. It can be difficult to maintain an even distribution of the cellulose. The insulation slides down from the center peak of the house towards the edges. You're left with little or no insulation along the middle of the ceiling. A failure to insulate 5% of an attic results in a 52% heat loss. Not very air-tight, air can flow through the insulation especially when coverage is light. Installing Prodex Total insulation over the studs creates an air, vapor and radiant barrier.
4. Thermal Bridging Results in Lower R-value
The actual R value of cellulose insulation may be lower by as much as 20% due to wood framing. Wood framing that holds the insulation in place reduces its effectiveness. Wood conducts heat faster than insulation, a phenomenon known as "thermal bridging." Cellulose insulation in a 2-by-6 wall can be rated R-19 by its manufacturer, but the conductive effects of the wood framing would reduce this to R-15. Installing Prodex Total insulation R 16 over the studs rather than blowing in cellulose between the studs solves the bridging dilemma.
5. Shorting by Contractor Mean You Don't Get What You Paid For
You need to be concerned with shorting by your contractor. Shorting means that all the material needed to achieve a given R-value is not installed. For example, the average settled depth of cellulose is 5-1/2 inches for an attic requiring R-30. It should be at least 8 inches. This is a case of an attic being shorted 31%. The average customer only gets an R-value of 19 on an R-30 request. Prodex is an easy DIY installation project. No need to pay for a contractor or be concerned with shorting.
6. Cellulose Insulation Doesn't Prevent Radiant Heat Transfer
Cellulose insulation will not prevent radiant heat transfer (The primary source of heat-flow in and out of your structure). Without a radiant barrier, when the roof gets hot, it radiates solar-generated heat down into the cellulose insulation on the attic floor. Cellulose insulation primarily reduces heat transfer by trapping the warm air. It has a high radiant heat transfer rate; therefore, it's a good radiator of this absorbed and retained heat. As the surface of the insulation radiate infrared rays in all directions, the heat trapped in the cellulose insulation during the day will radiate down through the ceiling into the air-conditioned living space at night. This means you'll need to run the air-conditioning system at night and thereby waste more money. If you're going to use cellulose, at least supplement it with reflective insulation.
Testing To Determine R-value - Bias?
R-value is a number that is supposed to indicate a material's ability to resist heat loss. It is derived by taking the k-value of a product and dividing it into the number one. The k-value is the actual measurement of heat transferred through a specific material.
The test used to produce the k-value is an ASYM (American Society for Testing and Materials) test. This ASTM test was designed by a committee to give us measurement values that they hoped would be meaningful. Unfortunately, the test was designed with a bias - Why? Big money behind fiber insulation. Because of the way it's designed, the test favors fiber insulations: fiberglass, rock wool and cellulose. Very little input went into the test for reflective insulations.
The test doesn't account for air movement (wind) or any amount of moisture (water vapor). In other words, the test use for R-value is a test in non-real-world conditions. For example, cellulose will only achieve its stated R-value if tested in an absolute zero wind and zero moisture environment. Zero wind and zero moisture are not real-word. Our houses leak air, all our buildings leak air, and they often leak water. Water vapor from the atmosphere, showers, cooking, breathing ect. constantly moves back and forth through the walls and ceilings. Even small amounts of moisture will cause a dramatic drop in its R-value.
Performance in real-world conditions
The performance of Prodex Total Insulation is not affected by wind, humidity and water. Learn how Prodex Total performs in metal buildings, pole barns, metal roofs, basements, crawl spaces, under concrete, walls, attics, radiant floors and ceilings.
5 Reasons To Buy Prodex Total Insulation
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Reviews - What to Believe
Updated May 9, 2016