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Serving Reno, NV and surrounding areas(775) 491-3183
Older homes in Reno were built decades before anyone cared about R-values. You can bring attics, walls, and crawlspaces up to Climate Zone 5 standards without gutting drywall, remodeling, or moving out. Blown-in attic upgrades, dense-pack wall injection, and targeted spray foam deliver R-49 to R-60 performance where it matters most, cutting heating bills in a climate that demands 6,000 heating degree days every year.
Retrofit insulation in Reno brings existing homes up to R-49 to R-60 attic standards and R-20 wall performance by adding insulation to enclosed spaces without demolition — most single-application projects are complete in one day, and the work qualifies for both NV Energy rebates and the federal 25C tax credit.
The defining challenge of retrofit work is that wall cavities are closed and attics already contain some level of old insulation. Blown-in cellulose or fiberglass is added on top of existing attic material until depth gauges confirm you have reached the target R-value for Zone 5. For empty or under-insulated wall cavities, dense-pack cellulose is injected through small drilled holes at a density high enough to qualify as an air barrier, eliminating both thermal loss and infiltration without removing siding or drywall. Rim joists and crawlspace walls are sealed and insulated using spray foam where access allows.
Air sealing comes first. Unchecked air leakage at attic bypasses, around light fixtures, and at top plates undermines any insulation upgrade, because convective air movement bypasses the insulating material entirely. Reno's high-altitude, high-desert climate produces relentless thermal cycling that magnifies the cost of air infiltration; pairing insulation with targeted sealing is standard practice on every job we complete. Homes needing broader insulation improvements may combine this work with home insulation across multiple zones, and attics with damaged or contaminated material often require insulation removal before the new installation can begin.
A new HVAC system delivers rated efficiency only if the home's thermal envelope is capable of holding the heat. Reno homes built in the 1950s through 1970s routinely have R-11 or less in the attic and empty wall cavities; upgrading the furnace without addressing the insulation leaves most of the heat loss pathways intact. The result is the same high utility bills every January.
Second-floor bedrooms that are 15 degrees warmer than the main floor in summer, or colder in winter, signal that attic insulation is insufficient and thermal stratification is pulling conditioned air away from where it belongs. In Reno's high desert climate, where daily temperature swings exceed 40 degrees, under-insulated attics lose the battle twice a day, every day of the year.
Cold air leaking in at baseboard level or visible around electrical outlets on exterior walls indicates wall cavities are under-insulated, creating convective loops that move unconditioned air through the house. These same cavities often act as chimneys for stack-effect air movement; sealing them with dense-pack cellulose addresses both thermal loss and infiltration at once.
When snow melts unevenly across a roof after a Reno winter storm, or ice builds up at the eaves while the roof deck above is bare, the cause is heat escaping from living spaces below into the attic. That heat is your utility bill leaving through inadequate or improperly distributed attic insulation. The solution is not roof work; it is sealing and insulating the attic floor.
Reno Insulation performs retrofit upgrades across every application where existing homes fall short of Climate Zone 5 thermal standards. Attic blown-in installations are the most common retrofit because they deliver the highest return: most Reno homes built before 1990 have between R-11 and R-22 in the attic, which loses heat through the roof deck at a rate that makes even the most efficient furnace work overtime every winter. We bring those attics up to R-49 to R-60 using cellulose or fiberglass loose-fill distributed by hose and blower, with depth gauges placed before installation to confirm the final depth meets the target R-value.
Wall cavity retrofits use dense-pack cellulose injection through small drilled holes in siding or drywall. The material is blown under pressure to a density of about 3.5 pounds per cubic foot, which not only fills the cavity but also qualifies as an air barrier under Building Performance Institute standards. This approach transforms an R-0 or R-3 wall into an R-13 to R-15 assembly without tearing apart the interior or exterior finishes. Rim joist and band joist zones, where the floor platform meets the foundation wall, are sealed and insulated using closed-cell spray foam applied directly to the wood surfaces. This is often paired with home insulation work that addresses the full thermal envelope, and attics where the existing material has been contaminated or compacted may require insulation removal before new material can be added.
Bring existing attic floor insulation up to Zone 5 R-49 to R-60 standards using cellulose or fiberglass loose-fill, installed over existing material after air-sealing bypasses.
Fill empty or under-insulated wall cavities in Reno's older homes with cellulose injected at air-barrier density, without removing drywall or siding.
Seal and insulate the thermal weak point where the floor platform meets the foundation wall using closed-cell spray foam applied to rim joist cavities.
Add or replace floor insulation above vented crawlspaces, or apply foam to foundation walls in unvented crawlspaces, both calibrated to Reno's Zone 5 minimums.
Reno sits at approximately 4,500 feet elevation in IECC Climate Zone 5, one of the most demanding thermal environments for residential buildings in the western United States. The city experiences over 6,000 heating degree days annually, with winter nights routinely dropping into the teens and summer afternoons exceeding 100 degrees Fahrenheit. Daily temperature swings of 40 to 50 degrees are normal even within a single day, placing relentless stress on the building envelope. Homes built in the 1950s through 1980s, when energy codes were minimal or nonexistent, are thermally under-equipped for this climate.
Midtown, Old Southwest, the University District, and the McKinley Park area all contain substantial shares of this aging housing stock. These neighborhoods are characterized by original wall insulation of only R-11 fiberglass batts or empty cavities, and attic insulation levels well below the R-49 to R-60 recommended for Zone 5. Homes in Sparks, Cold Springs, and Sun Valley face the same conditions, and retrofit upgrades in these areas consistently deliver 20 to 40 percent reductions in heating costs when paired with air sealing.
Reno's climate also creates an unusually favorable economic case for retrofit work. NV Energy, the regulated electric utility serving the metro area, offers rebates of approximately $0.25 per square foot for attic, wall, and floor insulation, with an additional $400 available when duct sealing is combined with insulation. The federal Section 25C tax credit covers 30 percent of qualifying insulation material costs up to $1,200 per year, provided the improvements meet 2021 IECC thermal standards. Stacking these incentives with the Governor's Office of Energy's anticipated IRA weatherization rebates makes 2025 and 2026 a particularly strong window for retrofit projects, before some credits sunset. The U.S. Department of Energy's 25C guidance confirms material eligibility and IECC compliance pathways.
We respond within 1 business day to schedule an on-site assessment. A brief conversation about your home's age, construction type, and current energy concerns helps us prepare for the visit.
A licensed contractor inspects the attic, wall cavities, and crawlspace or basement to document existing R-values and identify air leakage pathways. The written estimate specifies target R-values, installation methods, and itemized costs, and we address permit requirements and rebate eligibility here, before you commit. Most assessments run 45 to 90 minutes; there is no charge.
On the scheduled date, we begin with air sealing at attic bypasses, top plates, and penetrations. Then insulation is installed using the specified method: blown-in for attics, dense-pack for walls, or spray foam for rim joists. Most single-application retrofits are complete in one day.
Depth gauges confirm attic insulation meets the specified R-value, and product data sheets document material type and thermal performance. We provide copies of all documentation for rebate submissions and permit close-outs, and walk the completed work with you before the crew leaves the site.
The assessment identifies which spaces are under-insulated and which upgrades will deliver the highest return. Written estimate and rebate eligibility review included at no charge.
(775) 491-3183Nevada requires insulation contractors to hold a C-3c license verifying four years of experience, a passing trade exam, and an active surety bond. Our license number is publicly verifiable through the Nevada State Contractors Board online lookup, which takes less than two minutes and confirms we meet every legal standard an unlicensed operator skips entirely.
Reno sits in IECC Climate Zone 5, where recommended attic R-values are R-49 to R-60, not the R-30 to R-38 ranges common in milder regions. We design every retrofit scope to Washoe County's actual thermal demands, not national averages, which means the upgrade delivers the full energy-cost reduction the climate requires.
Every job includes product spec sheets, installation photos, and itemized invoices formatted to meet NV Energy rebate requirements and IRS 25C credit documentation standards. We have processed dozens of rebate claims for Reno-area customers; the paperwork is correct the first time, so you receive the money you are entitled to without follow-up corrections.
Reno Insulation has completed retrofit projects throughout the city's pre-1980s neighborhoods, from the aging homes of Midtown and Old Southwest to the older ranches in Spanish Springs and Cold Springs. We know where to expect empty wall cavities, under-ventilated attics, and the specific construction details that appear in each decade's building practices across Washoe County.
Retrofit insulation is not new construction; it requires different techniques, different materials, and different judgment about how to work within an existing structure without causing unintended problems. The Building Performance Institute sets the national standard for retrofit best practices, and every job we complete in the Truckee Meadows reflects that training foundation.
Comprehensive insulation solutions for the entire home, often including both retrofit and new-construction approaches across multiple spaces.
Learn moreSafe removal of contaminated, compacted, or deteriorated attic insulation before a retrofit installation brings the space up to current Zone 5 standards.
Learn moreCall today for a no-charge assessment and find out exactly which retrofit upgrades will deliver the highest return for your home's age and construction type.