D&K Davenport Insulation CompanyD&K Davenport Insulation Company

Wall insulation in Davenport IA - warm rooms without tearing your walls open

Cold outside walls and drafty rooms in an older house? We fill the empty wall cavities so your rooms hold their heat through winter.

Services
16
Service areas
12
Worker in protective gear sprays white foam insulation into the cavities of a framed wall.

Ask us to look at your walls

I walk the house with you and check which walls are empty and which aren't.

Request an estimate

Can you insulate the walls in a house that's already built?

Yes. Wall insulation for an existing house in Davenport, IA, is usually done by drill and fill. We drill small holes near the top of each wall cavity, the empty space between the studs, and fill it with blown-in insulation, loose fill pushed through a hose, so your outside walls stop pulling heat out of the room and nobody tears out drywall.

Most calls start with a room that won't warm up, an outside wall that's cold to the touch or a power bill that keeps climbing in an older house whose walls were built with little or nothing in them. The price moves with how much wall we're filling, how many stories you have, whether we work from inside or outside, and what we find once we look, like old wiring or a thin layer of old insulation that's slumped to the bottom. The schedule mostly turns on your siding plans and on anything in the walls that has to be dealt with first, and in an older house lead safety rules may apply depending on how much wall gets disturbed. I write your own number at the estimate, once I've seen the walls.

How we handle a wall insulation job

Before we drill anything, I want to know what wiring is in those walls, because old wiring changes the whole plan. If it's knob and tube, the old system of single wires strung on porcelain knobs, the electrical code doesn't allow insulation on or around it, so that gets sorted out before any fill goes in. Whether we go in from inside or outside depends on your siding and whether you're replacing it soon. Going in from outside cuts through the drainage plane, the water-shedding layer behind the siding, and that layer then has to be patched or replaced, so I lean that way only when the siding is coming off anyway. Working from inside leaves it alone, so for most houses we drill indoors after covering your floors and closing off the room to keep the dust put. Our crew fills every cavity full and packs it dense, because loose fill settles and leaves a cold gap at the top, then we plug the holes and clean up so the only thing you notice is the drafts are gone.

Insulation slows heat, but it won't stop air that's moving through gaps at outlets, window trim and the bottom of the wall, so we often pair this with air sealing services, which close those gaps first. If the floors are cold too, the trouble may start below you, and basement insulation covers the walls down there and the rim where the house sits on the foundation.

Wall insulation in Davenport, permits and the houses we see

The City of Davenport's Building Counter issues permits for building work like remodels, siding and windows, and wall insulation isn't one of the jobs its list names, so that list alone doesn't settle whether your job needs a permit. If yours does, we take care of it with the city and tell you about it up front, and if we're filling the walls as part of a re-siding job, keep in mind siding is on that list.

Davenport has plenty of older frame houses with walls that were built empty or hold a thin, settled layer from decades back. We see the same kind of house on jobs in Rock Island and Bettendorf, and we work cities on both sides of the river in Iowa and Illinois, including plenty that don't have their own page here.

Why call us for wall insulation

  • The owner writes your estimate

    I come out to look at your walls and write the estimate, our crew does the work, and I check the finished job with you. You're dealing with the person who planned it from the first look to the last walk-through.

  • Learned on Davenport job sites

    I grew up crawling through attics on my dad's crew around Davenport and started this business in 2021, five years ago now. He taught me to work in the right order, so a wet wall or bad wiring gets fixed before insulation hides it, and I'll tell you straight if your walls aren't the real problem.

  • Licensed and insured for in-home work

    We're licensed and insured. When a crew is drilling into the walls of your house, you should know they're covered.

Phone
(563) 265-6737
Hours
Mon–Fri: 7 AM–10 PM, Sat–Sun: 8 AM–9 PM
Location
Davenport, IA 52801

Have your house's age, any siding plans and any wiring you know about handy, then call (563) 265-6737 or send us the details.

Get a wall insulation estimate at your house

Send the form and we'll reply within one business day to set a time. I come out, look at your walls and write the estimate right there. It's free, with no pressure and no obligation.

Location
Davenport, IA 52801
Hours
Mon–Fri: 7 AM–10 PM, Sat–Sun: 8 AM–9 PM
Credentials
Licensed and insured.

Frequently asked questions

Can my walls be insulated without tearing them open?

Yes, most walls can be filled through small holes instead of being opened up. The holes go near the top of each wall cavity, either inside through the drywall or plaster or outside through the siding, and they're plugged and patched once the cavity is full.

Should I insulate my walls when I replace my siding in Davenport?

Yes, re-siding is the easiest and least expensive time to insulate and air seal your walls, because the old siding is off and the walls are open from outside. Adding insulation on the outside of the walls at that point can cost only a little more than the siding itself, so if you're planning new siding, tell me at the estimate and we'll plan around it.

How much does blown-in wall insulation cost?

Across the US, installing blown-in wall insulation usually costs about $4 to $4.50 per square foot. That's a national figure, not a Davenport quote, so I measure your walls and write your price at the estimate.

Who is allowed to do insulation work on a house in Davenport?

Davenport generally requires building work to be done by a licensed and bonded contractor, and Iowa requires contractors who earn $2,000 or more a year from construction to register with the state. If you hold title to a single-family home, the city lets you do your own remodeling without a contractor license, but that doesn't cover electrical, mechanical or plumbing work.

How do I know if blown-in insulation filled the whole wall?

Infrared imaging is a recommended way to check, because it shows the framing inside the wall and any spots the fill missed. Gaps show up best when it's much colder or hotter outside than in, so it's fair to ask any crew when they plan to check their work.

What is the best way to tell if my walls already have insulation?

The quickest check is an outlet on an outside wall. With the breaker off, take the cover plate off and shine a flashlight along the edge of the box to see whether there's insulation, loose fill or nothing at all. I check at the estimate too, since in an older house one wall can be filled and the next one empty.

  • Air sealing services

    If you feel a draft at outlets, baseboards or window trim, sealing those gaps stops the moving air that insulation by itself can't.

  • Basement insulation

    Cold floors and a chilly lower level usually point to the basement walls and rim, and this is the work that warms them up.

(563) 265-6737Request an estimate