Is Your Attic Insulation Costing You Money? McKinney Guide

Attic Insulation Guide for McKinney Homeowners

In North Texas, your attic insulation is one of the biggest factors in home comfort and energy costs. McKinney summers push attic temperatures above 150 degrees, and without proper insulation, that heat radiates into your living space and forces your HVAC system to work overtime.

Recommended R-Values

The Department of Energy recommends R-38 to R-60 for attics in North Texas (Climate Zone 3). Many McKinney homes, particularly those built before 2010, have R-19 or less, roughly half the recommended level.

Insulation Types Compared

• Blown-in fiberglass or cellulose: The most common upgrade. Cost ranges from $1 to $2 per square foot installed. Quick installation with minimal disruption.
• Spray foam (open-cell): Provides both insulation and air sealing. Costs $1.50 to $3 per square foot but delivers superior performance in sealing attic penetrations and gaps.
• Spray foam (closed-cell): Highest R-value per inch and adds structural rigidity. Best for specific applications rather than entire attic coverage due to higher cost.

Energy Savings

Upgrading from R-19 to R-49 can reduce cooling costs by 15 to 25 percent in a typical Collin County home. Many homeowners recoup the insulation investment within three to five years through lower utility bills alone.