Insulation in Claremont, CA
Crawl space encapsulation and vapor barrier work in Claremont runs $3,200-$6,800 for most homes, with full encapsulations pushing toward the upper end when mold remediation or structural repairs are needed. We’re Envelope Insulation Co., and we treat air sealing as a hard prerequisite before any insulation goes in - a sequencing decision that matters especially in Claremont, where 1920s-1940s homes near the Colleges sit on vented crawl spaces that have been breathing unconditioned air for a century, and where foothills properties deal with moisture patterns coastal crews rarely see. If your floors are cold in January or your crawl space smells like concrete after rain, call (562) 242-7569 and we’ll bring a written price before anyone lifts a tool.
Why Claremont Homes Are Different
Claremont stacks two distinct housing markets into one small city. North of Baseline Road, neighborhoods abutting Thompson Creek, Webb Canyon, and the wilderness park boundary fall within California’s Very High Fire Hazard Severity Zone, so attic and wall retrofits must meet WUI fire-rating requirements that don’t apply in La Verne or Pomona. That means specific assembly ratings, documented ignition barriers, and inspections that slow the job down but can’t be skipped.
Meanwhile, the dense corridor of pre-1950 craftsman bungalows and Spanish Colonial Revival homes clustered near the Claremont Colleges village carry essentially zero original wall insulation. South of the Foothill Freeway, 1950s-1970s tract homes typically hold minimal fiberglass batts that have compressed or degraded after decades of dry inland heat exceeding 100-108°F. The mountain proximity creates 35-50°F diurnal swings, so the same structure needs to block afternoon heat and retain it overnight. That extreme thermal cycling degrades older materials faster and makes continuous-air-barrier systems especially cost-effective here. Crews also routinely discover unpermitted additions near the college rental market - garage conversions finished with non-fire-rated foam or plain cellulose that must be remediated when the work is finally pulled to permit.
Our Main Claremont Services
These are the two services Claremont homeowners call about most, plus the third that solves the specific problems this housing stock creates.
Attic Insulation in Claremont
Attic insulation in Claremont typically means addressing decades of compressed batts in south-side tracts or fire-rated retrofits in foothills homes where WUI compliance is mandatory. We start with a blower-door test to measure air leakage, seal every penetration, then install to the specified R-value with documented before-and-after numbers. Attic Insulation in Claremont covers full-scope jobs from initial test to final photo record.
Spray Foam Insulation in Claremont
Spray foam in Claremont requires careful product selection - Icynene and Demilec open-cell formulations work for conditioned attics, but foothills properties in the VHFHSZ need ignition-barrier-rated assemblies that standard open-cell doesn’t provide. We specify the product to the code requirement, not the other way around. Spray Foam Insulation in Claremont details our specification process and WUI-compliant options.
Blown-In Insulation in Claremont
Blown-in cellulose and fiberglass dominate Claremont’s attic retrofits because they fill irregular joist bays in pre-1950 homes and can be dense-packed into wall cavities without full demolition. We source from Owens Corning and GreenFiber, and we never blow over an unsealed attic floor - that’s Haven Standard sequencing. Blown-In Insulation in Claremont explains our prep-and-install protocol.
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 Claremont
Crawl space encapsulation in Claremont addresses a specific regional problem: vented crawl spaces in the older housing stock near the Colleges that were designed for Pasadena’s milder climate, not Claremont’s 100°F-plus summers and winter nights below 40°F. Those temperature swings drive condensation against floor joists, and the clay-heavy soils in foothills neighborhoods hold moisture longer than the sandy loam found closer to the 10 Freeway. Crawl Space Encapsulation & Vapor Barrier is our full-scope service for homeowners dealing with musty floors, sagging insulation, or visible mold on joists.
Crawl Space Vapor Barrier
Signs you need it
Your crawl space has standing water after rain, vapor barrier plastic is torn or missing entirely, or floor insulation is sagging and water-stained.
What it costs in Claremont
A 6-mil to 20-mil vapor barrier installation for a typical Claremont crawl space runs $1,800-$3,400, with thicker mil ratings and larger footprints pushing toward the higher end.
How we do it
We remove degraded material, grade the soil for drainage, seam-seal polyethylene sheeting at every overlap, and terminate it against piers and foundation walls with mechanical fastening.
Crawl Space Encapsulation
Signs you need it
You’re running a dehumidifier in the crawl space continuously, hardwood floors are cupping from below, or pest inspectors have flagged chronic moisture as a structural concern.
What it costs in Claremont
Full encapsulation with sealed vapor barrier, closed-cell spray foam on walls, and mechanical dehumidification for a Claremont crawl space typically ranges $4,500-$8,200 depending on square footage and existing damage.
How we do it
We seal all vents, install perimeter drainage matting, apply closed-cell foam to foundation walls, hang a sealed vapor barrier across the floor and up walls, and install a condensate-pumped dehumidifier with a dedicated outlet.
What Crawl Space Encapsulation & Vapor Barrier Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Vapor barrier (6-20 mil, install only) | $1,800 - $3,400 |
| Full encapsulation with dehumidifier | $4,500 - $8,200 |
| Crawl space insulation (floor or wall) | $2,200 - $4,800 |
Does Claremont’s clay soil make crawl spaces wetter than other cities?
Yes - foothills neighborhoods above Baseline Road have higher clay content that retains moisture longer, so vapor barriers here need thicker mil ratings and more careful seam sealing than in sandier Inland Valley soils. Call (562) 242-7569 for a free crawl space assessment with written pricing.
Can you encapsulate a crawl space with a furnace down there?
Yes, but combustion appliances require sealed combustion or exterior air intake per California Title 24; we document the appliance type before quoting and coordinate with your HVAC technician if needed. Call (562) 242-7569 to schedule an inspection.
Radiant Barrier Installation in Claremont
Radiant barrier installation in Claremont pays back faster than in almost any LA County city because summer attic temperatures here routinely exceed 150°F, and Santa Ana wind events can spike them further. The 1950s-1970s tract homes south of the Foothill Freeway were built with minimal ceiling insulation and no radiant protection, while the pre-1950 homes near the Colleges have unvented roof assemblies that turn attics into solar ovens. A properly installed radiant barrier can reduce ceiling heat gain by 20-35% in this climate, which matters when you’re cycling between 108°F afternoons and 65°F evenings. Radiant Barrier Installation covers our full specification and installation protocol.
Attic Radiant Barrier
Signs you need it
Your upstairs rooms are 10-15°F hotter than downstairs, your AC runs continuously after 2 PM, or ceiling drywall in top-floor rooms is warm to the touch in August.
What it costs in Claremont
Attic radiant barrier installation for a typical 1,800-2,400 square foot Claremont home runs $1,400-$2,800, with steep-pitch roofs or limited attic access adding labor.
How we do it
We staple perforated aluminum foil across bottom chords of roof trusses, maintaining the required air gap above the barrier, and we air-seal the attic floor first so the barrier isn’t fighting conditioned air loss.
Radiant Barrier Roof Deck
Signs you need it
You’re re-roofing a Claremont home with unvented attic space, or your existing shingles are failing prematurely from excessive attic heat.
What it costs in Claremont
Radiant barrier roof deck application during re-roofing or as a standalone retrofit runs $2,200-$4,500 in Claremont, depending on roof complexity and whether we’re working from inside or removing sheathing.
How we do it
We apply radiant barrier sheathing or foil-faced decking during re-roof, or spray low-emissivity coating directly to existing roof deck from the attic side, with documented coverage rates and thermal imaging verification.
What Radiant Barrier Installation Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Attic radiant barrier (foil, staple-up) | $1,400 - $2,800 |
| Radiant barrier roof deck application | $2,200 - $4,500 |
| Radiant barrier with attic air sealing package | $2,800 - $5,200 |
Does radiant barrier work with existing insulation?
Yes - it works best when paired with adequate attic insulation, but the barrier itself addresses a different heat transfer mechanism (radiant, not conductive) and can be retrofit without disturbing existing batts. Call (562) 242-7569 for a thermal imaging assessment.
Will radiant barrier help my second-floor bedrooms?
In Claremont’s climate, yes - we typically measure 8-12°F reduction in ceiling surface temperature after installation, which directly affects rooms directly below the roofline. Call (562) 242-7569 for a free estimate with written pricing.
Insulation Removal & Replacement in Claremont
Insulation removal and replacement in Claremont is often triggered by two conditions we see repeatedly: pre-1950 homes near the Colleges with original rock wool or vermiculite that has settled to R-3 or below, and foothills properties where unpermitted additions used non-fire-rated materials that must be remediated for WUI compliance. The extreme thermal cycling here - 35-50°F daily swings - accelerates degradation of older fiberglass and can turn compressed batts into moisture traps when attic ventilation is marginal. Insulation Removal & Replacement covers safe extraction, disposal, and code-compliant replacement.
Contaminated Insulation Removal
Signs you need it
Your attic insulation smells musty or urine-like, you’ve had rodent activity confirmed by pest control, or visible mold is growing on insulation surfaces.
What it costs in Claremont
Contaminated insulation removal with HEPA containment, bagging, and proper disposal for a typical Claremont attic runs $2,400-$4,800, with severe contamination or limited access pushing higher.
How we do it
We establish negative air pressure with HEPA filtration, remove contaminated material in sealed bags, apply EPA-registered sanitizer to substrate, and document the clean surface with photos before any new insulation is specified.
Vermiculite & Old Insulation Removal
Signs you need it
You have gray-brown pebbly insulation that may be vermiculite, your home was built 1920-1980 and never had insulation upgraded, or you’re preparing for a permitted addition and the inspector flagged existing material.
What it costs in Claremont
Vermiculite removal with asbestos testing, abatement coordination if positive, and safe disposal runs $4,500-$9,500 in Claremont, with testing required before we quote because not all vermiculite contains asbestos.
How we do it
We collect samples for certified lab analysis, coordinate with licensed abatement contractors if asbestos is present, or proceed with standard removal if negative, with chain-of-custody documentation throughout.
What Insulation Removal & Replacement Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Standard attic insulation removal | $1,800 - $3,600 |
| Contaminated insulation removal | $2,400 - $4,800 |
| Vermiculite removal with testing | $4,500 - $9,500 |
Do I need to leave my house during insulation removal?
For standard fiberglass removal, no - we establish containment and negative pressure so you can remain; for vermiculite pending asbestos results, we may recommend temporary relocation as a precaution. Call (562) 242-7569 and we’ll specify the protocol in your written scope.
Can you remove insulation from walls without tearing out drywall?
In most Claremont homes built before 1950, no - walls were never insulated, so there’s nothing to remove; for 1950s-1970s homes with degraded batts, we use extraction tubes through small exterior holes if the cavity allows. Call (562) 242-7569 for a wall cavity inspection.
Attic Air Sealing in Claremont
Attic air sealing in Claremont is the single highest-ROI improvement for most homes we see, because the pre-1950 bungalows near the Colleges have balloon framing and no top-plate sealing, while the mid-century tracts south of the 210 have recessed can lights and duct boots that leak conditioned air directly into vented attics. Claremont’s extreme temperature differentials - 108°F attic air against 75°F conditioned space - magnify every leak. We never install insulation over an unsealed attic floor; the blower-door test comes first, sealing second, insulation third. Attic Air Sealing details our testing and sealing protocol.
Top Plate & Penetration Sealing
Signs you need it
You feel drafts from outlet boxes on exterior walls, your blower-door test shows excessive leakage at the attic floor plane, or insulation is blackened near framing members from filtering dirty air.
What it costs in Claremont
Top plate and penetration sealing for a typical Claremont home runs $1,600-$3,200, with balloon-framed pre-1950 homes requiring more extensive work at the wall-to-attic junction.
How we do it
We seal all top plate gaps with fire-rated caulk or foam, box out electrical penetrations with rigid foam and sealant, and address plumbing vent stacks with proper flashing and gasketed collars.
Can Light & Duct Boot Sealing
Signs you need it
You see insulation debris around recessed light housings, your HVAC ducts show dust accumulation on exterior surfaces, or rooms farthest from the air handler are consistently under-conditioned.
What it costs in Claremont
Can light sealing with approved covers and duct boot sealing with mastic and mechanical fasteners runs $800-$2,400 in Claremont, depending on fixture count and duct configuration.
How we do it
We install fire-rated airtight covers over IC and non-IC can lights, seal duct boots with fiber-reinforced mastic, and verify with blower-door subtraction testing to quantify the improvement.
What Attic Air Sealing Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Top plate and penetration sealing | $1,600 - $3,200 |
| Can light and duct boot sealing | $800 - $2,400 |
| Full attic air sealing package | $2,400 - $5,000 |
How much does attic air sealing lower my energy bills?
Most Claremont homes we seal show 15-25% reduction in heating and cooling load, with older pre-1950 homes at the higher end; we document the before-and-after blower-door number so you can verify the change. Call (562) 242-7569 for a free estimate.
Can you air seal without adding insulation?
Yes - air sealing is a standalone service under Haven Standard, and we often recommend doing it first, then measuring comfort improvement before deciding on additional insulation. Call (562) 242-7569 to schedule a blower-door test.
Wall Insulation in Claremont
Wall insulation in Claremont means full-cavity retrofits for the craftsman bungalows and Spanish Colonial Revival homes near the Colleges that were built with empty stud bays, and dense-pack upgrades for 1950s-1970s tracts where original batts have compressed to half their labeled R-value. The WUI fire-rating requirements in northern Claremont neighborhoods add a specification layer that standard Inland Valley contractors often miss - certain assemblies require ignition barriers or specific flame-spread ratings that affect product selection. We specify to the code zone, not to a one-size-fits-all product sheet. Wall Insulation covers our full retrofit and new-construction wall services.
Drill & Fill Wall Insulation
Signs you need it
Your exterior walls are cold to the touch in January, you’ve confirmed empty cavities with a thermal camera, or you’re renovating and finding uninsulated stud bays behind plaster.
What it costs in Claremont
Drill-and-fill cellulose or fiberglass for a typical 1,200-1,800 square foot Claremont home runs $2,800-$5,500, with stucco exteriors requiring more careful patching than wood siding.
How we do it
We drill 2-inch holes at stud-bay spacing, dense-pack cellulose or fiberglass to 3.5 pounds per cubic foot, plug with matching material, and finish with texture-matched patching.
Injection Foam Wall Insulation
Signs you need it
You need higher R-value in limited cavity depth, have irregular framing that dense-pack can’t fill completely, or are insulating a foothills home where WUI compliance requires specific fire-rated assemblies.
What it costs in Claremont
Injection foam for a typical Claremont home runs $4,500-$8,500, with open-cell and closed-cell options priced separately and WUI-rated formulations specified where required.
How we do it
We access cavities through interior or exterior, inject expanding foam to full fill, trim excess after cure, and verify density and coverage with thermal imaging before closing.
What Wall Insulation Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Drill-and-fill cellulose/fiberglass | $2,800 - $5,500 |
| Injection foam (open or closed cell) | $4,500 - $8,500 |
| Exterior wall insulation with WUI rating | $5,500 - $10,500 |
Can you insulate walls without removing drywall?
Yes - drill-and-fill and injection foam both access cavities through small holes that we patch and texture-match; the only exception is lath-and-plaster in some 1920s homes, which may require more extensive repair. Call (562) 242-7569 for a wall assessment.
Do I need a permit for wall insulation in Claremont?
Exterior wall insulation typically requires a permit in Claremont; interior walls generally do not unless you’re altering fire-rated assemblies; we pull permits as needed and include the cost in your written price. Call (562) 242-7569 to confirm requirements for your specific project.
Attic Cleaning & Rodent Proofing in Claremont
Attic cleaning and rodent proofing in Claremont is frequently needed in the pre-1950 homes near the Colleges, where original lath-and-plaster ceilings have settled gaps at top plates and where mature tree canopies provide roof access for squirrels and roof rats. The dry inland climate preserves rodent waste longer than coastal humidity, and compressed old insulation creates nesting habitat that newer materials don’t. We clean, sanitize, proof, and document - in that order - with a photo record showing the sealed entry points and the restored attic condition. Attic Cleaning & Rodent Proofing covers our full protocol.
Attic Sanitizing & Decontamination
Signs you need it
Your attic smells of ammonia or organic decay, you’ve found droppings or nesting material during inspection, or a pest control company has recommended cleanup before reinsulation.
What it costs in Claremont
Attic sanitizing and decontamination with HEPA vacuuming, enzyme treatment, and EPA-registered disinfectant runs $1,800-$3,600 for a typical Claremont attic, with heavy contamination or limited access adding labor.
How we do it
We remove contaminated insulation if present, HEPA-vacuum all surfaces, apply enzyme digester to organic waste, fog with hospital-grade disinfectant, and document the clean substrate with dated photos.
Rodent Proofing & Exclusion
Signs you need it
You hear scratching in walls or ceiling at dawn or dusk, you’ve found gnawed vents or soffit damage, or pest control has trapped animals but they keep returning.
What it costs in Claremont
Rodent proofing with metal flashing, hardware cloth, sealant, and one-way exclusion devices for a typical Claremont home runs $1,400-$3,200, with tile roofs requiring more extensive eave and rake sealing than composition shingle.
How we do it
We inspect with the homeowner present when possible, seal all entry points larger than 1/4 inch with rodent-proof materials, install one-way doors over active holes, return to remove doors and verify exclusion, and provide the photo record.
What Attic Cleaning & Rodent Proofing Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Attic sanitizing and decontamination | $1,800 - $3,600 |
| Rodent proofing and exclusion | $1,400 - $3,200 |
| Full attic restoration (clean, proof, reinsulate) | $4,500 - $9,500 |
How do I know if rodents are in my attic right now?
Listen for scratching at dawn and dusk, check for droppings near attic access points, and look for gnawed wiring or compressed insulation trails - we confirm active infestation with a visual inspection before quoting. Call (562) 242-7569 to schedule.
Will rodent proofing keep all animals out permanently?
Our exclusion work carries the 365-Day Done Right Promise - if rodents re-enter through any point we sealed, we return and correct it at no charge; new damage from falling branches or deferred maintenance is not covered. Call (562) 242-7569 for written terms.
Home Energy Audit in Claremont
A home energy audit in Claremont gives you a documented baseline before spending on improvements, and it’s especially valuable here because the city’s two distinct housing markets - pre-1950 uninsulated homes and 1950s-1970s under-insulated tracts - have completely different upgrade priorities. The same blower-door test and thermal imaging that guide our insulation work can show you whether your money is better spent on air sealing, wall insulation, or HVAC right-sizing. We provide the before numbers, the prioritized scope, and the predicted after numbers so you can phase work intelligently. Home Energy Audit details our full diagnostic protocol.
Blower Door Test
Signs you need it
Your energy bills are significantly higher than neighbors with similar homes, you’re planning major insulation work and want a baseline, or rooms are inconsistently conditioned despite a properly sized HVAC system.
What it costs in Claremont
A standalone blower-door test with full report for a typical Claremont home runs $350-$650, or it’s included at no charge when you proceed with recommended work.
How we do it
We install a calibrated fan in an exterior door, depressurize the house to 50 Pascals, measure CFM50 leakage, locate leaks with smoke pencils and infrared, and deliver a written report with prioritized air-sealing targets.
Thermal Imaging Inspection
Signs you need it
You suspect missing insulation in walls or cathedral ceilings, you’ve had ice damming or moisture staining, or you’re verifying contractor work after a previous insulation job.
What it costs in Claremont
Thermal imaging inspection, typically performed with the blower-door test for diagnostic accuracy, runs $250-$500 as a standalone service in Claremont or bundled with the full audit.
How we do it
We scan all building envelope surfaces with a calibrated infrared camera during controlled pressurization, identify thermal bypasses and insulation gaps, and annotate images with location and recommended correction for your records.
What Home Energy Audit Costs in Claremont
| Item | Typical range in Claremont |
|---|---|
| Blower-door test with written report | $350 - $650 |
| Thermal imaging inspection | $250 - $500 |
| Full home energy audit (all diagnostics) | $550 - $950 |
Will an energy audit tell me exactly what to fix first?
Yes - our report ranks improvements by cost-effectiveness and comfort impact, so you can phase work by budget or tackle everything at once; we never recommend work that doesn’t pay back in this climate. Call (562) 242-7569 to schedule.
How long does a home energy audit take?
Plan on 2.5 to 4 hours for a typical Claremont home, longer for larger footprints or when we need to access crawl spaces and multiple attic hatches; you receive the written report within 48 hours. Call (562) 242-7569 to book.
Brands We Service in Claremont
We stock and install materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary lock-in means we specify to your home’s requirements, not to a single supplier’s product line. Most common batts, blown-in, and spray foam formulations are available within 48 hours through our Los Angeles office. our brands
Pricing for Insulation in Claremont, CA
| Service | Typical range in Claremont |
|---|---|
| Vapor barrier (6-20 mil) | $1,800 - $3,400 |
| Full crawl space encapsulation | $4,500 - $8,200 |
| Crawl space insulation | $2,200 - $4,800 |
| Attic radiant barrier | $1,400 - $2,800 |
| Radiant barrier roof deck | $2,200 - $4,500 |
| Standard insulation removal | $1,800 - $3,600 |
| Contaminated insulation removal | $2,400 - $4,800 |
| Vermiculite removal with testing | $4,500 - $9,500 |
| Attic air sealing (full package) | $2,400 - $5,000 |
| Drill-and-fill wall insulation | $2,800 - $5,500 |
| Injection foam wall insulation | $4,500 - $8,500 |
| Full home energy audit | $550 - $950 |
Prices in Claremont push higher when we encounter unpermitted additions that must be brought to code, WUI fire-rated assemblies in foothills zones, or vermiculite requiring abatement coordination. Every job still begins with a written price before any work starts - Haven Standard Clause 1 - and we offer a Free Second Opinion on any written estimate you’ve already received.
Neighborhoods We Serve in Claremont
We work throughout Claremont’s full footprint, from the VHFHSZ foothills properties to the college-adjacent historic core. Most appointments are scheduled within 48 hours, with emergency response available for water intrusion or active rodent issues.
- Claremont Village and College Heights
- Thompson Creek and Webb Canyon foothills
- North Claremont (north of Baseline Road)
- South Claremont and Claraboya
- Padua Hills and adjacent canyon properties
Service Area - Cities Near Claremont
Dispatch and scheduling are coordinated from our Los Angeles office, with crews serving Claremont locally and neighboring communities on regular routes. We also work in La Verne, CA, Pomona, CA, San Dimas, CA, and Glendora, CA - all within the same San Gabriel Valley climate zone with similar housing stock and code requirements.
Serving Claremont, CA - Our Local Coverage Area
We’re based in the Claremont 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 Claremont
Attic insulation replacement typically does not require a permit in Claremont if you’re not altering structure or electrical; additions, wall insulation, and any WUI-zone work generally do. We pull permits as required and include the cost in your written price - no surprises.
We schedule most inspections within 48 hours, and our live person answers calls 24/7 so you can book by phone or text. Emergency water intrusion or active pest issues get same-day or next-day priority.
Yes - we provide the written scope, product data sheets, and photo documentation that HOA architectural committees typically require, and we’ve worked with several Claremont associations on WUI-compliant exterior assemblies. Call (562) 242-7569 to discuss your HOA’s specific submission requirements.
Ready to get a written price before any work starts? Call (562) 242-7569 for a free estimate on insulation in Claremont. We’ll bring a blower door, a thermal camera, and a flat price - no callbacks, no upsell sequencing, no exceptions.
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 Claremont 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."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."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.