Attic Insulation and Rodent Proofing in La Crescenta

Attic Insulation and Rodent Proofing in La Crescenta

Why attic insulation matters:

  • Slows heat transmission
  • Conserves energy
  • Reduces temperature variations in the living space (increases comfort)
  • Helps reduce overall home heating and cooling loads
  • Extends equipment life 

As a bonus, attic insulation can reduce noise and vibration throughout the home. Depending on the type of insulation you use, it can also add structural strength and improve your home’s fire resistance.

Attic Insulation in La Crescenta

Heat passes all too easily through a poorly insulated attic. In the winter, heated interior air rises naturally by convection and escapes into the attic through air leaks. Conductive heat loss through the cold ceiling makes rooms directly beneath the attic even colder. The problem reverses on a hot summer day, as attic temperatures rise to the 140-degree range and heat moves into your living space.

Attic insulation slows both conduction and convection. Insulation traps air, which makes it more difficult for heat to travel from space to space. Insulation R-value is a measurement of its effectiveness in accomplishing that task. The higher the R-value, the stronger the insulation.

How Much Insulation Does the Attic Need?

Different areas of your home have different R-value recommendations, and homes in different areas of the country have different recommendations based on the climate and cost effectiveness of the insulation.

Nominal R-Value vs. Effective R-Value

The R-value indicated on the packaging tells how much thermal resistance the insulation provides per inch. Of course, this number is merely the nominal R-value. Other factors in the real world impact how well the insulation lives up to its rating.

 Insulation Installation in La Crescenta

If the insulation needs to be compressed so it fits into the space, this decreases attic insulation R-value by minimizing air pockets within the product and thus lowering its thermal resistance.


A variety of insulation types—including fiberglass batts, expanded polystyrene (EPS) and extruded polystyrene (XPS)—can be more effective when the temperature drops outside. Oddly, when it’s above 60 degrees, the insulation can perform below its nominal R-value.

Temperature has the opposite effect on one popular type of insulation called polyisocyanurate, often simply called polyiso. This insulation decreases in R-value as it gets colder outside. Solutions for this problem include using more polyiso, covering it with another type of insulation to keep it warmer, or counting on exterior insulation instead of cavity insulation to meet your requirements.

Contact Neo Attic Solutions to schedule a free, no-obligation consultation. We can look into your attic and crawl spaces to identify what if anything would make a difference for your comfort and peace of mind. 

Call us for a FREE INSPECTION today!