Commercial Radon Mitigation in Maine
Protect your occupants, reduce liability exposure, and meet EPA compliance standards — with professional commercial radon testing and mitigation throughout Maine.
Who We Serve
We provide commercial radon testing and mitigation for a wide range of property types throughout Maine. Each building type presents distinct occupancy patterns, ventilation configurations, and compliance considerations.
Schools & Education
Children are more vulnerable to radon exposure than adults due to faster respiration rates and longer time spent in school buildings. K–12 schools, colleges, preparatory schools, and trade programs should be tested and re-tested periodically. We work with school administrators to minimize disruption and provide full documentation.
- K–12 public and private schools
- Colleges and universities
- Preparatory schools and academies
- Vocational and trade programs
Apartment & Multi-Family
Landlords and property managers of multi-unit residential buildings face a distinct liability profile. Lower-level units — basements and first floors — are at greatest risk. HUD-assisted housing programs increasingly require radon testing. We provide multi-unit testing protocols and cost-effective mitigation strategies for buildings of all sizes.
- Apartment complexes and condominiums
- HUD-assisted and affordable housing
- Mixed-use buildings with residential units
- Senior housing and assisted living
Office Buildings & Commercial
Office buildings and commercial properties with basement space, ground-floor operations, or mixed foundation types are common candidates for radon mitigation. Employee wellness is an increasingly important workplace concern, and documented radon testing is part of a defensible health and safety program.
- Professional office buildings
- Retail and commercial space
- Warehouses with office components
- Mixed-use commercial properties
Government & Municipal
Town halls, courthouses, police and fire stations, libraries, community centers, and other government-operated facilities in Maine have public access obligations and employee safety responsibilities. We provide testing and mitigation with the documentation and compliance trail that public agencies require.
- Town halls and municipal offices
- Libraries and community centers
- Police and fire stations
- Courthouses and public buildings
Healthcare & Medical
Hospitals, medical offices, dental practices, and rehabilitation facilities see patients who are often already health-compromised. The presence of elevated radon in a medical facility is inconsistent with a duty of care to vulnerable patients. We work with facility managers to test and mitigate with minimal operational disruption.
- Medical and dental offices
- Urgent care and outpatient facilities
- Rehabilitation and therapy centers
- Mental health and counseling offices
Daycare & Childcare
Children spend significant time in childcare settings, and their developing lungs are more susceptible to radon's long-term effects than adults. Licensing requirements in some states already mandate radon testing for daycare facilities, and the trend is toward broader requirements. We help childcare operators meet current standards and document compliance.
- Licensed daycare centers
- Home-based licensed childcare
- Before and after school programs
- Summer programs and camps
Our Commercial Radon Mitigation Process
Commercial radon mitigation is more complex than residential work — larger footprints, multiple zones, and the documentation requirements are different. Here is how we approach commercial projects in Maine.
EPA-Compliant Diagnostic Testing
We deploy professional-grade testing devices in accordance with EPA and ASTM guidelines. For commercial buildings, we develop a testing protocol based on your building's footprint, floor levels, foundation type, and occupancy patterns. Testing locations are selected to give you a defensible picture of radon distribution across the building — not just a single data point.
We provide a written test report that documents methodology, device placement, test duration, and results — the standard documentation expected for compliance and legal purposes.
Site Evaluation & System Assessment
Before designing any system, we perform a thorough site evaluation. This includes foundation mapping, sub-slab communication testing, HVAC review, and identification of all radon entry pathways. In multi-story buildings, we evaluate stack effect and pressure differentials that affect radon migration. In buildings with multiple foundation types — common in older Maine commercial stock — we document each zone independently.
Custom Commercial System Design
Commercial mitigation systems are engineered for the specific building — not adapted from residential templates. For large-footprint buildings, we design multi-point suction systems with appropriately sized fans and dedicated exhaust routing. For multi-zone buildings with different foundation types, each zone gets an independent sub-slab or sub-membrane depressurization network. We specify fan sizing, suction point locations, pipe routing, and exhaust termination for every system we design.
Professional Installation
Our NRPP-certified technicians install the system per the approved design. For occupied buildings, we coordinate installation phasing to minimize operational disruption. We route piping to avoid interference with existing systems and to meet code requirements for exhaust termination. Fan systems are installed with access panels for future maintenance. All penetrations through fire-rated assemblies are properly sealed.
Post-Mitigation Testing & Documentation Package
After installation, we conduct post-mitigation testing using the same protocol as the initial test to allow direct before-and-after comparison. Results are compiled into a written documentation package that includes: pre-mitigation test results, system design specifications, installation record, post-mitigation test results, and system maintenance recommendations. This package is designed for use in regulatory compliance filings, accreditation reviews, insurance documentation, and real estate transactions.
Why Commercial Radon Mitigation Is Different from Residential
Many contractors who offer residential radon mitigation are not equipped for commercial projects. The technical demands — and the documentation obligations — are categorically different.
Scale and System Complexity
A residential system typically uses a single fan drawing from one or two suction points. A commercial building may require multiple fans, dozens of suction points, and carefully calculated pressure differentials across thousands of square feet. Oversized systems waste energy and create noise; undersized systems fail to reduce radon adequately. Proper commercial system design requires sub-slab communication testing and pressure field extension analysis — not just installation experience.
Code and Compliance Considerations
Commercial buildings are subject to building codes, fire codes, and occupancy regulations that residential structures are not. Radon fan exhaust termination, pipe routing through fire-rated assemblies, and mechanical room penetrations all require compliance with applicable codes. Our commercial installations are designed with these requirements in mind from the start — not retrofitted after the fact.
Multi-Zone Mitigation Strategies
Older Maine commercial buildings frequently have multiple foundation types — poured concrete in one section, block in another, crawlspace under an addition. Each foundation type has different radon entry characteristics and requires a different mitigation approach. Multi-zone systems partition the building into discrete mitigation areas, each served by an appropriately designed subsystem. Single-zone thinking applied to multi-zone buildings produces unpredictable results.
Documentation for Inspections, Accreditation, and Transactions
The documentation we provide for commercial projects goes well beyond what a residential mitigation requires. Our commercial documentation package is structured for use by: state and federal regulators, accreditation bodies (for schools and healthcare), insurance underwriters, commercial real estate transaction counsel, and building inspectors. If you ever need to demonstrate that your building's radon has been professionally assessed and addressed, our documentation package is what you present.
Serving Commercial Properties Throughout Maine
We serve commercial clients across the state — from the Portland metro to the Downeast coast, from the greater Bangor region to the western Maine mountains. Our technicians are familiar with Maine's commercial building stock, local building codes, and the geological factors that produce radon throughout the state.
Central Maine
- Augusta
- Waterville
- Gardiner
- Hallowell
- Skowhegan
- Farmington
Southern Maine
- Portland
- South Portland
- Biddeford
- Saco
- Sanford
- Kennebunk
Midcoast Maine
- Rockland
- Camden
- Belfast
- Bath
- Brunswick
- Wiscasset
Western Maine
- Norway
- South Paris
- Rumford
- Bethel
- Oxford
- Lewiston / Auburn
Downeast & Bangor
- Bangor
- Brewer
- Ellsworth
- Bar Harbor
- Machias
- Calais
Maine Radon Regulations and EPA Guidelines
Maine follows EPA radon action level guidelines (4 pCi/L) and is a participant in state radon programs coordinated with the EPA. Maine is among the states with the highest average indoor radon levels, driven by granite and schist bedrock geology throughout much of the state. The Maine CDC and EPA recommend all buildings be tested, with particular urgency for schools, childcare facilities, and buildings with basements or slab-on-grade foundations in Zone 1 counties.
For commercial property owners, the absence of testing documentation is itself a liability risk — it demonstrates that the hazard was not assessed. The presence of a professionally conducted test, whether results are below or above the action level, demonstrates due diligence.
Commercial Radon Compliance in Maine: What Property Owners Need to Know
Request a free consultation and we will walk you through the specifics for your building type. Topics we cover:
- When radon testing is required or recommended for your building type in Maine
- What constitutes an acceptable radon level in commercial occupied space
- How elevated radon creates liability risk and what documentation reduces that exposure
- What documentation to retain for regulatory compliance, accreditation, and real estate
- Typical mitigation timelines and cost ranges for commercial buildings in Maine
No obligation. We'll respond within one business day.
Commercial Projects in Maine
Every commercial building presents a different set of conditions. Here are examples of how we approach different property types.
Building type: Two-story K–8 school, 1960s construction, full basement
Challenge: Basement used for gym and storage, elevated levels throughout ground floor classrooms
System installed: 4-point sub-slab depressurization with dedicated fan units, routed through mechanical room
Documentation: Full compliance package provided for school board and state records
Building type: 12-unit apartment building, slab-on-grade with partial crawlspace
Challenge: Mixed foundation types, first-floor units showing elevated levels
System installed: Dual-zone system — sub-slab depressurization for slab section, sub-membrane for crawlspace
Documentation: Per-unit test results provided, property manager received compliance package for tenant files
Building type: Municipal town hall, 1890s construction, stone foundation
Challenge: Extremely high levels, stone foundation with no slab, historic structure
System installed: Sub-membrane depressurization with positive pressure supplementation, historic preservation constraints observed
Documentation: Full documentation package delivered to town manager for public records and insurance files
Request a Commercial Radon Assessment
Complete the form below to request a commercial radon assessment for your Maine property. We will respond within one business day to discuss your building's needs and schedule a site visit.
- No obligation assessment
- NRPP-certified technicians
- Written quote provided
- Documentation included with every commercial project
Prefer to call directly?
Call (207) 483-5637Protect Your Occupants. Reduce Your Liability. Document Your Compliance.
Commercial radon mitigation in Maine — from schools and daycares to apartment buildings, offices, and municipal facilities. NRPP-certified. EPA-compliant. Documentation provided.