Spray foam insulation in Lincoln, NE: get up to 3 quotes from vetted local installers
Request free quotes from up to three vetted spray foam installers serving Lincoln and nearby Lancaster County. Below: what your climate zone means for open vs closed cell, how much insulation to ask for, Nebraska's energy code, and the rebates we could verify.
- Climate zone: 5A (2021 IECC)
- Attic target: R-60 (ENERGY STAR, uninsulated attic)
- State code: 2018 IECC (Nebraska Energy Code)
- Utility rebates we verified: LES Sustainable Energy Program
- Federal 25C credit: ended for 2026 installs
Facts last checked October 16, 2026. Sources are linked in each section.
Where we match quotes from this page
Requests from Lincoln and ZIP codes whose center is within about 20 miles of it go to our Lincoln, NE partner installers (46 ZIP codes): 68017, 68304, 68317, 68333, 68336, 68339, 68347, 68349, 68358, 68360, 68366, 68368, 68372, 68402, 68404, 68418, 68419, 68423, 68428, 68430, 68438, 68461, 68462, 68502, 68503, 68504, 68505, 68506, 68507, 68508, 68510, 68512, 68514, 68516, 68517, 68520, 68521, 68522, 68523, 68524, 68526, 68527, 68528, 68531, 68532, 68588. Outside these? Send the form anyway and we'll tell you if we can't match you.
Climate zone 5A: what it means for spray foam
Lincoln's central point is in Lancaster County, which the 2021 IECC county map assigns to climate zone 5A (cold in DOE's Building America terms). Zone 5A is a moist ("A") zone, which drives the vapor and R-value rules below.
Other counties within our Lincoln service radius: Cass County (5A), Gage County (5A), Otoe County (5A), Saline County (5A), Saunders County (5A), Seward County (5A). All are zone 5A too.
Source: PNNL-33270, Guide to Determining Climate Zone by County (IECC 2021).
Open cell vs closed cell in Lincoln, NE
Attic roofline: in zone 5A, IRC Section R806.5 requires that air-impermeable insulation under an unvented roof deck either be a Class II vapor retarder itself or be covered with a vapor-retarder coating. Closed-cell foam meets that on its own at typical thicknesses; open-cell foam needs vapor-retarder paint. In a hybrid assembly the foam layer at the deck must be at least R-20.
Rim joists and basement walls are where spray foam pays off fastest in cold climates: closed cell air-seals the leaky band joist and blocks moisture in one pass, which is hard to do with batts.
Metal buildings, pole barns and shops
For uninsulated metal roofs and walls, closed-cell foam sprayed directly on the panels is used both as insulation and as a vapor retarder to stop condensation from forming and dripping on the underside of the metal. When you request quotes, choose "Metal building / pole barn" and give the building's footprint and wall height; ask each installer for foam type, thickness, and whether a thermal or ignition barrier coating is required for how the building will be used. We don't have data on how common these buildings are around Lincoln, so we won't guess.
How much insulation to ask for
| Where | ENERGY STAR recommendation for zone 5A |
|---|---|
| Attic, uninsulated | R-60 |
| Attic with 3–4" of existing insulation | add R-49 |
| Floor over unconditioned crawlspace/basement | R-30 |
| Basement or crawlspace walls | R-15 continuous or R-19 cavity |
| Exterior walls (when re-siding) | add R-5 to R-10 insulative wall sheathing beneath new siding |
To reach R-60 with foam alone you'd need roughly 16.2–17.1" of open cell (about R-3.5 to R-3.7 per inch) or 8.6–12.0" of closed cell (about R-5 to R-7 per inch). Many roofline spray foam jobs are installed thinner than that and justified through the code's performance path or the unvented-attic rules, so ask every installer to write the foam type, thickness and resulting R-value on the quote and explain how it meets your local code.
Source: ENERGY STAR, Recommended Home Insulation R-Values (based on 2021 IECC). ENERGY STAR's figures are recommendations for existing homes; your local code sets the legal minimum for new work.
Nebraska energy code
2018 IECC (Nebraska Energy Code), effective July 1, 2020. Jurisdictions may adopt their own code if it is equivalent; where a city has none, the state enforces the state code.
Source: NAHB, "Residential Provisions of the IECC: State Adoption Status" (current as of May 2026); official state status at DOE Building Energy Codes Program.
Homes in Lincoln, NE
Census figures for Lincoln city (ACS 2020–2024 5-year estimates): about 128,449 housing units, a median year built of 1982, 47% built before 1980 and 15% built in 2010 or later. 56% are single-family detached homes and 2% are mobile/manufactured homes. 56% of occupied homes are owner-occupied, with a median owner-reported home value of $264,000.
- With 47% of homes built before 1980, many attics here predate modern energy codes. Older attics often need old insulation removed or air-sealed first, and knob-and-tube wiring must be checked before any insulation covers it. Ask whether removal and prep are in the price.
- 64% of homes heat with utility gas. Spray foam makes a house much tighter, which changes how gas furnaces, water heaters and fireplaces draft, so ask whether the installer (or your HVAC contractor) will do combustion safety testing after the job. Some utility rebates require it.
Rebates and incentives for Lincoln, NE
Utility programs that may apply, depending on which utility serves your address:
LES Sustainable Energy Program
$0.50/sq ft for attic insulation (R-19 or less to R-49+) and $0.80/sq ft for exterior wall insulation, up to $1,500 per household; pre-authorization and pre/post blower-door tests are required.
Read on the program's own page October 16, 2026. Programs change; confirm before you sign.
Nebraska state Home Energy Rebates
Not yet launched Nebraska State Energy Program IIJA/BIL & IRA Formula Funding Opportunities
Electrification/appliance rebates (HEAR): "High-Efficiency Electric Home Rebate Program The purpose of this program is to award grants to state energy offices and Tribal entities to develop and implement a high-efficiency electric home rebate program. Status: Preparing Application"
Whole-home efficiency rebates (HOMES/HER): "Home Energy Performance-Based, Whole-House Rebates The purpose of this program is to award grants to state energy offices to develop a whole-house energy saving retrofits program that will provide rebates to homeowners and aggregators for whole-house energy saving retrofits. Status: Preparing Application"
Official source: Nebraska Department of Water, Energy, and Environment. Status text compiled via referencesource.org, last checked by them August 25, 2026. Full Nebraska rebate page →
What spray foam costs (national published ranges)
We don't have enough local quotes for Lincoln, NE to publish local prices, and we won't make them up. These national ranges are a starting point; your installers' quotes are what count.
| Example job (typical thickness) | Estimated installed range |
|---|---|
| 1,000 sq ft attic roofline, open cell (6") | $3,600–$9,600 |
| 1,000 sq ft attic roofline, closed cell (3") | $3,900–$9,300 |
| 1,500 sq ft walls, open cell (3.5") | $3,150–$8,400 |
| 1,500 sq ft walls, closed cell (2") | $3,900–$9,300 |
| 200 sq ft rim joists, closed cell (2") | $520–$1,240 |
Board feet × Angi's 2026 installed price per board foot. Angi reports a national average spray foam project of $2,888 (typical $1,455–$4,337). Check a quote you already have →
Questions to ask each installer
- Foam type, brand, thickness and resulting R-value for each area, in writing.
- Which climate zone and code edition they're designing to.
- Whether removal of old insulation, air sealing, and any required ignition/thermal barrier coating are included.
- Whether they participate in LES Sustainable Energy Program, and who files the paperwork.
- Whether they'll do (or coordinate) combustion safety testing if you have gas appliances.
FAQ
What climate zone is Lincoln, NE in?
Lancaster County is IECC 2021 climate zone 5A, per PNNL's county list (PNNL-33270).
Should I use open-cell or closed-cell spray foam in Lincoln, NE?
In zone 5A, open cell under a roof deck needs a vapor-retarder coating (IRC R806.5); closed cell doesn't. Closed cell is also the standard choice for rim joists and basement walls.
How much attic insulation do homes in Lincoln, NE need?
ENERGY STAR recommends R-60 for an uninsulated attic in zone 5A (or adding R-49 on top of 3–4 inches of existing insulation). Nebraska's code: 2018 IECC (Nebraska Energy Code).
Are there spray foam or insulation rebates in Lincoln, NE in 2026?
The federal 25C tax credit does not apply to insulation installed after December 31, 2025. Utility programs that may apply, depending on which utility serves your address: LES Sustainable Energy Program. Nebraska's state Home Energy Rebate program status: Not yet launched.
How much does spray foam cost in Lincoln, NE?
We don't publish local prices until we have enough real local quotes. National published ranges are about $0.60–$1.60 per board foot for open cell and $1.30–$3.10 for closed cell, installed (Angi, 2026), and many companies have a $1,000–$2,000 minimum.
How does requesting quotes work?
Fill in the form once. We pass your request to up to three vetted partner installers who serve Lincoln, NE, and they contact you to schedule an estimate. It's free and there's no obligation.