Oregon Attic Insulation Guide
Everything homeowners in Portland need to know about attic insulation — R-value requirements, costs, and rebates.
Climate Zone & R-Value Requirements
Oregon falls in Climate Zone 4-marine, covering cities like Portland, Salem, Eugene. The International Energy Conservation Code (IECC) requires a minimum of R-60 for attic insulation. ENERGY STAR recommends R-60 for maximum comfort and energy savings.
Energy Rates in Oregon
Oregon electricity averages 11.5 cents per kWh. This is below the national average, but insulation still pays back in 5–10 years for most homes.
Typical Insulation Costs in Oregon
| Material | DIY (material only) | Professionally Installed |
|---|---|---|
| Blown-in Fiberglass | $480–$780 | $1,200–$1,800 |
| Blown-in Cellulose | $600–$960 | $1,200–$1,800 |
| Fiberglass Batts | $360–$600 | $960–$1,440 |
| Open-Cell Spray Foam | Professional only | $1,800–$3,000 |
| Closed-Cell Spray Foam | Professional only | $3,000–$5,400 |
*Estimates based on a 1,200 sq ft attic. Use our calculator for a personalized estimate.
Rebates & Incentives in Oregon
Frequently Asked Questions
What R-value do I need in Oregon?
Oregon requires a minimum of R-60 per current building codes (IECC). ENERGY STAR recommends R-60 for best energy efficiency.
How much does attic insulation cost in Oregon?
For a typical 1,200 sq ft attic, professionally installed blown-in insulation costs $1,200–$1,800. Use our calculator for a precise estimate based on your specific attic.
What is the best insulation type for Oregon?
In Climate Zone 4-marine, blown-in cellulose or blown-in fiberglass are the most popular choices. They offer excellent coverage, good R-value per inch, and competitive pricing.
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