Printable Assembly R-Value Calculator
This one-page Letter worksheet is for anyone planning an insulation assembly and checking total R value layer by layer. It has columns for Layer, Thickness in inches, R per inch or fixed R, and Layer R. The sample rows include Inside air film, 1/2 inch drywall, and fiberglass batt, and the sheet is set up for assembly R-value calculations.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 103 KB
Free for personal, family and classroom use.
Use thickness for materials rated per inch, or leave thickness blank and enter a fixed R value in column C. Fill in each layer, then add the layer R values to estimate the total assembly performance before you build.
Good for
- Estimate wall assembly R value
- Compare insulation layer options
- Check fixed and per-inch materials
Tip: Print single-sided and keep a calculator nearby for quick total R-value checks.
4 files · XLSX, PDF, DOCX
Get every sheet: Insulation Planning Workbook
This sheet plus 3 more in one download, with the editable Excel and Word files. Excel assembly R-value and U-factor calculator with framing factor, a room heat loss workbook, a material R-value reference and an insulation upgrade planner.
$5.00 USD, one-time 4 files · about $1.25 each
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Printable Heat Loss Workbook
Printable R-Value Reference Sheet
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