Insulation Square Footage Calculator
Calculate Roof, Wall & Total Insulation Coverage in Seconds
Enter your building type and dimensions below. We will calculate your roof and wall square footage — with a 5% waste factor — so you can order with confidence.
Insulation Square Footage Calculator
Find out exactly how much insulation you need for your project — walls, roof, and total with waste factor.
Your Estimate
Send Me My Report
We will email you a detailed breakdown with product recommendations for your project.
Includes a 5% waste factor for cuts and overlaps. For immediate assistance, contact us directly.
How to Use These Measurements
The square footage totals above represent the actual surface area you need to cover, plus a 5 percent waste factor for cuts, overlaps, and odd angles. Ordering slightly more than the raw math suggests prevents the frustration of running short mid-project.
For metal buildings, the roof calculation accounts for your selected pitch because steeper roofs have more surface area than the building footprint alone. For attics, the number changes depending on whether you install at the floor level — laying material across joists — or staple directly to the underside of the rafters.
Once you have your total, match it against our product coverage charts or contact our team for a tailored recommendation. Most residential attics under 2,000 square feet can be insulated in a single weekend with two people and basic tools.
