How much does it cost to insulate an attic yourself?
About $1,050 in materials for a 750 sq ft attic in climate zone 5, insulated to R-60, against roughly $750 to $1,650 to hire it out.
Estimate only, computed from the insulation calculator's default inputs and prices. Your sizes and local prices will change it.
Do it yourself (materials)
$1,050
Hire it out
$750 to $1,650
Worked example: a 750 sq ft attic in climate zone 5, insulated to R-60
| Item | Estimate |
|---|---|
| Blown fiberglass: 25 bags | $1,050 |
| Total | $1,050 |
Assumptions
- Blown-in fiberglass over an attic with no usable existing insulation
- 10% waste, at the calculator's default bag price
- Blower rental, air sealing, baffles and vent work are extra
What changes the price
- Many stores lend a blower with a large enough bag order. Ask first, because a rental changes the math on a small attic.
- Air seal before you insulate: gaps around lights, plumbing and the attic hatch can undercut the new insulation.
- Homes built before about 1990 may have vermiculite, which can contain asbestos. Have it tested before you disturb it.
Price your own project
Enter your measurements and local prices in the free insulation calculator for a full materials list and cost.
Open the insulation calculatorAlso useful: Attic ventilation cheat sheet
FAQ
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Where do these numbers come from?
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