How to estimate an attic insulation job like a pro

How to estimate an attic insulation job accurately? It's simpler than you think, but one mistake can blow your budget.

Start with square footage. Measure your home's exterior footprint, not interior rooms. A 1,800 SF ranch typically needs 1,800 SF of attic coverage. Subtract major penetrations like HVAC units, but don't overthink small vents.

For Northeast Arkansas (Climate Zone 3A), aim for R-38 to R-49 in attics. If you've got R-19 blown-in and want R-38 total, you need R-19 more. Cellulose runs about $1.20-1.80 per square foot installed. Spray foam? Expect $2.50-4.00 per SF for open cell, $4.00-6.50 for closed cell.

Here's the math: 1,800 SF × $1.50 (cellulose) = $2,700. Same space in spray foam? $4,500-7,200. Big difference.

Don't forget air sealing first. Gaps around recessed lights, plumbing penetrations, and attic hatches kill efficiency. We typically find 15-25% energy savings after a proper insulation upgrade in Jonesboro homes.

Pro tip: June's perfect for attic work before July heat hits. Material costs are stable, and crews aren't swamped yet.

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