The Truth About R-Values

Multiple factors can affect R-Values

While R-Values are an important measure that can be useful when evaluating insulating materials, they do not accurately describe the whole picture.  The “R” means “Resistance to heat flow”.
For example, two identical walls, with two different types of insulation of equal R-value installed in them, will not perform at the same level in real-world situations.  There have been many documented tests performed that show that factors such as:

  • air infiltration Does the material fill all cracks, crevices, joints, etc. on installation?  Does the material shrink on curing, or with time?  How much air can be felt, or measured, passing through the material?
  • extreme temperaturesDoes the R-Value increase, decrease, or stay  the same at extreme temperatures and in extreme conditions?
  • age and decayDoes the insulating material break down over time, or with exposure to certain factors (i.e. insects, wind, extreme temperature fluctuations)?  Does it lose efficiency at any point in its serviceable life span?
  • density How dense/porous is the material?  On installation?  After curing?  Does it compress or expand?

These can all have a profound effect on the performance of an insulation throughout its lifetime in service, which can directly affect its efficiency, your comfort, and your financial bottom line.

Both Stabilized Cellulose, and R-Foam are proven to excel in the area of air infiltration.   Unlike fiberglass or mineral wool, which are typically installed in batts, they visibly fill the voids in your structure better.  They enclose and encapsulate all wiring, plumbing, plate and stud holes.   This is due to their liquid state at the time of installation.  This increases R-values.

Both are susceptible to minimal, imperceptible shrinkage upon curing.  This means that they can provide a tight, uniform insulation envelope around your entire structure.  Air infiltration problems are virtually eliminated.  This effectively raises the R-Values of the insulation, and the structure.

Find out more about Stabilized Cellulose

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