Side-by-side specs
| Spec | Batt | Blown-In |
|---|---|---|
| Installation speed (attic) | 1–2 days DIY | 2–4 hours pro |
| Real-world R-value | 70–85% of label | 95–100% of label |
| Cost per sq ft | $0.65–$2.00 | $1.00–$2.75 |
| Best for | New construction, accessible stud bays | Retrofit attics, topping off existing |
Batt
Pros
- Predictable R-value per pack
- DIY-friendly for accessible walls
- No machine rental needed
- Easy to remove for future renovations
Cons
- Leaves gaps around wires, plumbing, framing
- R-value drops 30%+ if compressed or misaligned
- Slow over irregular framing
Blown-In
Pros
- Fills around all obstructions
- Faster on attic floors
- Higher achieved R-value in real installs
- Better for adding on top of existing insulation
Cons
- Requires a blower (rented or pro)
- Can settle 10–20% in attics
- Messy — needs containment
Which should you pick?
- Adding to existing attic insulation: Go with Blown-In. Blown-in conforms over what's already there.
- Insulating an unfinished wall before drywall: Go with Batt. Batts are faster in clean, accessible stud bays.
Frequently asked questions
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Get blown-in quotes in a top city
Local pricing and licensed contractors for Blown-In in these metros.
Blown-In in Rochester, NYBlown-In in Buffalo, NYBlown-In in Raleigh, NCBlown-In in Philadelphia, PABlown-In in Orlando, FLBlown-In in Minneapolis, MNBlown-In in Oklahoma City, OKBlown-In in Madison, WI
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