If you’ve ever searched “blown in insulation” or “blow in attic insulation”, you’ve probably read through information that all pretty much says the same thing: it’s affordable, it’s effective, and hire a pro to install it. What most of those pages won’t tell you is what happens when a crew shows up at your house in July, how long it takes, what they’re checking before they even turn on the machine, and how you’re supposed to know if your attic needs it in the first place.
We field more questions about blown-in insulation in July than any other month, usually right after someone’s opened an electric bill that made their eyes pop out. So, let’s walk through the process, the areas of your home it helps, and a real job out of an Olathe attic that shows why “just add insulation” is more involved than it sounds.
What “Blown-In” Means and Why the Terminology Gets Confusing
“Blown-in insulation” is loose-fill material, usually fiberglass or cellulose, installed with a machine that breaks it apart and blows it through a large hose into your attic, wall cavities, or rim joists. It’s different from batt insulation, which comes in pre-cut rolls or panels, and different from spray foam, which starts as a liquid and expands on contact.
Here’s where it gets confusing: A+ Insulation also installs something called BIBS, or Blow-In Blanket System, which uses similar equipment but is a denser, netted install designed specifically for wall cavities. When homeowners search “blowing insulation in attic,” they almost always mean the loose-fill version that goes down flat across your attic floor, not into your walls. If your project is about walls, our Blow-In Blanket System page has more detail. If it’s about the attic, keep reading.
How the Process Works
A typical blown-in attic job looks like this:
- Inspection first. Before anyone hauls equipment to your house, a technician checks your current insulation depth, looks for signs of moisture, pests, or compressed/settled material, and confirms your attic doesn’t have an air sealing problem that insulation alone won’t fix.
- Prep work. Vents, recessed lighting, and attic hatches get baffled or guarded so the new material doesn’t block airflow or sit against a heat source.
- The blow. The machine feeds material through a hose that runs into the attic, where a technician distributes it evenly across the floor to the target depth.
- Depth check. For Kansas City, that target is a minimum of R-49, which comes out to roughly 18 to 20 inches depending on the product.
Most attic jobs on an average KC home wrap up in a matter of hours. It’s one of the least disruptive home improvement projects you can schedule. No tearing out drywall or scheduling your week around a contractor.
Which Areas of Your Home Benefit
Attics get most of the attention because heat rises, and an under-insulated attic is usually the biggest single source of energy loss in a Kansas City home. But blown-in material also helps in:
- Wall cavities in older homes where the original insulation has settled or was never installed to modern standards
- Rim joists, the often-overlooked band around the top of your foundation where basements lose a surprising amount of heat and cooling
- Attics with obstructions — wiring, HVAC ductwork, odd framing — where loose-fill can flow around things that would force a batt installer to cut and compromise coverage
Reading Your Energy Bill Like a Diagnostic Tool
According to the U.S. Department of Energy, proper insulation can cut heating and cooling costs by up to 30%. That tracks with what we see on job sites around the metro: attics that are under-insulated or unevenly filled are usually driving those bills up more than homeowners realize.
A Recent Job: What We Found in a Kansas City Attic
Mike and the crew were out at a house not long ago where the homeowner had noticed her cooling bills creeping up for two summers running, but nothing inside the house looked obviously wrong. When the crew got into the attic, the insulation was original to the 1992 build: settled well below current recommendations and thin in several spots along the eaves where it had never been pushed all the way out during the initial install. After topping the attic off to proper depth, the difference showed up on the electric bills, not just in how the upstairs bedrooms felt cooler now.
Why Summer Is the Right Time to Schedule This
July heat makes the problem impossible to ignore, but it also makes the case for acting now instead of waiting. Insulating before the hottest stretch of summer means you capture savings for the rest of the season instead of just watching the thermostat fight a losing battle. And because blown-in insulation performs year-round, whatever you install this month is already working for you when the first cold front rolls through in the fall.
Related Reading:
- Pros and Cons: Fiberglass vs. Spray Foam Insulation
- Attic Insulation Services in Kansas City
- 9 Signs Your Home Is Under-Insulated
Not Sure If Your Attic Needs This?
You don’t have to guess based on an energy bill alone. A free evaluation isn’t the same as a full energy audit. It’s a straightforward, no-obligation look at what’s happening in your attic and where you’re losing energy, so you know exactly what a project would involve before you commit to anything.
Request a Free Energy Evaluation and find out what’s really going on above your ceiling.
Frequently Asked Questions
Q: How much does blown-in insulation cost in Kansas City?
A: It depends on your attic’s square footage, current insulation depth, and how much material is needed to reach R-49. A free evaluation is the fastest way to get an accurate number for your specific home rather than a generic per-square-foot estimate.
Q: Is blown-in insulation better than batt insulation?
A: They serve different situations. Blown-in material flows around obstructions like wiring and odd framing, which makes it a better fit for most attics. Batt insulation still has its place in areas that are open and easy to access. We cover the tradeoffs in more depth in our Fiberglass vs. Spray Foam comparison.
Q: How long does a blown-in attic job take?
A: For most homes, it’s a single visit, start to finish in an afternoon. Larger attics, added air sealing, or removal of old material can extend that, which is part of what gets scoped out during your evaluation.
Q: Can I blow in insulation myself?
A: Rental kits exist, but getting consistent depth across an entire attic, especially near eaves and around obstructions is harder than it looks. Uneven coverage means uneven performance, which is why we recommend professional installation for anything beyond a very small top-off.