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IS BIGGER BETTER WHEN IT COMES TO R-VALUE?

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Building codes say R-30 is the minimum effective R-value for an Arizona attic. Most roofers and energy experts say R-38 is the most effective.


Still, you’ll see sales pitches for a combination of insulation and radiant barriers or other products that will achieve R-60 in the attic. Save your money.
 
Attic insulation actually reaches a point of diminishing returns when you install more than you need. Stick with R-38. It’s all you need.

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  • Sanderson Ford

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