R-30 Fiberglass Attic Insulation Roll
High R-value fiberglass roll insulation designed for attic floors and cathedral ceilings where deep thermal performance is required.
Technical Specifications
| Parameter | Standard Value |
|---|---|
| Actual Dimensions | 15" or 23" wide rolls, unfaced or kraft-faced |
| Unit Weight / Density | 1.2 lbs per sq ft |
| Estimated Price Range | $0.80 - $1.50 per sq ft |
| R-Value | R-30 |
| Insulation Depth | ~9.5 inches thick |
| Coverage per Roll | Approx. 40–48 sq ft per roll |
Overview & Cost Implications
R-30 attic insulation significantly reduces heat gain and loss through the roof plane. The US Department of Energy recommends R-38 to R-60 for attics in cold climates, so R-30 is often installed as a base layer with additional blown-in on top.
Standard Formula Used
For estimating materials quantity and weight on job sites, estimators use this mathematical model:
Rolls = Attic Area (sq ft) / 44 × 1.05 (waste) INTEGRATED ESTIMATOR
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