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Serving Reno, NV and surrounding areas(775) 491-3183
Reno's winters push below 20°F for weeks at a stretch, and under-insulated walls bleed that heat out faster than any furnace can replace it. Whether your home is a pre-1980 Midtown bungalow or a new build in South Meadows, the right wall insulation closes that gap without disrupting your living space.
Wall insulation in Reno fills stud cavities to meet Nevada's Climate Zone 5B minimum of R-20 — most retrofit jobs on a single-story home are completed in one day without removing a single sheet of drywall.
A significant share of Reno's housing stock was built before 1980, when federal energy codes required little to nothing in exterior walls. Walk through an Old Southwest or Newlands District home built in the 1960s, and the wall cavities may contain R-7 fiberglass batts — or nothing at all. That gap matters every time a Washoe Zephyr wind event pushes cold outside air through the gaps around outlets, pipe penetrations, and framing connections. Properly insulated walls slow both conductive heat loss through the assembly and convective air movement within the cavity.
For most finished Reno homes, the answer is a drill-and-fill blown-in retrofit paired with air sealing at every penetration. Open-framing new construction gets batt insulation sized to the stud depth, or spray foam insulation where vapor control and air sealing in a single product make sense. Homes where wall cavities are inaccessible from either side — a situation common in older brick-clad or stucco construction — may qualify for blown-in insulation injected through small exterior access holes that are patched and painted afterward.
If one or two rooms in your home are noticeably colder in winter or warmer in summer than the rest of the house, the exterior walls in those rooms are likely under-insulated. In Reno's climate, a 2x4 stud cavity with no insulation contributes almost nothing to keeping conditioned air inside.
Replacing equipment only fixes half the equation if the building shell is leaking heat through bare or degraded wall cavities. Reno homes built before 1978 frequently have R-7 or lower in their walls — well short of today's R-20 minimum — and no amount of furnace efficiency overcomes that gap.
Wall surfaces that feel noticeably cold to the touch in winter, or that show condensation or moisture staining, indicate that cold outdoor air is reaching the interior drywall. In Reno's dry winters this can still cause moisture damage at the drywall face in areas where humidity is introduced by cooking or bathing.
If you notice wildfire smoke smell inside your home even with windows closed, the wall assembly has significant air gaps. These same gaps drive energy loss in every other season. Air sealing alongside wall insulation addresses both problems at once.
The right approach depends on whether the walls are open, closed, or somewhere in between. For finished homes where the drywall is staying, dense-pack blown-in is the standard retrofit method. Small holes — typically two inches in diameter — are drilled into each stud bay through the exterior sheathing or, in some cases, the interior drywall. Cellulose or fiberglass loose-fill is then injected under controlled pressure until the cavity reaches the density required to resist settling. The holes are plugged and finished. No drywall comes down, and most homeowners are back to a normal household by evening.
When walls are open during a renovation or new construction, the choices expand. Fiberglass or mineral wool batts cut to the stud depth are the most common option — they go in fast, require no curing time, and are straightforward for inspectors to grade. Mineral wool adds fire resistance and meaningfully better sound reduction compared to standard fiberglass, which matters in Reno neighborhoods with shared walls or street noise. For open-framing projects where a contractor wants both insulation and complete air sealing in a single product, spray foam insulation — either open-cell or closed-cell — fills the cavity completely, adheres to the framing, and eliminates air movement through the assembly. Closed-cell foam reaches approximately R-6.5 per inch, allowing a 2x6 wall to exceed R-38 in a single pass.
Continuous insulation panels — rigid foam board or mineral wool — installed over the exterior wall plane address thermal bridging through studs, which standard cavity insulation cannot. The 2018 Nevada Energy Code accepts R-13 cavity plus R-5 continuous insulation as a code-compliant alternative to R-20 full-cavity on new builds in Climate Zone 5B. For homeowners considering blown-in insulation in existing walls, it is worth noting that the North American Insulation Manufacturers Association (NAIMA Insulation Institute) maintains installation quality standards that guide density targets and grading requirements — the benchmarks our crews use on every retrofit job.
Best for finished homes where drywall stays in place — cellulose or fiberglass injected through small drilled holes, with no demolition required.
Best for open-framing new construction or renovation — quick installation, no curing time, easy for inspectors to grade.
Best when both insulation and complete air sealing are needed in a single pass — ideal for open framing with complex penetrations or irregular cavities.
Best for new builds targeting the R-13+5ci code path — rigid foam or mineral wool boards installed over the exterior wall plane to eliminate thermal bridging.
Reno sits at roughly 4,500 feet in IECC Climate Zone 5B — a cold, semi-arid designation that demands more from wall assemblies than most of the American West. The city regularly sees lows below 15°F in January and afternoon highs above 95°F in July. An under-insulated wall is not just uncomfortable in one season; it drives energy loss in both directions all year. Nevada's 2018 Energy Code sets the prescriptive wall minimum at R-20 precisely because the heating and cooling loads here justify it.
The Washoe Zephyr — the downslope wind that funnels through the Truckee Meadows from the east slope of the Sierra Nevada — creates pressure differentials across building envelopes that accelerate air infiltration through any gap in the wall assembly. Combined with Reno's growing wildfire smoke seasons, those same gaps become pathways for fine particulate matter. A fully insulated and air-sealed wall assembly reduces both energy loss and indoor air quality impacts from smoke events.
Reno's rapid growth has created two distinct project types. In established neighborhoods, drill-and-fill retrofit work is the norm — particularly in Sparks and Spanish Springs, where older housing stock and newer subdivisions sit side by side. In faster-growing corridors like Fernley, new construction requires full Nevada Energy Code compliance from the foundation up, with signed installer certificates for the building inspector's file.
Reach Reno Insulation by phone or through the online form. We reply within 1 business day to learn about your home's age, construction type, and which rooms concern you most.
A technician inspects accessible wall cavities, checks for existing insulation using a probe or thermal camera, and determines the correct method — drill-and-fill, batt, or spray foam. The written estimate includes materials, labor, and any permit fees, so the number you see is the number you pay.
Crew installs material to meet Nevada's Climate Zone 5B requirements. For retrofit work, holes are drilled, cavities are filled to density, and plugs are installed and finished flush. For open-wall new construction, batts or spray foam are applied before drywall closes the cavity.
We walk through the completed work with you, confirm all cavities were reached, and provide itemized invoices formatted to support your Inflation Reduction Act tax credit claim — so your paperwork is ready before the job invoice is even paid.
No obligation. We assess your walls, tell you what the code requires, and give you a written number before any work is agreed to.
(775) 491-3183Nevada requires insulation contractors to hold an active Nevada State Contractors Board license. Ours is current and searchable on the NSCB public lookup tool, protecting your homeowner's insurance coverage and confirming the work qualifies for federal tax incentives.
We have completed wall insulation work across the Truckee Meadows, from pre-1980 bungalows in Old Southwest Reno to new-build framing in Damonte Ranch and South Meadows. Knowing the local building stock means fewer surprises once the drill bit meets the sheathing.
Every wall insulation project is spec'd to Nevada's 2018 Energy Code Climate Zone 5B minimums. We pull permits through the correct jurisdiction — City of Reno Building Safety Division or Washoe County Building Department — and prepare documentation for the inspector.
We provide itemized material and labor invoices formatted to support your 30% Energy Efficient Home Improvement Credit claim under the Inflation Reduction Act, up to $1,200 per year — ready to hand to your tax preparer without additional legwork.
The license, the local experience, and the code compliance are not separate selling points — they are the baseline for any job that needs to pass a Reno or Washoe County inspection and hold up over a Nevada climate cycle. The IRA documentation is a practical benefit on top of that, one that meaningfully reduces the net cost of a wall insulation upgrade for most homeowners.
Loose-fill cellulose or fiberglass delivered pneumatically into attic floors or closed wall cavities — the same material used in most retrofit wall projects, covered in detail.
Learn moreTwo-component foam that expands to fill irregular cavities and penetrations, insulating and air-sealing wall assemblies in a single application.
Learn moreReno's heating season starts in October. Scheduling now means your walls are sealed before the first hard freeze.