Insulation in Acton, CA
Crawl space encapsulation and vapor barrier installation in Acton typically runs $3,200-$7,800 for most rural ranchette and manufactured homes, with full encapsulations on larger crawl spaces reaching the upper end. The high-desert elevation here, with summer days over 100°F and winter nights below freezing, puts a double load on every building envelope system we install. We’re Envelope Insulation Co., and we treat air sealing as a hard prerequisite, not an upsell, on every Acton job we take. Call (661) 526-2890 for a written price before any work starts.
Why Acton Homes Are Different
Acton sits at roughly 2,600-3,000 feet in a high-desert mountain-pass zone between the San Fernando Valley and the Antelope Valley, producing a thermal profile found nowhere in neighboring lower communities: summer days regularly exceed 100°F while winter nights drop below freezing (with occasional snow), meaning insulation here must carry a genuine four-season double load - keeping brutal summer heat out AND retaining heat through legitimately cold winters - rather than the mostly summer-only focus typical of valley-floor LA County cities.
The housing stock is predominantly rural ranchette-style custom builds and a significant concentration of manufactured/modular homes on large parcels, many dating to the 1970s-1990s. Manufactured homes in particular suffer from compressed or fallen belly (floor) insulation and thin wall panels that perform poorly against Acton’s wide temperature swings. The high-desert elevation combined with regular Santa Ana wind events creates powerful pressure differentials that force conditioned air out of attic bypasses and wall penetrations; in this climate, air-sealing details matter as much as raw R-value because gaps that are minor nuisances in mild coastal climates become major energy drains when the outdoor range spans from 15°F to 105°F within the same calendar year. Much of Acton falls within LA County’s designated Very High Fire Hazard Severity Zone, so local building inspectors increasingly require fire-rated overlayment or specific product documentation when spray foam or loose-fill insulation is installed in attics.
Our Main Acton Services
Most Acton homeowners who call us start with attic work or spray foam, though blown-in remains popular for retrofits in older manufactured housing.
Attic Insulation in Acton
Attic insulation in Acton starts with a blower-door test to measure how much conditioned air the home is losing through the ceiling plane. We never blow new insulation over an unsealed attic floor; top plates, can lights, and penetrations get sealed first with documented before-and-after CFM50 readings. For ranchette homes with complex rooflines and manufactured homes with shallow attic cavities, we adjust material selection and installation depth to hit target R-values without compressing the product. Attic Insulation in Acton covers our full process and pricing.
Spray Foam Insulation in Acton
Spray foam insulation in Acton requires extra attention to fire-rated overlayment because of the Very High Fire Hazard Severity Zone designation that covers much of the community. We source open-cell and closed-cell products from Owens Corning, Johns Manville, and Demilec, and we submit product data sheets with every permit package to avoid inspection failures that contractors from lower-elevation LA County communities often don’t anticipate. Every spray foam job gets a written scope, written warranty, and documented photo record before the crew leaves. Spray Foam Insulation in Acton details our approach.
Blown-In Insulation in Acton
Blown-in insulation in Acton works well for retrofitting 1970s-1990s ranchette attics where fiberglass batts have settled or been disturbed by rodent activity. We use loose-fill fiberglass and cellulose from Knauf, GreenFiber, and Owens Corning, installing to proper depth without blocking soffit ventilation. Because Acton’s Santa Ana wind events create strong stack effect pressure, we always air-seal the attic floor before blowing, then verify with a blower-door test. Blown-In Insulation in Acton explains our full method.
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.
Crawl Space Encapsulation & Vapor Barrier in Acton
Crawl space encapsulation and vapor barrier installation in Acton addresses a problem that’s often hidden until the damage is extensive: the combination of cold winter ground temperatures and dry summer heat creates moisture cycling in crawl spaces that standard vented designs can’t manage. Manufactured homes on Acton’s large rural parcels are especially vulnerable because fallen or compressed belly insulation lets ground moisture rise into the floor system, while ranchette custom builds from the 1980s frequently have dirt-floored crawls with no vapor barrier at all. Crawl Space Encapsulation & Vapor Barrier is our full service hub, and every Acton job begins with a written price and ends with a documented photo record.
Crawl Space Vapor Barrier
Signs you need it
Your crawl space has standing water after rain, visible mold on floor joists, or a persistent musty smell that enters the living space through gaps in the subfloor.
What it costs in Acton
A 6-mil to 20-mil vapor barrier installed over bare dirt in a typical Acton crawl space runs $1,800-$3,500 depending on square footage, pier count, and whether we need to grade the floor first.
How we do it
We remove debris, grade and level the dirt floor, seam-seal a reinforced polyethylene sheet at all overlaps, extend it 6-12 inches up pier posts and foundation walls, and seal penetrations with compatible tape.
Crawl Space Encapsulation
Signs you need it
Your HVAC ducts in the crawl are sweating in summer, your floors are cold in winter despite adequate attic insulation, or you’ve had repeated rodent nesting that has compromised the floor insulation.
What it costs in Acton
Full encapsulation with sealed vapor barrier, rigid foam wall insulation, sealed crawl space door, and conditioned air supply typically ranges $5,500-$11,000 for Acton ranchette and manufactured homes with crawl spaces from 800 to 2,500 square feet.
How we do it
We install a complete vapor barrier system, insulate foundation walls with rigid foam, seal all vents and the access door, and introduce a small conditioned air supply to maintain positive pressure and controlled humidity.
What Crawl Space Encapsulation & Vapor Barrier Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Vapor barrier (6-20 mil, dirt floor) | $1,800 - $3,500 |
| Partial encapsulation (barrier + wall foam) | $3,200 - $6,500 |
| Full encapsulation with conditioning | $5,500 - $11,000 |
How long does crawl space encapsulation take in Acton?
Most vapor barrier jobs finish in one day; full encapsulations with wall foam and conditioning typically take two to three days depending on crawl space size and pier count. We schedule around Acton’s weather windows and confirm a start date when we deliver your written price.
Will encapsulation help with cold floors in my manufactured home?
Yes, sealing the crawl and adding wall insulation stops the thermal bypass that makes manufactured home floors cold in Acton winters; we often see homeowner comfort complaints resolve before the heating bill even arrives. Call (661) 526-2890 for a free inspection and written price.
Radiant Barrier Installation in Acton
Radiant barrier installation in Acton is one of the most cost-effective envelope upgrades for homes that face 100°F+ summer days and intense high-desert solar gain. The metal roofs common on Acton ranchettes and the shallow attic cavities in manufactured homes both create conditions where radiant heat transfer dominates, making a reflective barrier more impactful than simply adding more fiberglass in spaces that are already full. Radiant Barrier Installation details our full approach, and every job includes before-and-after documentation.
Attic Radiant Barrier
Signs you need it
Your attic temperature exceeds 140°F on summer afternoons, your AC runs continuously after 2 PM, or you have dark roofing that absorbs and reradiates heat into the living space below.
What it costs in Acton
Attic radiant barrier installation in Acton typically runs $1,400-$2,800 for ranchette homes with accessible attics, with manufactured homes on the lower end due to smaller square footage.
How we do it
We staple perforated radiant barrier foil across rafter bottoms or lay it over existing attic insulation, maintaining ventilation channels and avoiding compression that would reduce the reflective air gap.
Radiant Barrier Roof Deck
Signs you need it
You’re reroofing or have exposed roof decking during repairs, or your attic has limited headroom that makes rafter-bottom installation impractical.
What it costs in Acton
Radiant barrier applied directly to roof deck sheathing during reroof or retrofit runs $2,200-$4,500 in Acton, depending on roof pitch, complexity, and whether we’re working alongside a roofing crew or independently.
How we do it
We apply radiant barrier sheathing or foil-faced decking to the roof deck interior, seal all seams with aluminum tape, and verify that attic ventilation intake and exhaust remain unobstructed.
What Radiant Barrier Installation Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Attic radiant barrier (foil, rafter or floor) | $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 in Acton winters too?
Radiant barrier primarily reduces summer heat gain, but in Acton’s cold winters it also helps retain heat by reducing radiant loss from the attic floor to the cold roof deck when installed as a continuous barrier. We pair it with proper floor insulation and air sealing for year-round performance.
Can you install radiant barrier in a manufactured home attic?
Yes, manufactured home attics in Acton often have limited clearance that favors a laid-over-floor installation rather than rafter-bottom stapling; we measure clearance and truss spacing before recommending the method. Call (661) 526-2890 for a free assessment and written price.
Insulation Removal & Replacement in Acton
Insulation removal and replacement in Acton is frequently necessary in the 1970s-1990s housing stock where original fiberglass has settled, been compromised by rodent activity, or absorbed moisture from undetected roof leaks. The wide temperature swings and Santa Ana wind events accelerate degradation, and we’ve found that many Acton homeowners don’t realize their attic insulation is performing at half its rated R-value until we open the hatch and document what we find. Insulation Removal & Replacement covers our complete process, including safe handling and disposal.
Contaminated Insulation Removal
Signs you need it
Your attic insulation smells of urine, shows rodent droppings throughout, or has visible mold staining that indicates moisture intrusion and biological contamination.
What it costs in Acton
Contaminated insulation removal with HEPA containment, safe disposal, and attic sanitizing in Acton typically runs $2,800-$5,500 depending on attic square footage, contamination depth, and access difficulty.
How we do it
We establish negative air pressure with HEPA filtration, remove contaminated material in sealed bags, apply an enzyme-based sanitizer to affected surfaces, and provide a documented photo record before any new insulation is installed.
Insulation Replacement
Signs you need it
Your original insulation has compressed below half its original thickness, you’re experiencing temperature stratification between rooms, or your energy bills have risen without rate increases.
What it costs in Acton
Insulation replacement with new fiberglass or cellulose in a typical Acton ranchette attic runs $2,200-$4,800, with manufactured homes on the lower end and larger custom builds reaching the upper range.
How we do it
We remove old material, inspect and repair any air leaks or roof deck damage, seal the attic floor with foam and caulk at all penetrations, then install new insulation to full design depth with verified coverage.
What Insulation Removal & Replacement Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Contaminated insulation removal + sanitizing | $2,800 - $5,500 |
| Standard insulation removal (non-contaminated) | $1,200 - $2,400 |
| Insulation replacement (new material + install) | $2,200 - $4,800 |
Do I have to leave during insulation removal?
No, our HEPA containment and negative air machines keep the living space isolated, though we recommend sensitive individuals stay elsewhere during the removal phase as a precaution. We provide a written scope and completion checklist so you know exactly what was removed and what replaced it.
How do I know if my insulation is contaminated?
Dark streaking, compacted tunnels, or a sharp ammonia smell are clear indicators; we offer a free inspection with documented photos so you can see the condition without crawling up yourself. Call (661) 526-2890 to schedule.
Attic Air Sealing in Acton
Attic air sealing in Acton is the single most important step we perform before adding any insulation, because the Santa Ana wind events and extreme temperature differentials at 2,600-3,000 feet elevation turn minor ceiling penetrations into major conditioned air losses. We’ve measured blower-door readings in Acton homes that dropped by 40% after sealing alone, before any insulation was added, which is why we treat air sealing as a hard prerequisite under The Haven Standard. Attic Air Sealing explains our full methodology, and every job publishes before-and-after blower-door numbers.
Top Plate & Penetration Sealing
Signs you need it
Your ceiling has visible gaps where walls meet the attic floor, you feel drafts at electrical outlets on exterior walls, or your blower-door test shows excessive leakage at the ceiling plane.
What it costs in Acton
Top plate and penetration sealing in a typical Acton ranchette attic runs $1,800-$3,200, with manufactured homes on the lower end due to smaller footprint and simpler framing.
How we do it
We locate all top plates, wire penetrations, and plumbing stacks with blower-door-guided smoke testing, seal with fire-rated foam and caulk, and verify the reduction with a second blower-door test.
Can Light & Duct Boot Sealing
Signs you need it
You have recessed can lights in ceilings below the attic, your HVAC ducts show dust accumulation at attic connections, or rooms farthest from the air handler never reach set temperature.
What it costs in Acton
Can light sealing with fire-rated covers and duct boot sealing with mastic and mesh tape typically runs $1,400-$2,800 in Acton, depending on fixture count and duct configuration.
How we do it
We install fire-rated enclosures over IC and non-IC can lights, seal duct boots with fiberglass mesh and mastic, and pressure-test the duct system where accessible to confirm no remaining leakage.
What Attic Air Sealing Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Top plate & penetration sealing | $1,800 - $3,200 |
| Can light & duct boot sealing | $1,400 - $2,800 |
| Full attic air sealing package | $2,800 - $5,500 |
Can air sealing alone reduce my energy bills?
Yes, we’ve documented 15-30% heating and cooling load reductions in Acton homes from air sealing alone, because stopping conditioned air loss reduces how hard your system works in both summer and winter extremes. The blower-door numbers we provide let you verify the improvement directly.
How long does attic air sealing take?
Most Acton attic air sealing jobs complete in one day for ranchettes under 3,000 square feet, with larger custom homes or those with extensive can light retrofits taking a second day. We deliver your written price before scheduling and text you when the technician is en route.
Wall Insulation in Acton
Wall insulation in Acton addresses a weak point that’s especially common in 1970s-1990s manufactured and modular homes: thin wall cavities with minimal or compressed fiberglass that can’t handle the 15°F to 105°F annual temperature range. Ranchette custom builds from the same era often have 2×4 walls with R-11 batts that have settled or were never fully inserted at electrical and plumbing rough-ins, creating thermal bypasses that blower-door testing reveals but visual inspection misses. Wall Insulation covers our full retrofit approach, and we never drill a hole without a written scope and price first.
Injection Foam Wall Insulation
Signs you need it
Your exterior walls feel cold to the touch in winter, you have rooms that are consistently 5-10 degrees different from the thermostat setting, or your home was built before 1990 with empty or settled wall cavities.
What it costs in Acton
Injection foam wall insulation for a typical 1,500-2,500 square foot Acton home runs $4,500-$8,500, with manufactured homes on the lower end and multi-story ranchettes at the upper range due to wall height and access complexity.
How we do it
We drill 5/8-inch holes at stud-bay intervals, inject slow-rise foam that fills around existing wiring and plumbing without bowing drywall, then plug and texture-match the holes.
Drill & Fill Wall Insulation
Signs you need it
You need a more economical wall retrofit than injection foam, your walls have some existing insulation that just needs supplemental density, or you’re preparing a rental property for energy compliance.
What it costs in Acton
Drill and fill with dense-pack cellulose in Acton typically runs $3,200-$6,500 for the same footprint, offering a lower-cost alternative with strong air-sealing side benefits from the dense-pack technique.
How we do it
We remove exterior siding or interior drywall at strategic points, dense-pack cellulose to 3.5 pounds per cubic foot to prevent settling, and restore finishes with documented photo records of cavity fill quality.
What Wall Insulation Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Injection foam wall insulation | $4,500 - $8,500 |
| Drill & fill dense-pack cellulose | $3,200 - $6,500 |
| Exterior wall insulation (siding-off retrofit) | $6,500 - $12,000 |
Will injection foam damage my walls?
No, we use slow-rise formulations specifically designed for retrofit cavities, and we verify bay volume before injection to prevent overpressure; in 9,000+ homes since 2016, we’ve had zero drywall blowouts from proper technique. Your written scope specifies the foam type and expected density before we start.
Can you insulate walls in a manufactured home?
Yes, manufactured homes in Acton often have accessible belly cavities and wall chases that allow injection from below or through interior panel seams, though we assess frame type and existing insulation condition before recommending the method. Call (661) 526-2890 for a free evaluation and written price.
Attic Cleaning & Rodent Proofing in Acton
Attic cleaning and rodent proofing in Acton is a frequent need in the rural ranchette and manufactured home stock where roof rats, ground squirrels, and mice use utility lines and tree branches to access attic spaces. The large parcels and natural vegetation that make Acton desirable also support rodent populations, and we’ve found that 1970s-1990s construction often has unsealed eave gaps, uncapped plumbing vents, and deteriorated roof jacks that serve as entry highways. Attic Cleaning & Rodent Proofing details our complete exclusion and restoration process.
Rodent Proofing & Exclusion
Signs you need it
You hear scratching in walls or ceilings at night, find droppings in the attic, or have observed rodents on your roof or utility lines leading to the house.
What it costs in Acton
Rodent proofing and exclusion for a typical Acton ranchette or manufactured home runs $1,800-$3,500, with larger homes or multiple outbuildings reaching the upper end.
How we do it
We identify all entry points with a systematic exterior and interior inspection, seal gaps with rodent-proof materials including steel mesh and concrete, install vent caps, and provide a documented photo record of every sealed location.
Attic Sanitizing & Decontamination
Signs you need it
Your attic has visible rodent droppings, urine-stained insulation, or a persistent odor that enters the living space through ceiling penetrations and HVAC returns.
What it costs in Acton
Attic sanitizing and decontamination after rodent removal in Acton typically runs $2,200-$4,500 depending on contamination extent, attic size, and whether insulation removal is required before treatment.
How we do it
We remove contaminated material with HEPA containment, apply enzyme-based sanitizer to all affected surfaces, fog the attic space with a disinfectant rated for hantavirus and other rodent-borne pathogens, and document with before-and-after photos.
What Attic Cleaning & Rodent Proofing Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Rodent proofing & exclusion | $1,800 - $3,500 |
| Attic sanitizing & decontamination | $2,200 - $4,500 |
| Full attic restoration (cleanout + proofing + re-insulation) | $4,500 - $9,500 |
How do I know rodents are gone before you seal?
We set monitoring traps and verify no activity for a minimum period before sealing entries, because sealing live rodents inside creates a worse problem; our written scope specifies the verification protocol for your property. Call (661) 526-2890 to discuss your situation and get a written price.
Is rodent damage covered by your warranty?
Our 365-Day Done Right Promise covers the quality of our exclusion work, and we guarantee no re-entry through sealed points for one year; new damage from unsealed areas or chew-through of non-metal materials by determined rodents is addressed under our service-call policy with documented response.
Home Energy Audit in Acton
A home energy audit in Acton gives homeowners a documented baseline of exactly where conditioned air is escaping and which envelope improvements will yield the best return in this extreme four-season climate. The combination of high-desert temperature swings, Santa Ana wind pressure differentials, and aging 1970s-1990s construction means that generic retrofit recommendations often miss Acton-specific priorities; our audits use blower-door testing, thermal imaging, and duct leakage measurement to build a prioritized scope tied to actual performance data. Home Energy Audit explains our full diagnostic process, and every audit includes a written report with photos and recommended sequencing.
Blower Door Test
Signs you need it
Your energy bills are higher than comparable homes, you feel drafts despite closed windows, or you’re planning envelope work and want to measure improvement rather than guess at results.
What it costs in Acton
A standalone blower-door test in Acton runs $350-$550, and we credit this toward any air-sealing or insulation work you schedule within 90 days of the test.
How we do it
We install a calibrated fan in an exterior door, depressurize the house to 50 Pascals, measure total leakage in CFM50, and use smoke pencils and infrared cameras to locate the dominant leakage paths for targeted repair.
Thermal Imaging Inspection
Signs you need it
You have rooms that never maintain temperature, suspect missing insulation in walls or vaulted ceilings, or need documentation of envelope condition for a sale or refinance.
What it costs in Acton
Thermal imaging included with a full energy audit runs $450-$750 in Acton, or $300-$450 as a standalone inspection focused on specific problem areas you identify.
How we do it
We scan all exterior surfaces with a FLIR camera during controlled temperature differential conditions, mark thermal anomalies on photos, and correlate findings with blower-door data to distinguish air leakage from insulation gaps.
What Home Energy Audit Costs in Acton
| Item | Typical range in Acton |
|---|---|
| Blower door test (standalone) | $350 - $550 |
| Full energy audit with thermal imaging | $450 - $750 |
| Duct leakage test (included or add-on) | $250 - $450 |
What does a home energy audit include in Acton?
Our full audit includes blower-door testing, thermal imaging, insulation inspection, duct leakage measurement, and a written report with prioritized recommendations and expected cost ranges for each improvement; you leave with documented evidence, not a sales pitch. We schedule audits from our Los Angeles office with crews serving Acton locally.
How long does an energy audit take?
Plan on 2.5 to 4 hours for a typical Acton ranchette or manufactured home, depending on size and complexity; we need access to attic, crawl space, and all rooms, and we perform the work during temperature conditions that make thermal imaging meaningful. Call (661) 526-2890 to schedule and receive your written price confirmation.
Brands We Service in Acton
We source insulation and air-sealing materials from Owens Corning, Johns Manville, Knauf, and Rockwool, with no proprietary product lock-in that limits what’s right for your specific home. Our Acton crews carry common stock for same-day repairs and retrofits, and we order specialty products with documented lead times included in your written scope. See our brands for full specifications.
Pricing for Insulation in Acton, CA
| Service | Typical range in Acton |
|---|---|
| Crawl space vapor barrier | $1,800 - $3,500 |
| Crawl space encapsulation (full) | $5,500 - $11,000 |
| Attic radiant barrier | $1,400 - $2,800 |
| Radiant barrier roof deck | $2,200 - $4,500 |
| Contaminated insulation removal | $2,800 - $5,500 |
| Insulation replacement | $2,200 - $4,800 |
| Attic air sealing (top plate & penetrations) | $1,800 - $3,200 |
| Can light & duct boot sealing | $1,400 - $2,800 |
| Injection foam wall insulation | $4,500 - $8,500 |
| Drill & fill dense-pack cellulose | $3,200 - $6,500 |
| Rodent proofing & exclusion | $1,800 - $3,500 |
| Home energy audit (full) | $450 - $750 |
Prices in Acton trend toward the upper end of these ranges for larger ranchette homes on multi-acre parcels with extended utility runs and complex rooflines, and toward the lower end for manufactured homes with simpler footprints. Every job gets a flat written price before any work starts under Haven Standard Clause 1, with no surprises after the crew arrives.
Neighborhoods We Serve in Acton
We serve all of Acton and the surrounding unincorporated areas, with crews dispatched from our Los Angeles office for scheduled appointments and emergency calls. Most Acton properties receive same-day or next-day response depending on current workload and your flexibility.
- Acton
- Seminole Hot Springs
- Ravenna
- Mount Gleason area
- Aliso Canyon
Service Area - Cities Near Acton
Envelope Insulation Co. serves the full Antelope Valley and northern Los Angeles County corridor, with regular work in Palmdale, CA, Littlerock, CA, Lancaster, CA, and Santa Clarita, CA. Our crews understand the elevation and climate differences between these communities and adjust materials and methods accordingly.
Serving Acton, CA - Our Local Coverage Area
We’re based in the Acton 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 Acton
Most attic and wall insulation retrofits in Acton require a Los Angeles County building permit, and work in the Very High Fire Hazard Severity Zone must include fire-rated product documentation that we prepare and submit as part of our standard process. We handle permit applications and inspections on every job, with no additional fee beyond the permit cost itself.
We answer calls with a live person 24/7, and we typically schedule Acton assessments within 24-48 hours; emergency situations like failed insulation after a roof leak or rodent contamination get prioritized same-day when possible. Your written price arrives within 24 hours of the site visit.
Yes, manufactured and modular homes represent a significant portion of our Acton work; we understand the unique framing, belly insulation, and ventilation requirements of these structures and adapt our methods rather than applying site-built techniques blindly. Every manufactured home job gets the same written scope, documented photos, and blower-door verification as our custom build work.
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 same-day.
- 4You approve before work beginsNothing starts until you say go.
What Acton Customers Say
"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."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."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.