Have you tested your home yet?  If not,

Reducing your radon exposure: the mitigation process.  

Radon Reduction Techniques DO Work
Some radon reduction systems may reduce levels in your home by up to 99%.  The cost of fixing a home generally ranges from about $500 - $2500.  Your costs may obviously vary depending on the size and design of your home and which method you choose.  Thousands of people have reduced the radon levels in their homes by implementing these techniques. 

Either a licensed professional mitigator or a skilled homeowner can reduce the radon concentration in your home. Detailed information on �do-it-yourself� radon reduction or hiring a mitigators is available at 1-800-SOS-Radon or  If you plan to �do-it-yourself�, I recommend that you get a copy of the book Protecting Your Home from Radon: A step-by-step Manual for Radon reduction. It  is available from Colorado Vintage Companies 709-632-1215 for ~$30.

Here a some notes on radon mitigation:

      Reducing the radon concentration in your home�s living spaces is the best way to lower your radon-related risk for lung cancer.

      There are many methods to reduce radon in your home:

         Soil suction (active/passive sub-slab depressurization, drain tile suction, sump hole suction, block wall suction) is used is houses with basements or slab on grade foundations.  It uses pipes and/or fans to suck the radon from the soil around and under the house and force it above the roof, where it will dissipate harmlessly into the outdoor air.

         Methods used in houses with crawlspaces include: ventilation to reduce the home�s suction on the soil and dilute the high radon air and sub-membrane depressurization, which covers the dirt crawlspace floor with a plastic sheet.  A pipe then draws the radon rich air from under the sheet to the outside.

         Sealing cracks and openings in your foundation seldom changes the radon concentration unless it is used with other mitigation methods.

         House pressurization sends air into the basement or living area from outdoors or upstairs using a fan.  It attempts to create pressure at lower levels that will prevent radon from the entering the house. It may help some homes if soil suction doesn�t work.

         Natural ventilation is sometimes effective, but sometimes it increases the indoor radon! Opening windows on the lower level of your home dilutes the air and reduces the vacuum effect (by which radon gas enters the house through suction).  This method also works best in conjunction with other reduction methods. But it is expensive in cold climates.

         A heat recovery ventilator will increase ventilation and use the heated or cooled air to warm or cool the incoming air but it is expensive and usually only is effective in very tight homes.       



Typical  Radon Reduction

  Typical  Range

 of  Installation                                    Cost (Contractor)

Typical                         Operating                      Cost(Annual)                                                          


Subslab Suction      




Works best if air can move easily in  material under  slab.

Passive Subslab  Suction



There maybe some energy penalties

May be more effective in cold climates; not as effective as active subslab suction.

Draintile Suction




Works best if draintiles form a complete loop

Blockwall Suction




Requires sealing of major openings as well

Sump hole suction




Works best with draintile systems

Sealing Radon Entry Routes




Normally used with other  techniques; proper materials & installation required

Natural Ventilation

Variable and unknown

None($200-$500 if vents installed)


Significant heated/cooled  air loss; operating  costs depend on utility rates & amount of ventilation.

Heat Recovery Ventilation




Limited use for unusual houses with moderate to low radon problems

   * NOTE: The fan electricity and house heating/cooling loss cost range is based on certain assumptions regarding climate, your house size, and the cost of electricity and fuel. Your costs may vary. Numbers based upon 1991 data.




Radon Mitigation Services

This is a list of the National Environmental Health Association�s licensed mitigation professionals (mitigators) serving Minnesota and the surrounding area in 2006 whose work I am familiar with

Randy J. Weestrand

Radon Removal, Inc.

525 Orchard Park Road

Minneapolis, MN 55356

Telephone: (952) 476-6226;


Covers all areas of central, western and southern Minnesota.

Basic system for most houses within an hour�s drive of MSP costs  ~$1000. (Additional costs for longer drives $50/hr, larger houses)

Five year guarantee to lower the radon below 4 pCi/L. Recent clients evaluations included with bid

Two week lead time to schedule installation; 4-5 hours in home for installation.

Experienced, has installed several thousand systems.

(I observed Randy and his son install a system on 11/21/01. They did a professional job that lowered the radon from 8 to 1.5pCi/L.)

Robert Carlson
William R. Carlson
Eric Carlson
Healthy Homes

130-16th Ave. South
St. Cloud, MN 55104
St. Cloud: (320) 493-5248
Metro:16526 W 78th St. Apt. 156
Eden Prairie MN 55346
(952) 220-9409

Basic system $800-$1500. 
Continuous Rn monitor testing; Real Estate $150
Five years experience, many systems installed
Free in home inspection/estimate
Warranty to lower houses below 3pCi/L
Payment upon verified test results

Client recommendations available.

Robert Worth Frank
Energy & Environmental Services

1608 Hague Avenue
Saint Paul, MN 55104

Telephone: (651) 646-3470

Covers 150 mile radius of base.
Basic system for most houses within an hour�s drive of MSP costs  ~$1000. (Additional costs for longer drives ~$1600 for overnight). Five year warranty to lower the radon below 4 pCi/L.
ecent clients evaluations available.
Installation takes a day.
Experienced; also can install hybrid systems that help with other air quality issues

Chris Reyerson
Valley Radon Mitigation

431 Morrison St.

Fargo, ND

Telephone: (701) 866-8901

Covers Minnesota, North Dakota, and South Dakota. Basic sub slab system  ~$1350 (no extra travel). One week lead time. Has experience in places like Appleton, Ortonville, East Grand Forks.

References available.  System pricing ~$1000


A current list of select mitigators in Minnesota can be found at:

If you live in another state check these websites for mitigators serving your area. or 

No Additional Information:

Bradley S. Nyberg

Quality Radon Services

2200 Dupont Avenue N.

Minneapolis, MN 55411-2235

Telephone: (612) 521-3580

David J. Bean

Home Environments LLC
1944 Estes Ave. SW
MN 55390
Telephone: (612) 874-2179


Alan D. Rasmussen
 Raz's Home Maintenance

26273 St. Croix Trail
MN 55074
Telephone: (651) 257-9731

Jesse Trebil

Jesse Trebil Foundations Systems

17550 30th Avenue SE

Atwater, MN 56209

(800) 430-5851

Eric Juvland

Juvland Home Care

8329 50th Avenue North

New Hope, MN 55428

Telephone: (612) 221-2006


Tim A. Jacobs
Tim A. Jacobs

12635 88th Place
Maple Grove, 
MN 55369
Telephone: (612) 875-2179

Paul A. Novotny
Paul Novotny Radon Remediation

9155 Pioneer Trail
Telephone: (763) 498-7433

Brian D. Delmore

Professional House Doctors

22880 Orchid Avenue

Rogers, MN 55374


(800) 694-6370

Gerald E. Gray

A & J Home Inspections

Box 213 20 Ash W.

Trimont, MN 56176-0213

Telephone: (507) 639-5441


Zane A. Nevala

Radon Abatement Services

5693 Oliver Ave. SW    

Cokato, MN 55321






Most radon mitigators will do a short-term (4 to 7 day) radon test after they install the system. The US Environmental Protection Agency recommends that you also do a long-term (90 to 365 day) test following the short-term test. You can get long-term tests from the Minnesota Radon Project (800-820-3209) or see

See for another list of Minnesota mitigators and advice.



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