Insulation contractors in Johnston, IA
Tell us about your insulation project in Johnston and compare bids from local pros.
What affects insulation in Johnston?
Climate zone
Johnston sits in IECC climate zone 5A, per the 2021 International Energy Conservation Code climate zone map.
Source: 2021 International Energy Conservation Code climate zone map
Licensing
Iowa requires a Contractor Registration from Iowa Department of Inspections, Appeals, and Licensing (DIAL). Look up any contractor here: https://laborportal.iwd.iowa.gov/iwd_portal/dashboards/contractor-home.
About Johnston, IA
- Population
- 24,384
- Source: U.S. Census Bureau, American Community Survey, 2024
- Median household income bracket
- $100,000-$124,999
- Source: U.S. Census Bureau, American Community Survey, 2024
- Median annual property tax bracket
- $3,000 or More
- Source: U.S. Census Bureau, American Community Survey, 2024
- Climate zone
- IECC climate zone 5A
- Source: 2021 International Energy Conservation Code climate zone map
- Storm history
- From 2016 through 2025, Polk County recorded 127 hail events of 1 inch or larger, 34 severe hail events of 1.75 inches or larger, 202 damaging-wind events of 58 mph or stronger, and 16 tornado events, per NOAA Storm Events data.
- Source: NOAA Storm Events Database
ZIP codes in Johnston
50109, 50111, 50131, 50322
Insulation in Johnston: common questions
How does the local climate affect insulation in Johnston, IA?
Johnston sits in IECC climate zone 5A, per the 2021 International Energy Conservation Code climate zone map.
How do I get bids for insulation in Johnston, IA?
Describe your project in the bid form on this page. Companies that take this kind of work may contact you with bids. There is no obligation to hire anyone.