Retrofit insulation in Evansville IN - insulated walls without tearing them open
Drafty rooms and cold walls in an older house? We seal the leaks first, then fill the walls and attic you already have.
Can you insulate an older house without tearing out the walls?
Retrofit insulation in Evansville means adding insulation to the exterior walls and attic of a house you already live in, usually without opening up finished walls. Your rooms stop running drafty, and the attic stops letting heat through.
Usually it starts with a hot upstairs, cold floors or a room over the garage nobody wants to sit in, and an attic with a thin layer that's seen better decades. The price turns on how many walls are empty, how big the attic is, how much sealing it needs, whether old material has to come out first through insulation removal, and whether we go into the walls from inside or outside. The schedule turns mostly on what we find, like wiring that has to be dealt with first, and on whether your city wants a permit. I'll give you your own number after I've seen the house in person.
How we do retrofit insulation, in the right order
I start in the attic, because that's where the truth usually is. I look at how many inches are already up there, whether any of it is soaked or full of droppings, what kind of wiring runs through the house and whether the eave vents are clear. Ruined material comes out, since new insulation on top just buries the problem. Then we do air sealing, closing the gaps in the attic floor before anything new goes down, and top it up with blown-in, which is loose fill blown through a hose. We keep it full at the edges and keep the eave vents open so the attic can still breathe. Plenty of attics around here have been insulated twice and sealed never. Finished walls can usually be filled through small holes, and I'll tell you whether going in from inside or outside makes more sense for your house. Going in from outside breaks the water barrier behind the siding, so that has to be patched or replaced, while going in from inside leaves it alone. Outside makes the most sense when you're re-siding anyway, because the house wrap can be checked or put in while the siding is off. If your house was built before 1980, there are lead safety rules you should know about when wall work disturbs the surfaces inside or out. We check each wall, since one full wall doesn't mean they all are.
Foam costs more, and it seals air while it insulates. For most attics, sealing the gaps and topping up loose fill wins, unless your ductwork lives up there, and then spray foam insulation is usually the better spend. If the attic is all you want done this year, that's straight attic insulation, and the walls can wait until the siding comes off.
Why Evansville homeowners call A&B Evansville Insulation Services for retrofit work
I write every estimate myself
I come out, look at the job and write the estimate myself, and our own crew does the work with me on most jobs. The person who told you what's in your attic is usually the one standing in it.
We'll tell you when to wait
I started this business in 2023 after learning the trade on another crew, and I'd rather tell you to fix the roof or the wiring first than sell you work that won't help. Insulation over a leak doesn't fix anything. It just hides it.
Licensed, insured and guaranteed
We're fully licensed and insured. Every job is backed by our satisfaction guarantee, which matters when a crew is drilling holes in your walls.
Built around older Evansville houses
Most of our calls come from owners of older homes in and around Evansville, and we also work in Henderson, KY, Mount Vernon, IN, Boonville, IN, Princeton, IN and other cities nearby. Older houses hide more surprises in the walls, so we go in expecting them.
Before you call (812) 205-2872 or send us a note, dig up the year your house was built, any wiring you know about and whether new siding is in the plans, since all three change how we go about the job.
Get a retrofit insulation estimate for your walls and attic
Send the form and we'll reply within one business day to set a time. I come out, look at the attic and the walls, and write the estimate myself. It's free and done on site, and there's no pressure to book.
Retrofit insulation at work
Questions before you book retrofit insulation
How much does attic insulation cost in Evansville?
Attic insulation in Evansville usually costs about $1,400 to $4,800 per job. That's what the work tends to run around here, not our price, and it covers the attic, not the walls. Your own number comes from the estimate, once I've seen what's up there.
What is the best way to insulate existing walls without opening them up?
Drill and fill is the common way, and it doesn't mean tearing out drywall. Small holes go in near the top of each wall cavity, the space between the studs, and the cavity gets filled with blown-in, so the job stays much smaller than a remodel.
Do I need a permit for retrofit insulation in Evansville?
It may, and the city's list doesn't settle it either way. Evansville and Vanderburgh County require a building permit, obtained before work starts, for any alteration to a structure, structural or not, inside or out, and the city's building permit page names siding, drywall and re-roofing but not insulation. Each city and county has its own building office, so we ask the one that covers your address before we start, and when the job calls for a permit, we handle it.
What happens in the attic before new insulation goes in?
Air sealing comes first, closing the openings in the attic floor around pipes, wires and the hatch with sealant, one-part spray foam or rigid blocking, the way federal attic guidance lays it out. Can lights without an ICAT rating, the label that says they can sit in insulation, get covers first, and a federal checklist also has ventilation fans ducted to the outside instead of into the attic. Skip those steps and the new insulation spends its life fighting a draft.
Can you insulate walls that have knob and tube wiring?
Not around the wiring itself, because the federal guide on wall insulation says the electrical code doesn't allow insulation on or around knob and tube. In older houses we check the wiring before anything else, since it can change which walls get filled. Sometimes the right first call is an electrician, not us.
How do I check an insulation contractor's license in Evansville?
Ask the contractor for their license and a certificate of insurance, since Evansville and Vanderburgh County require licensed contractors for work on buildings. The city's contractor licensing page lists a certificate of insurance, workers' compensation if it applies and a $25,000 surety or performance bond for license renewals, so you know what to look for.
Related work on the same house
- Spray foam insulation
Worth a look when your ducts run through the attic or the room over the garage won't stay comfortable no matter what.
- Attic insulation
For when the walls can wait and the attic is the part letting your power bill down.