How Much Is the Cost of Wool Insulation?

Jenna Jonaitis
Written by Jenna Jonaitis
Updated April 5, 2023
A bright attic used as a bedroom
Photo: monkeybusinessimages / iStock / Getty Images Plus / Getty Images


  • Mineral wool insulation costs $1.40–$2.10 per square foot

  • Material and labor make up the majority of the cost

  • Batt and roll insulation is a simple DIY 

  • Blown-in insulation requires a pro

  • Insulation has an ROI of 100% or more

Get quotes from up to 3 pros!
Enter a zip below and get matched to top-rated pros near you.

Insulation plays an essential role in how comfortable and energy-efficient your home is and is a high-ROI upgrade to consider when you’re remodeling, renovating, or finishing a space like an attic. Wool insulation costs range from $1.10 to $3.10 per square foot, depending on the R-value and type of installation. Wool insulation is also a natural alternative to fiberglass insulation. Learn about the three types of wool insulation and their cost.

How Much Does It Cost to Install Wool Insulation? 

There are three main types of wool insulation. Mineral wool, also known as rockwool, is the most common, but sheep’s wool and hemp wool are also available.

Mineral Wool

Mineral wool is made of rock or slag that's heated and spun into fibers. The rockwool fibers are bound together with resin and oil to create mineral wool. You can blow in mineral wool insulation or cut pieces from rolls. 

Mineral wool offers excellent thermal insulation and is fire-resistant. Mineral wool isn’t all-natural, so it’s important to cover your skin when installing it to prevent irritation. It can also be dangerous to inhale when installing and is a possible carcinogen

Sheep’s Wool

Sheep's wool is a natural insulation made of treated sheep's wool. It offers excellent insulation and is an energy-efficient renewable product. You don't need protective gear to install sheep's wool, as it’s safe and all-natural. Sheep's wool is primarily available as batt insulation instead of blown-in. 

Hemp Wool

Natural hemp insulation is made of hemp fibers and is another eco-friendly choice. Hemp insulation is available as batt insulation and is harder to find than mineral wool and sheep's wool. You won't need protective gear to install hemp, but you'll need a saw to cut through it. 

How Much Does Wool Insulation Cost per Square Foot?

A professional insulating a drywall with glass wool
Photo: FluxFactory / E+ / Getty Images

Wool insulation costs between $1.10 and $3.10 per square foot, while mineral wool costs between $1.40 and $2.10 per square foot. To install mineral rockwool in a 1,000 square foot attic, expect to pay between $1,400 to $2,100

Wool Insulation Cost Breakdown

Wool insulation cost factors are primarily materials and labor, but you might need a few tools to do the job, depending on how you install it. Thanks to reduced utility expenses, installing insulation in your home or attic has an ROI of 100% or more


The cost of the insulation itself makes up most of the project price. The total cost depends on the square footage of your space, type of insulation, and the R-value. Higher R-values offer greater insulation performance and are more expensive than lower R-values but tend to pay off over time with lower utility costs.


The labor cost to install insulation ranges from $0.25 to $0.50 per square foot. The size of the space plays a role in the cost and how it's being installed. Blown-in insulation requires more prep and experience. Batt insulation is easier to install and doesn't require additional skills or machinery.

Tools and Supplies

If you’re using batt insulation, you’ll need a utility knife, tape measure, straight edge, staple gun, caulk gun, gloves, safety glasses, and a dust mask. You'll also need a saw to cut through the material if you're installing hemp batting, as a utility knife may not do the trick.

If you blow in mineral wool insulation, you'll need a blower machine, hose, duct tape, drop cloths, vent chutes, hard hat, and shop vac, in addition to the above tools. 

Cost to Install Wool Insulation Yourself 

You can install batt and roll insulation as a beginner DIYer with the help of a few tools. The cost mostly comes down to the material and your time. Wear protective gear if you’re working with mineral rockwool to avoid skin, eye, and lung irritation. You can install sheep’s wool and hemp wool without protective gear, but you’ll need a saw to cut hemp. 

Blown-in insulation takes more preparation, machinery, and experience to ensure it’s done right. Hire a local insulation contractor to ensure your insulation investment pays off. 

Cost to Install It Yourself vs. Hiring a Contractor 

Expect to pay about $35 to $80 per hour on average for insulation installation, depending on the type of insulation and how complex the job is. A local professional batt and roll installer can help you avoid any material hazards, and ensure your insulation is installed correctly for the biggest impact on your home’s comfort and energy efficiency.

4 Tips to Reduce the Cost of Wool Insulation

Here are a few ways to save money while installing wool insulation: 

  • Install batt insulation instead of blown-in insulation.

  • Choose mineral wool over sheep’s wool or natural hemp.

  • Put in batt or roll insulation yourself.

  • Hire out the project, but do some of the prep work yourself.

Wool Insulation Questions and Answers

What should I consider when choosing insulation type? 

The best insulation for your home depends on your climate and R-value recommendations, in addition to what area of your house you’re installing insulation. Blown-in or spray foam insulation is often best for ceilings, attics, and hard-to-reach places. If you’re looking for the safest and most eco-friendly insulation, wool insulation is often the top choice.

What other projects should I do at the same time?

While you have your walls or ceiling open to the studs, you may want to consider adding HVAC, plumbing, or electrical before putting in insulation. Rewiring a room or house, for instance, is much easier when the walls are already open. 

Need professional help with your project?
Get quotes from top-rated pros.