Insulation in Arlington Heights, IL
Spray foam insulation in Arlington Heights runs $2.50-$7.50 per square foot depending on open-cell versus closed-cell, and most jobs in the village’s 1955-1975 ranch and split-level stock also need air sealing first. The dominant retrofit challenge here is original R-11 fiberglass in 2×4 walls, now settled and degraded, sitting below Illinois’s Climate Zone 5A requirement of R-49 in attics. Call (218) 261-7714 for a written price before any work starts.
Why Arlington Heights Homes Are Different
Arlington Heights’s postwar suburban boom packed the village with thousands of ranch homes and split-levels built between 1955 and 1975 on 2×4 framing with original R-11 fiberglass batts. Nearly all of those homes now sit well below current Illinois code, and the most common job we see is a full retrofit: removing or topping up aged batts, sealing the attic floor, and dense-packing walls that were never insulated to begin with. The split-level homes clustering Arlington Heights’s mid-century subdivisions share a near-universal flaw we encounter on the overwhelming majority of pre-1975 builds: the cantilevered floor assembly bridging the unheated attached garage slab and the main living level is routinely empty or holds only a single collapsed batt, leaving kitchen and dining room floors directly above the garage chronically cold all winter.
Sitting roughly 25 miles northwest of Lake Michigan, Arlington Heights falls outside the lake’s modest winter moderating buffer and lies directly in the path of Arctic air masses funneling from the northwest. January lows routinely push below 0°F, and annual heating-degree days sit well above 6,000. Cook County’s required frost penetration depth of 42 inches makes uninsulated rim joists and below-grade foundation walls a primary failure point, gaps that translate almost immediately into cold floors, frozen pipes, and severe energy loss during polar vortex events. Clustered near the historic downtown and the Metra Union Pacific Northwest corridor, earlier balloon-frame homes from the 1900s-1920s add a distinct retrofit challenge: open stud bays that run floor-to-floor with no fire blocking, requiring drill-and-fill dense-pack cellulose rather than standard batt work.
Our Main Arlington Heights Services
Most Arlington Heights homeowners calling us for the first time are dealing with one of two things: a cold upper floor or a damp, musty crawl space. These are the two jobs where the village’s housing stock and climate combine hardest.
Attic Insulation in Arlington Heights
In Arlington Heights, attic insulation means working around the village’s mid-century construction reality: shallow 2×4 or 2×6 top chords, original batts that have settled to R-8 or worse, and no air sealing at top plates, can lights, or penetrations. We seal the attic floor first, then blow cellulose or fiberglass to R-49 or R-60, and we give you before-and-after blower-door numbers so the change is documented. Read the full breakdown on our Attic Insulation in Arlington Heights page.
Crawl Space Encapsulation & Vapor Barrier in Arlington Heights
Homes built in Arlington Heights during the 1955-1975 boom often have vented crawl spaces that pull damp, cold air into the living level all winter, and a 42-inch frost depth means uninsulated foundation walls bleed heat. Encapsulation closes the vents, lines the floor and walls with a vapor barrier, and insulates the rim joist and foundation walls, turning the crawl into conditioned, dry space. See what the job involves and what it costs on our Crawl Space Encapsulation & Vapor Barrier in Arlington Heights page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Spray Foam Insulation in Arlington Heights
Spray foam in Arlington Heights is most often specified for rim joists, cantilevered garage floors, and cathedral ceilings where the village’s mid-century framing leaves too little depth for batt insulation. Closed-cell foam at 2 inches adds R-14 plus an air and vapor barrier in one pass, which matters most in split-levels where the cantilevered floor over the garage is empty or holds a single collapsed batt. We install open-cell and closed-cell Spray Foam Insulation from Owens Corning and Demilec, and every job includes before-and-after blower-door readings so you can see the air-sealing result in one figure.
Open-Cell Spray Foam
Signs you need it
Rooms below an uninsulated attic floor or above a garage with an empty cantilever bay stay cold while the rest of the house is comfortable.
What it costs in Arlington Heights
Open-cell spray foam in Arlington Heights runs $2.50-$4.00 per square foot at typical residential depths of 5-8 inches.
How we do it
We air-seal the assembly first, then spray the foam to the specified depth, let it cure, and trim it flush with the framing before documenting the finished R-value.
Closed-Cell Spray Foam
Signs you need it
Rim joists, band boards, or foundation walls show visible gaps, drafts, or condensation during cold snaps, or you need high R-value in a shallow cavity.
What it costs in Arlington Heights
Closed-cell spray foam in Arlington Heights runs $3.50-$7.50 per square foot at typical depths of 2-3 inches.
How we do it
We prep the surface, spray the foam in lifts to reach the specified depth, and check for full adhesion before the foam cures to a rigid, air-impermeable layer.
What Spray Foam Insulation Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Open-cell spray foam (attic floor or roof deck) | $2.50-$4.00 per sq ft |
| Closed-cell spray foam (rim joist, band board, foundation wall) | $3.50-$7.50 per sq ft |
| Rim joist spray foam, full basement perimeter | $900-$2,100 total |
Is closed-cell foam worth the extra cost in Arlington Heights?
For rim joists, yes. Closed-cell adds R-value per inch and acts as a vapor barrier, which matters in Arlington Heights where 42-inch frost depth and Arctic air masses push cold through uninsulated band boards.
Can you spray foam a cantilevered garage floor in a split-level?
Yes, that is one of the most common spray foam jobs in Arlington Heights split-levels. We remove the soffit, seal the framing, and spray closed-cell into the cantilever bay, which stops cold air from reaching the kitchen or dining room floor above. Call (218) 261-7714 for a written price.
Blown-In Insulation in Arlington Heights
Blown-in insulation in Arlington Heights is the standard retrofit for attics in ranch and split-level homes built between 1955 and 1975, where original R-11 batts have settled and left the ceiling plane under-insulated. We blow cellulose or fiberglass over a sealed attic floor to reach R-49 or R-60, which is what Climate Zone 5A demands. Our Blown-In Insulation crews use Johns Manville and GreenFiber products, and every attic job includes air sealing before any material goes down.
Blown-In Cellulose
Signs you need it
Attic insulation measures less than R-30, or rooms on the top floor run 5-10 degrees colder than the rest of the house in winter.
What it costs in Arlington Heights
Blown-in cellulose in Arlington Heights runs $1.00-$2.00 per square foot, with an attic top-up to R-49 typically costing $1,900-$3,800 on a 1,200-1,800 sq ft home.
How we do it
We seal the attic floor penetrations first, then blow cellulose to the specified depth with a calibrated machine, checking depth across the entire attic.
Blown-In Fiberglass
Signs you need it
Existing fiberglass batts have settled below the top of the joists, leaving the ceiling with visible thermal striping in winter.
What it costs in Arlington Heights
Blown-in fiberglass in Arlington Heights runs $1.20-$2.20 per square foot, with a full attic fill to R-49 typically costing $2,400-$4,500.
How we do it
We install baffles at the eaves, seal the attic floor, then blow fiberglass to the specified depth and record the final R-value in the job documentation.
What Blown-In Insulation Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Blown-in cellulose, attic top-up to R-49 | $1,900-$3,800 |
| Blown-in fiberglass, full attic fill to R-49 | $2,400-$4,500 |
| Dense-pack cellulose, exterior wall fill | $2.50-$4.00 per sq ft of wall |
How much does blown-in insulation cost in Arlington Heights?
Most Arlington Heights ranches and split-levels pay $1,900-$4,500 for a full attic top-up to R-49, depending on square footage and whether air sealing is included. We seal first, always. Call (218) 261-7714 for a written scope.
Should I remove old insulation before blowing in new?
Not unless it is water-damaged, rodent-contaminated, or contains vermiculite. In most Arlington Heights homes, the existing batts can stay in place and new blown material goes right on top after sealing. We document the before condition in photos.
Radiant Barrier Installation in Arlington Heights
Radiant barrier in Arlington Heights targets the summer side of the equation: a roof deck that soaks up sun all afternoon and radiates heat down into the living space, which matters in mid-century ranches where the attic sits directly above the bedrooms. On July afternoons, an unshielded roof deck in Arlington Heights can reach 130°F, and a radiant barrier stapled to the rafters reflects most of that heat before it ever reaches the insulation below. We install Radiant Barrier Installation as a foil-faced product that drops attic temperatures by 20-30°F on peak days.
Attic Radiant Barrier
Signs you need it
Upstairs rooms run 8-12 degrees hotter than the rest of the house in summer, and the attic feels like an oven by mid-afternoon.
What it costs in Arlington Heights
Attic radiant barrier in Arlington Heights runs $1.50-$3.00 per square foot of attic floor area, or $2,000-$4,500 for a typical 1,200-1,800 sq ft attic.
How we do it
We staple the foil barrier to the underside of the rafters, leaving air gaps at the eaves and ridge, and verify the coverage with photos.
Radiant Barrier & Ventilation
Signs you need it
Attic temperatures stay high even with soffit and ridge vents installed, or you are adding a radiant barrier and need to confirm the ventilation path still works.
What it costs in Arlington Heights
Radiant barrier plus ventilation assessment and upgrades in Arlington Heights runs $2,500-$5,500 depending on the vent configuration.
How we do it
We inspect the existing vent path first, install the barrier with proper air gaps, and confirm soffit-to-ridge airflow with a smoke test.
What Radiant Barrier Installation Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Attic radiant barrier, staple-up, 1,200-1,800 sq ft attic | $2,000-$4,500 |
| Radiant barrier plus ventilation work | $2,500-$5,500 |
| Radiant barrier roof deck (new construction or re-roof) | $1.80-$3.20 per sq ft |
Does radiant barrier help in Arlington Heights winters?
Radiant barrier is primarily a summer product. Its winter benefit in Arlington Heights is marginal, but it does not hurt: the attic still breathes, and the barrier adds a small reflective assist in keeping heat from radiating upward.
Can radiant barrier go over existing insulation?
Radiant barrier goes on the rafters, not over insulation. The foil needs an air gap facing down toward the attic floor to reflect heat properly, so we attach it to the underside of the roof framing. Call (218) 261-7714 for a written price.
Insulation Removal & Replacement in Arlington Heights
Insulation removal in Arlington Heights is most often driven by three things: rodent contamination from squirrels and mice in older attics, water damage from ice dams on mid-century roof decks, or the presence of vermiculite in pre-1975 homes. When insulation has been compromised, blowing new material over the top just seals the problem in, so we remove, sanitize, and replace. Our Insulation Removal & Replacement work includes full documentation of the before condition, the removal process, and the final installed R-value.
Attic Insulation Removal
Signs you need it
Insulation is matted, water-stained, or compressed below half its original depth, or you are planning air sealing and the old material is too degraded to work around.
What it costs in Arlington Heights
Attic insulation removal in Arlington Heights runs $1.50-$3.00 per square foot, with a typical 1,200-1,800 sq ft attic costing $2,000-$5,500.
How we do it
We run a truck-mounted vacuum line to the attic, bag the removed material, and leave the attic floor clean and ready for air sealing.
Contaminated Insulation Removal
Signs you need it
Insulation shows rodent droppings, urine staining, nesting debris, or has been saturated by a roof leak and now holds mold.
What it costs in Arlington Heights
Contaminated insulation removal in Arlington Heights runs $2.00-$4.00 per square foot, including sanitizing and decontamination.
How we do it
We remove the contaminated material under containment, sanitize the attic surfaces, and prepare the space for new insulation with the same documentation standard.
What Insulation Removal & Replacement Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Attic insulation removal, standard | $1.50-$3.00 per sq ft |
| Contaminated insulation removal with sanitizing | $2.00-$4.00 per sq ft |
| Full removal plus replacement insulation to R-49 | $4,500-$9,500 total |
How do I know if my Arlington Heights attic has vermiculite?
Vermiculite is a shiny, flaky, gray-brown material that looks like small accordion-shaped pebbles. If you have it, do not disturb it; we can test and, if needed, remove it under proper containment. Call (218) 261-7714 to schedule an inspection.
Is it cheaper to remove or just add more insulation?
Adding is almost always cheaper, around $1,900-$4,500 for a full top-up. But if the existing material is contaminated or water-damaged, removal first is the only choice that protects the rest of the job, and we will give you a written price for both paths.
Attic Air Sealing in Arlington Heights
Attic air sealing in Arlington Heights is the prerequisite work we do before any insulation goes down, because a sealed attic floor is what makes the R-value actually perform. In the village’s ranch and split-level stock, the typical attic floor leaks through recessed can lights, top plates, plumbing and electrical penetrations, and the attic hatch, and those leaks add up to the equivalent of leaving a window open all winter. Our Attic Air Sealing work includes before-and-after blower-door readings on every job, so the change is documented as a number, not a feeling.
Attic Floor Air Sealing
Signs you need it
Upstairs rooms are drafty, heating bills run higher than similarly-sized homes in your neighborhood, or you can feel air moving around the attic hatch.
What it costs in Arlington Heights
Full attic floor air sealing in Arlington Heights runs $1,500-$3,500 for a typical 1,200-1,800 sq ft home.
How we do it
We clear insulation from the attic floor, seal every penetration with foam or caulk, build air-tight boxes over can lights, and weatherstrip the hatch before reinstalling insulation.
Top Plate & Penetration Sealing
Signs you need it
You feel drafts along interior walls on the top floor, or a thermal camera shows cold bands where walls meet the ceiling.
What it costs in Arlington Heights
Top plate and penetration sealing in Arlington Heights runs $600-$1,500 as a standalone job, or is included in a full attic air sealing package.
How we do it
We pull back insulation at the wall line, seal the top plate with foam, and seal every wire, pipe, and duct penetration we find.
What Attic Air Sealing Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Full attic floor air sealing | $1,500-$3,500 |
| Top plate and penetration sealing, standalone | $600-$1,500 |
| Blower-door test with air sealing package | $200-$400 (included with full jobs) |
What does a blower-door test show in Arlington Heights?
A blower-door test measures, in cubic feet per minute at 50 pascals (CFM50), how much air your building envelope is losing. Typical Arlington Heights ranches read 4,000-6,000 CFM50 before sealing and often drop by 40-50% after. Call (218) 261-7714 to schedule one.
Can I seal my attic floor myself in Arlington Heights?
You can, but recessed can lights and top plates are genuinely dangerous to seal wrong, and open-cell foam around lighting fixtures is a fire hazard. We recommend a trained professional for anything involving electrical or fire-rated enclosures.
Wall Insulation in Arlington Heights
Wall insulation in Arlington Heights is a drill-and-fill retrofit on most jobs, because the village’s 1955-1975 ranch and split-level homes were built with 2×4 walls and original R-11 batts that have settled or were never installed correctly. The earlier balloon-frame homes near downtown and the Metra corridor add a distinct challenge: open stud bays running floor-to-floor with no fire blocking require dense-pack cellulose rather than standard batt work. We also dense-pack the cantilevered floor assemblies in split-levels, which we find empty on the overwhelming majority of pre-1975 builds in Arlington Heights. Our Wall Insulation work uses Knauf and Rockwool products where applicable.
Drill & Fill Wall Insulation
Signs you need it
Walls feel cold to the touch in winter, rooms along exterior walls stay colder than interior rooms, or balloon-frame walls show no insulation in the stud bays.
What it costs in Arlington Heights
Drill-and-fill wall insulation in Arlington Heights runs $2.50-$4.00 per square foot of wall area, with a full 1,200-1,800 sq ft home typically running $4,500-$9,500.
How we do it
We drill small holes in each stud bay from the exterior, dense-pack the cavity with cellulose or fiberglass, then patch and document the fill pattern.
Injection Foam Wall Insulation
Signs you need it
Wall cavities are partially insulated, or you want an air-sealing wall job rather than just added R-value.
What it costs in Arlington Heights
Injection foam wall insulation in Arlington Heights runs $3.50-$6.00 per square foot of wall area.
How we do it
We inject slow-rise foam through small ports, letting it expand to fill the cavity and seal air paths, then verify coverage with thermal imaging.
What Wall Insulation Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Drill-and-fill dense-pack, full home walls | $4,500-$9,500 |
| Injection foam, full home walls | $5,500-$12,000 |
| Cantilever floor bay filling, per split-level | $800-$2,000 |
Do Arlington Heights split-levels always have empty cantilever floors?
We find the cantilevered floor over the garage empty or holding a single collapsed batt on the overwhelming majority of pre-1975 split-levels in Arlington Heights. It is the single most common wall-insulation defect in the village. Call (218) 261-7714 for an inspection.
Is drill-and-fill or injection foam better for my Arlington Heights home?
For most Arlington Heights ranch and split-level walls, dense-pack cellulose is the better value. Injection foam makes sense when the cavity is partially filled or you want air sealing in the same pass. We will show you the numbers for both.
Attic Cleaning & Rodent Proofing in Arlington Heights
Attic cleaning and rodent proofing in Arlington Heights is a regular job on older homes near the historic downtown and Metra corridor, where mature trees and older roof structures give squirrels and mice easy access. Once rodents have been in an attic, the insulation is contaminated with droppings and urine, and the only correct sequence is exclusion, removal, sanitizing, and then new insulation. Our Attic Cleaning & Rodent Proofing work includes a full exclusion pass to seal every entry point before we clean.
Attic Cleanout
Signs you need it
Insulation shows rodent droppings, nesting material, or you have heard activity in the attic and want the contaminated material removed.
What it costs in Arlington Heights
Attic cleanout in Arlington Heights runs $2.00-$4.00 per square foot, including removal and disposal of contaminated insulation.
How we do it
We vacuum out the contaminated insulation under containment, bag it for disposal, and leave the attic floor clean for the next step.
Rodent Proofing & Exclusion
Signs you need it
You hear scratching in walls or ceilings at dawn or dusk, or you have found droppings in the attic or along the eaves.
What it costs in Arlington Heights
Rodent proofing and exclusion in Arlington Heights runs $600-$2,000 depending on the number of entry points and roof configuration.
How we do it
We inspect the full roof perimeter and soffits, seal every entry point with steel mesh or foam, and set one-way doors where needed before any cleaning begins.
What Attic Cleaning & Rodent Proofing Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Attic cleanout with contaminated insulation removal | $2.00-$4.00 per sq ft |
| Rodent proofing and exclusion | $600-$2,000 |
| Full attic restoration: cleanout, sanitizing, sealing, new insulation | $6,000-$14,000 total |
How do rodents get into Arlington Heights attics?
Most often through gaps at the roofline, open soffit vents, or where utility lines enter. In Arlington Heights, mature tree canopies over roofs give squirrels a direct path, so exclusion starts with sealing every opening before any cleaning. Call (218) 261-7714 for a written scope.
Should I replace insulation after rodent removal in Arlington Heights?
Yes. Droppings and urine stay in the insulation even after the animals are gone, and the material can hold bacteria and odor. We remove, sanitize, seal, and then install new insulation to code. We will show you the before and after photos.
Home Energy Audit in Arlington Heights
A home energy audit in Arlington Heights is the diagnostic step that tells you exactly where your mid-century home is losing conditioned air, and the blower-door test is the centerpiece: a pressurization reading that shows, in one number, how much air your building envelope is losing. Most Arlington Heights ranches and split-levels read 4,000-6,000 CFM50 before any sealing, and the audit ranks every leak and every insulation gap so you can prioritize the work. We run the audit, hand you the numbers, and give you a written scope for the fixes it identifies. Our Home Energy Audit service includes thermal imaging on every job.
Blower Door Test
Signs you need it
Rooms are drafty, heating bills are high despite no obvious gaps, or you want a baseline number before and after insulation work.
What it costs in Arlington Heights
A standalone blower-door test in Arlington Heights runs $200-$400, and is included when we do the air sealing and insulation work.
How we do it
We mount the fan in an exterior door, depressurize the house to 50 pascals, and read the airflow in cubic feet per minute, then walk the house with a thermal camera.
Thermal Imaging Inspection
Signs you need it
You want to see where the cold spots are in walls and ceilings, or you suspect missing insulation but do not want to open walls.
What it costs in Arlington Heights
Thermal imaging inspection in Arlington Heights runs $250-$450 as a standalone service.
How we do it
We run the thermal camera across every wall and ceiling plane while the house is depressurized, then annotate the images and include them in the written report.
What Home Energy Audit Costs in Arlington Heights
| Item | Typical range in Arlington Heights |
|---|---|
| Standalone blower-door test | $200-$400 |
| Thermal imaging inspection | $250-$450 |
| Full home energy audit with written report | $500-$900 |
How long does a home energy audit take in Arlington Heights?
Most single-family homes in Arlington Heights take 2-3 hours for a full audit, including the blower-door test, thermal imaging, and insulation inspection. You walk away with a written report the same day. Call (218) 261-7714 to schedule.
Is a blower-door test worth it before insulation work?
Yes, because the number tells you whether the leaks are in the attic, the walls, or the rim joists, and that changes the order of work. We run the test before and after sealing, so you see the exact CFM50 change you paid for.
Brands We Service in Arlington Heights
We install and service insulation from Owens Corning, Johns Manville, Knauf, and Rockwool, and we keep the most common Arlington Heights retrofit materials stocked locally, so a drill-and-fill or blown-in job does not wait on a shipment. Parts and materials for standard retrofits are typically on hand within one business day. See our brands for the full list and what we stock.
Pricing for Insulation in Arlington Heights, IL
| Service | Typical range in Arlington Heights |
|---|---|
| Blown-in attic insulation to R-49 | $1,900-$4,500 |
| Spray foam rim joist, full basement | $900-$2,100 |
| Open-cell spray foam, per sq ft | $2.50-$4.00 |
| Closed-cell spray foam, per sq ft | $3.50-$7.50 |
| Attic air sealing, full | $1,500-$3,500 |
| Drill-and-fill wall insulation, full home | $4,500-$9,500 |
| Attic insulation removal | $1.50-$3.00 per sq ft |
| Attic radiant barrier | $2,000-$4,500 |
| Rodent proofing and exclusion | $600-$2,000 |
| Home energy audit | $500-$900 |
Prices push higher in Arlington Heights when homes have balloon-frame walls, steep roof pitches that slow attic access, or cantilevered floors that need opening from below. Under Haven Standard Clause 1, every job gets a flat written price, a written scope, and a written warranty before anyone lifts a tool.
Neighborhoods We Serve in Arlington Heights
We work throughout Arlington Heights, and our crews are in the village most days of the week. Response time for most neighborhoods is same-day for emergency calls and within 48 hours for scheduled estimates.
- Arlington Heights Central / Historic Downtown
- Scarsdale
- Westgate
- Pioneer Park
- Hickory Meadows
Service Area - Cities Near Arlington Heights
We serve Arlington Heights and the surrounding northwest suburban area, including Des Plaines, IL, Schaumburg, IL, Skokie, IL, and Chicago, IL. Dispatch and scheduling are coordinated from our Chicago office; crews serve Arlington Heights locally.
Serving Arlington Heights, IL - Our Local Coverage Area
We’re based in the Arlington Heights area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Insulation in Arlington Heights
Most scheduled estimates in Arlington Heights happen within 48 hours, and emergency calls for water-damaged insulation or rodent entry get same-day attention. A live person answers the phone 24/7 at (218) 261-7714.
Most retrofit insulation and air sealing work in Arlington Heights does not require a permit, but if spray foam or structural changes are involved, the village may ask for documentation. We handle the paperwork and give you a written scope before any work starts.
Yes. We schedule attic and wall work around HOA access hours and your availability, and our crews arrive in uniform with a named technician who texts when they are on the way. Call (218) 261-7714 for a written price and a firm date.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 1-hour.
- 4You approve before work beginsNothing starts until you say go.
What Arlington Heights Customers Say
"Crawl space encapsulation done properly. Photographs of the vapour barrier at every seam, and the damp smell in the hallway is gone."
- Ainsley P."The winter gas bill dropped by about a third. They had estimated a quarter, so they under-promised."
- Genevieve R."Two other companies quoted to blow more insulation on top of what was there. These were the only ones who said the existing material had to come out first, and explained why."
- Clifford E.