Insulation in Newport Beach, CA
Crawl space encapsulation and vapor barrier installation in Newport Beach typically runs $3,800-$7,500 for peninsula and island homes, where salt-laden harbor humidity saturates unprotected crawl spaces within a few seasons. Most jobs are completed in two days, with crews dispatched from our Los Angeles office to serve Newport Beach directly. Call (949) 403-8361 for a written price before any work starts.
On Balboa Island and the Balboa Peninsula, we’re working in 1920s-1950s beach cottages originally built as seasonal retreats with no insulation and zero-lot-line construction that makes access difficult. The marine microclimate here means moisture management, not thermal savings, is the reason homeowners call. Fiberglass batt insulation below grade in these conditions fails predictably; we spec closed-cell spray foam for rim joists and below-grade assemblies, and we publish before-and-after blower-door numbers on every job so the performance change is documented.
Why Newport Beach Homes Are Different
Newport Beach’s housing stock splits into two distinct categories with almost nothing in common. The Balboa Peninsula and Balboa Island are dense with small-footprint beach cottages from the 1920s through the 1950s, many renovated repeatedly but still carrying original uninsulated wall cavities and crawl spaces that sit feet from harbor water. Access is constrained by zero-lot-line construction and shared walls; crews often enter through floor hatches rather than exterior crawl doors.
The newer custom estates of Newport Coast and Harbor Ridge, built in the 1990s and 2000s to California Title 24 standards, present the opposite problem: insulation exists but may have settled, been compromised by rodent activity, or been installed without proper air sealing. The persistent summer marine layer keeps cooling loads modest, but the year-round salt-laden humidity creates condensation inside walls and attics that fiberglass in older homes cannot manage. In Corona del Mar and the Lido Peninsula, we see the same pattern: homes close enough to the water that vapor drive from exterior to interior is constant, and any air leak becomes a moisture leak.
Our Main Newport Beach Services
These are the three services Newport Beach homeowners request most often, each with its own detailed page.
Attic Insulation in Newport Beach
Attic insulation in Newport Beach addresses the gap between what Title 24 requires and what was actually installed, especially in 1990s-2000s builds where blown-in fiberglass settled or was distributed unevenly. In older peninsula and island homes, we’re often starting from zero attic coverage. We air seal first, then insulate, and we publish blower-door readings so you can verify the result. Attic Insulation in Newport Beach covers material options, pricing, and what documentation you’ll receive.
Spray Foam Insulation in Newport Beach
Spray foam insulation is our specified material for below-grade and rim-joist work on Balboa Island, where harbor humidity saturates fiberglass within seasons. Closed-cell spray foam from Demilec or Icynene acts as both insulation and vapor barrier, which matters when tidal water sits feet from your foundation. We use open-cell in above-grade attic applications where moisture management is less critical. Spray Foam Insulation in Newport Beach details when we spec each type and what it costs.
Blown-In Insulation in Newport Beach
Blown-in insulation, typically fiberglass from Owens Corning or cellulose from GreenFiber, is our standard for topping off existing attic coverage in Newport Coast and Harbor Ridge homes where the original R-value has settled below current code. We run a blower-door test before and after to confirm that new insulation isn’t simply trapping conditioned air that’s leaking through an unsealed attic floor. Blown-In Insulation in Newport Beach explains the process and pricing.
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.
Before
AfterCrawl Space Encapsulation & Vapor Barrier in Newport Beach
Crawl space encapsulation and vapor barrier installation in Newport Beach is fundamentally about stopping moisture, not saving on energy bills. On Balboa Island, where homes are built lot-line to lot-line and tidal harbor water sits feet from foundations, unprotected crawl spaces develop chronic condensation that fiberglass cannot survive. We specify Crawl Space Encapsulation & Vapor Barrier systems that include full ground coverage, sealed seams, and conditioned-air supply when code requires it.
In Corona del Mar and the Lido Peninsula, we see the same pattern: older homes with dirt-floor crawl spaces and no vapor barrier, where relative humidity stays above 70% year-round. The salt air accelerates corrosion on HVAC ducts and framing hardware, so encapsulation here protects structural elements as much as it controls indoor air quality.
Crawl Space Vapor Barrier
Signs you need it
Your crawl space has standing water after winter storms, white efflorescence on block walls, or a musty smell that enters the living space through floor gaps.
What it costs in Newport Beach
A 6-mil to 20-mil vapor barrier covering dirt-floor crawl spaces in Newport Beach typically runs $3,800-$5,200 for homes under 2,000 square feet.
How we do it
We remove debris, grade the soil for drainage, lay overlapping polyethylene sheeting with sealed seams, and secure it to foundation walls with mechanical fasteners and mastic.
Crawl Space Encapsulation
Signs you need it
You’re experiencing mold recurrence after remediation, rusted HVAC ducts, or floor insulation that sags and drips with condensed moisture.
What it costs in Newport Beach
Full encapsulation with sealed vapor barrier, insulated walls, and dehumidification in Newport Beach crawl spaces typically ranges from $6,500-$11,000.
How we do it
We install a reinforced vapor barrier across floors and up walls, seal all seams and penetrations with tape and mastic, insulate rim joists with closed-cell spray foam, and add a dedicated dehumidifier with condensate pump.
What Crawl Space Encapsulation & Vapor Barrier Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Vapor barrier (dirt floor, 6-20 mil) | $3,800 - $5,200 |
| Full encapsulation with dehumidifier | $6,500 - $11,000 |
| Rim joist spray foam (closed-cell) | $1,800 - $3,400 |
How long does crawl space encapsulation take in Newport Beach?
Most vapor barrier installations finish in one day; full encapsulation with dehumidification takes two to three days. We coordinate access for zero-lot-line properties on Balboa Island through interior floor hatches when exterior entry isn’t available. Call (949) 403-8361 for a written scope and price before we start.
Will encapsulation stop mold in my Newport Beach crawl space?
Encapsulation stops the moisture that feeds mold, but active mold requires remediation first. We document pre-existing conditions with photos and recommend remediation contractors when needed; our 365-Day Done Right Promise covers the encapsulation work only. Call (949) 403-8361 for an assessment.
Radiant Barrier Installation in Newport Beach
Radiant barrier installation in Newport Beach addresses a specific problem: attics that heat up despite mild ambient temperatures, because dark roofing materials absorb solar radiation and radiate it downward. In Newport Coast and Harbor Ridge, where large custom homes with complex rooflines create attic spaces that function as solar ovens, radiant barriers reduce cooling load without adding insulation depth that existing framing can’t accommodate. We install Radiant Barrier Installation systems that reflect radiant heat rather than absorb it.
The marine layer keeps outdoor temperatures moderate, but direct sun on dark composite shingles or tile roofs can push attic temperatures above 140°F. In these conditions, radiant barrier foil on the roof deck or across rafters blocks heat transfer into conditioned space below, which matters more for comfort than for energy savings in this climate.
Attic Radiant Barrier
Signs you need it
Your second floor stays uncomfortably warm despite running the AC, or your attic insulation feels hot to the touch on sunny afternoons.
What it costs in Newport Beach
Attic radiant barrier installation in Newport Beach typically runs $2,200-$4,500 depending on attic square footage and accessibility.
How we do it
We staple perforated aluminum foil across attic rafters or lay it over existing insulation, maintaining ventilation channels and avoiding compression that would reduce effectiveness.
Radiant Barrier Roof Deck
Signs you need it
You’re re-roofing a Newport Coast home with dark shingles and want to reduce attic heat gain without changing exterior appearance.
What it costs in Newport Beach
Radiant barrier applied to roof deck during re-roofing in Newport Beach typically adds $1,800-$3,200 to the roofing project.
How we do it
We install reflective sheathing or foil-faced decking during roof replacement, integrating with the roofing contractor’s schedule and verifying with post-installation attic temperature readings.
What Radiant Barrier Installation Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Attic radiant barrier (foil across rafters) | $2,200 - $4,500 |
| Radiant barrier roof deck (during re-roof) | $1,800 - $3,200 |
| Radiant barrier with attic ventilation upgrade | $3,500 - $5,800 |
Does radiant barrier work in Newport Beach’s mild climate?
It reduces attic heat gain on direct-sun days, which improves comfort more than it cuts bills in this climate; we measure effectiveness with attic temperature readings before and after, not energy-savings projections. Call (949) 403-8361 for a free assessment.
Can radiant barrier be added to my existing attic?
Yes, we install perforated foil across rafters or lay it over existing insulation without disturbing current coverage; we air seal first so the barrier doesn’t trap moisture from attic leaks. Call (949) 403-8361 for a written price.
Insulation Removal & Replacement in Newport Beach
Insulation removal and replacement in Newport Beach is most often needed in Balboa Peninsula and Balboa Island cottages where original material, if any, has been compromised by decades of moisture exposure, rodent activity, or multiple renovation cycles. We also remove improperly installed fiberglass from crawl spaces where harbor humidity has saturated the material, creating mold conditions that new insulation alone won’t fix. Our Insulation Removal & Replacement process includes documented photo records of what we find and what we install.
In Newport Coast, we remove insulation that was installed without air sealing, trapping conditioned air leaks inside wall cavities where they condense against cooler exterior sheathing. The replacement spec always includes sealing before insulating, with blower-door verification.
Contaminated Insulation Removal
Signs you need it
Your attic or crawl space insulation smells musty, shows dark staining, or crumbles when touched, indicating moisture damage or rodent contamination.
What it costs in Newport Beach
Contaminated insulation removal in Newport Beach typically runs $2,500-$4,800 for attics under 1,500 square feet, plus disposal fees.
How we do it
We contain the work area, remove material with industrial vacuums, HEPA-filter the space, and document conditions with photos before recommending replacement specs.
Insulation Replacement
Signs you need it
Your home was insulated decades ago with unknown material, or recent work disturbed existing coverage and left gaps.
What it costs in Newport Beach
Insulation replacement with new blown-in fiberglass or cellulose in Newport Beach typically ranges from $3,200-$6,500 depending on attic size and access.
How we do it
We air seal the attic floor or wall cavities, install new material to specified depth and density, and provide blower-door readings and a photo record documenting the completed work.
What Insulation Removal & Replacement Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Contaminated insulation removal (attic) | $2,500 - $4,800 |
| Insulation replacement (blown-in) | $3,200 - $6,500 |
| Removal + replacement package | $5,200 - $9,800 |
Is it cheaper to remove old insulation or install over it?
Installing over contaminated or compressed insulation traps moisture and reduces new material effectiveness; removal is necessary when existing insulation is wet, moldy, or rodent-damaged, and we document why with photos. Call (949) 403-8361 for an inspection and written price.
How long does insulation removal take in Newport Beach?
Most attic removals finish in one day; crawl space removals take longer due to confined access, especially on Balboa Island where entry is through interior hatches. We schedule replacement for the following day when possible. Call (949) 403-8361 to coordinate timing.
Attic Air Sealing in Newport Beach
Attic air sealing in Newport Beach is the prerequisite step we never skip, even when homeowners call for insulation alone. In 1920s-1950s peninsula and island cottages, top plates and electrical penetrations were never sealed during original construction, and decades of renovation have added more holes than anyone tracked. Our Attic Air Sealing work closes these pathways before any insulation goes in, because blowing material over an unsealed attic floor simply traps conditioned air leaks inside the assembly where they condense.
In newer Newport Coast homes, we find can lights, duct boots, and bath fan housings that leak significant conditioned air into vented attics. The blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing - quantifies this before we start and verifies improvement after we finish.
Top Plate & Penetration Sealing
Signs you need it
You feel drafts from outlets on exterior walls, or your blower-door test shows excessive air leakage despite apparent insulation coverage.
What it costs in Newport Beach
Top plate and penetration sealing in Newport Beach attics typically runs $1,800-$3,500 for homes under 3,000 square feet.
How we do it
We seal wall top plates with expanding foam, caulk electrical and plumbing penetrations, and install fire-rated foam around chimney chases, then retest with the blower door.
Can Light & Duct Boot Sealing
Signs you need it
Your recessed can lights are hot in summer or cold in winter, or you see dust streaks around ceiling registers indicating air leakage.
What it costs in Newport Beach
Can light and duct boot sealing in Newport Beach typically ranges from $1,200-$2,800 depending on fixture count and accessibility.
How we do it
We install airtight covers or replace non-IC cans with sealed housings, seal duct boots to drywall with mastic, and verify with smoke pencil and blower-door test.
What Attic Air Sealing Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Top plate & penetration sealing | $1,800 - $3,500 |
| Can light & duct boot sealing | $1,200 - $2,800 |
| Full attic air sealing (comprehensive) | $3,200 - $5,500 |
Can air sealing alone improve comfort in Newport Beach?
Yes, especially in older homes where unsealed top plates and can lights allow conditioned air to escape and humid outside air to enter; we measure improvement with before-and-after blower-door readings. Call (949) 403-8361 for a test and written scope.
Should air sealing happen before or after new insulation?
Always before - we seal first, then insulate, in that order; blowing insulation over unsealed leaks traps moisture and wastes material, which is why Haven Standard requires air sealing completion before insulation installation. Call (949) 403-8361 for a written price.
Wall Insulation in Newport Beach
Wall insulation in Newport Beach presents the hardest access challenge of any service we offer. On Balboa Peninsula and Balboa Island, 1920s-1950s cottages with zero-lot-line construction and shared walls have no exterior access to wall cavities, and interior access means working around historic trim, plaster, and built-in cabinetry that owners want preserved. Our Wall Insulation crews use injection methods that minimize disruption while achieving full cavity fill.
In Corona del Mar and the Lido Peninsula, we encounter homes that were stuccoed over original shiplap siding with no insulation in between, creating walls that conduct sound and moisture between tightly packed neighboring properties. The marine humidity makes uninsulated wall cavities prone to condensation, especially on north-facing exposures that never fully dry.
Injection Foam Wall Insulation
Signs you need it
Your exterior walls are cold to the touch in winter, or you hear every conversation from neighboring homes through shared walls.
What it costs in Newport Beach
Injection foam wall insulation in Newport Beach typically runs $4,500-$8,200 for a 2,000 square foot home, depending on cavity depth and access difficulty.
How we do it
We drill 5/8-inch holes through interior drywall or exterior siding at stud-bay intervals, inject slow-rise foam that fills without bowing walls, and patch with matching materials.
Interior Wall Soundproofing
Signs you need it
You share zero-lot-line walls on Balboa Island and need to reduce sound transmission from adjacent properties or harbor activity.
What it costs in Newport Beach
Interior wall soundproofing with mineral wool and resilient channel in Newport Beach typically ranges from $3,800-$7,500 per wall assembly.
How we do it
We remove existing drywall, install Rockwool or Johns Manville mineral wool batts, add resilient channel to decouple framing, and finish with new drywall and matching texture.
What Wall Insulation Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Injection foam wall insulation | $4,500 - $8,200 |
| Interior wall soundproofing | $3,800 - $7,500 |
| Drill & fill (cellulose, limited access) | $3,200 - $5,800 |
Can you insulate walls without removing drywall in Newport Beach?
Yes, injection foam and dense-pack cellulose both fill cavities through drilled holes that we patch afterward; this is our standard approach for historic Balboa Island cottages where preserving interior finishes matters. Call (949) 403-8361 for access assessment and written price.
Does wall insulation help with sound on Balboa Island?
Mineral wool and dense-fill cellulose both reduce airborne sound transmission through shared walls, which is often the primary reason owners of zero-lot-line properties call; we specify materials by STC rating and document expected performance. Call (949) 403-8361 for a consultation.
Attic Cleaning & Rodent Proofing in Newport Beach
Attic cleaning and rodent proofing in Newport Beach addresses conditions we find in nearly every unsealed peninsula and island attic: rodent activity, contaminated insulation, and entry points created by original construction gaps that were never closed. The mild climate allows roof rats to remain active year-round, and mature trees in Corona del Mar and Harbor Ridge provide continuous highway access to rooflines. Our Attic Cleaning & Rodent Proofing service includes exclusion - sealing entry points - not just removal.
We document everything: photos of contamination before cleanup, photos of sealed entry points, and a written record of what we found and what we did. The 365-Day Done Right Promise covers our exclusion work; if rodents re-enter through points we sealed, we return.
Attic Cleanout & Sanitizing
Signs you need it
You hear scratching in ceilings, find droppings in the attic, or smell urine that enters living spaces through recessed lights and HVAC returns.
What it costs in Newport Beach
Attic cleanout and sanitizing in Newport Beach typically runs $2,800-$5,500 depending on contamination extent and attic square footage.
How we do it
We remove contaminated material, HEPA-vacuum all surfaces, apply enzymatic sanitizer, and document with photos before recommending insulation replacement or air sealing.
Rodent Proofing & Exclusion
Signs you need it
You’ve had repeated rodent activity despite trapping, or you can see gaps around roof junctions, vents, or where utilities enter the structure.
What it costs in Newport Beach
Rodent proofing and exclusion in Newport Beach typically ranges from $1,800-$4,200 for comprehensive sealing of a single-family home.
How we do it
We inspect the roofline and foundation with the customer present, seal all entry points 1/4-inch or larger with steel mesh and sealant, and provide a written map of sealed locations with photos.
What Attic Cleaning & Rodent Proofing Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Attic cleanout & sanitizing | $2,800 - $5,500 |
| Rodent proofing & exclusion | $1,800 - $4,200 |
| Cleanout + exclusion + re-insulation | $5,500 - $11,000 |
How do I know if rodents are in my Newport Beach attic?
Listen for scratching at dawn and dusk, check for droppings near attic hatches, and look for gnaw marks on wiring or HVAC flex duct; we confirm with inspection and document findings with photos. Call (949) 403-8361 for same-week scheduling.
Will rodent proofing keep rats out permanently?
Our exclusion work seals all identified entry points 1/4-inch or larger, and we guarantee it for 365 days; new entry points from structural damage or unaddressed tree contact are separate issues we note during inspection. Call (949) 403-8361 for a written scope and price.
Home Energy Audit in Newport Beach
A home energy audit in Newport Beach produces different priorities than the same audit in inland Orange County. The mild marine climate means heating and cooling loads are small, but the persistent humidity and salt air create moisture problems that standard audits miss if they focus only on thermal performance. Our Home Energy Audit includes blower-door testing, thermal imaging, and specific assessment of vapor drive and condensation risk in harbor-proximate construction.
For Balboa Island and peninsula cottages, we audit with the understanding that these homes were never designed for year-round occupancy; the envelope was built to ventilate freely, and any insulation strategy must account for that original intent. In Newport Coast estates, we audit for the gap between Title 24 compliance and actual performance, which often reveals air sealing omissions from original construction.
Blower Door Test
Signs you need it
You’re considering any insulation work and want to quantify current air leakage before deciding where to spend money.
What it costs in Newport Beach
A standalone blower door test in Newport Beach typically runs $450-$750; it’s included free with any proposed insulation or air sealing project.
How we do it
We install a calibrated fan in an exterior door, depressurize the house to 50 Pascals, and measure CFM50 - the cubic feet per minute of air leakage at standard pressure.
Thermal Imaging Inspection
Signs you need it
You suspect missing insulation, moisture intrusion, or air leaks but can’t locate them visually in finished walls or ceilings.
What it costs in Newport Beach
Thermal imaging inspection in Newport Beach typically ranges from $350-$650 as a standalone service, or bundled with blower-door testing.
How we do it
We scan interior and exterior surfaces with an infrared camera during controlled conditions, interpret thermal patterns to identify insulation gaps, moisture, or air leakage, and annotate images in the written report.
What Home Energy Audit Costs in Newport Beach
| Item | Typical range in Newport Beach |
|---|---|
| Blower door test (standalone) | $450 - $750 |
| Thermal imaging inspection | $350 - $650 |
| Comprehensive home energy audit | $800 - $1,400 |
What does a home energy audit include in Newport Beach?
Our audit includes blower-door test, thermal imaging, insulation inspection, and moisture-risk assessment specific to harbor-proximate homes; you receive a written report with prioritized recommendations and photos. Call (949) 403-8361 to schedule; the audit fee applies to any work you proceed with.
How long does a home energy audit take?
Most comprehensive audits take three to four hours including setup, testing, and walkthrough with the homeowner; we schedule morning slots to capture thermal imaging before afternoon sun loads the roof. Call (949) 403-8361 for availability.
Brands We Service in Newport Beach
We install Owens Corning fiberglass, Johns Manville mineral wool, and GreenFiber cellulose, with spray foam from Demilec and Icynene for closed-cell applications. No proprietary lock-in means we specify by job condition, not by supplier contract. See our brands for full material specifications and warranty terms.
Pricing for Insulation in Newport Beach, CA
| Service | Typical range in Newport Beach |
|---|---|
| Crawl space vapor barrier | $3,800 - $5,200 |
| Full crawl space encapsulation | $6,500 - $11,000 |
| Rim joist spray foam (closed-cell) | $1,800 - $3,400 |
| Attic radiant barrier | $2,200 - $4,500 |
| Radiant barrier roof deck | $1,800 - $3,200 |
| Contaminated insulation removal | $2,500 - $4,800 |
| Insulation replacement (blown-in) | $3,200 - $6,500 |
| Top plate & penetration sealing | $1,800 - $3,500 |
| Can light & duct boot sealing | $1,200 - $2,800 |
| Injection foam wall insulation | $4,500 - $8,200 |
| Attic cleanout & sanitizing | $2,800 - $5,500 |
| Comprehensive home energy audit | $800 - $1,400 |
Prices increase with zero-lot-line access constraints on Balboa Island, historic plaster finishes that require careful patching, and homes with multiple levels of roofline complexity. Every job begins with a written price before any work starts - Haven Standard Clause 1 - and closes with a Documented Photo Record.
Neighborhoods We Serve in Newport Beach
We work across all Newport Beach neighborhoods, with crews dispatched from our Los Angeles office for same-day response to most calls. Access and construction type vary significantly by area, which is why we assess each property individually rather than applying a standard spec.
- Balboa Peninsula & Balboa Island
- Newport Coast & Harbor Ridge
- Corona del Mar
- Lido Peninsula & Lido Isle
- Eastbluff & Dover Shores
Service Area - Cities Near Newport Beach
We serve homeowners throughout coastal Orange County, with regular work in Laguna Woods, CA, Laguna Beach, CA, Irvine, CA, and Laguna Hills, CA. Scheduling and dispatch are coordinated from our Los Angeles office; crews arrive with materials stocked for local conditions, including closed-cell spray foam spec’d for harbor-humidity environments.
Serving Newport Beach, CA - Our Local Coverage Area
We’re based in the Newport Beach 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 Newport Beach
Most attic and wall insulation projects in Newport Beach require a building permit if they involve structural modification or spray foam application; we pull permits as part of our standard process and include the cost in your written price. HOA approval may be required in gated communities like Newport Coast; we provide the documentation package for your submittal.
We answer calls with a live person 24/7 and typically schedule assessments within 48 hours for Newport Beach properties; emergency situations like saturated crawl spaces or active roof leaks get same-day response when possible. Your written price arrives within 24 hours of assessment.
Balboa Island’s harbor-proximate location creates constant vapor drive and salt-air exposure that inland Irvine homes don’t experience; fiberglass below grade fails quickly here, which is why we spec closed-cell spray foam for rim joists and specify moisture barriers that would be unnecessary in drier inland zip codes. The marine microclimate changes the technical requirements completely.
Call (949) 403-8361 for a free estimate. We’ll assess your home, provide a written price before any work starts, and leave you with documented proof of what was done.
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 60-minute.
- 4You approve before work beginsNothing starts until you say go.
What Newport Beach Customers Say
"Fixed price, clean work, and they hauled the old material away as agreed."
- Todd M."They photographed rodent damage in the old insulation that we had no idea about, and priced the exclusion work separately so we could decide."
- Harriet N."They air-sealed the attic floor before insulating and showed me the blower-door number before and after. The upstairs is finally the same temperature as downstairs."
- Marisol D.