We are located in Poynette, WI
Founded by Dustin Williams and Zach Copiskey, we're a small business owned and operated right in south-central Wisconsin.
We currently provide residential and commercial radon services including testing and mitigation, with additional services coming soon. We provide services in roughly a 50 mile radius of Poynette, WI.
Check out some of our radon mitigation projects from around the area:
Thank you for supporting our small business!
Radon Mitigation System Deforest & Windsor
Reduce your indoor radon gas levels with a custom designed radon mitigation system for your Deforest or Windsor home
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Schedule your radon mitigation system assessment free of charge
Fast & professional mitigation estimates. We never do over the phone 'estimates' or employ outsourced, unqualified technicians for our work
We specialize in radon testing & radon reduction services across Deforest-Windsor & Token Creek area in Wisconsin.
Also providing related radon mitigation system services:
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Radon fan installation (passive to active system)
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Radon mitigation system repair
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Pre & post mitigation testing (real estate compliant)
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Residential and commercial radon testing
NRPP Certified
Fully Insured
Experienced, Local, and Certified Radon Mitigation Pros
Proudly serving the Deforest-Windsor, Token Creek communities and much of south-central WI
Why Choose PureTech?
We act quickly & provide a transparent mitigation estimate
3-5 business day mitigation install window if needed
5-year limited warranty on entire system
Post mitigation 48 hour test included
Nationally certified with NRPP in testing and mitigation
Should Deforest-Windsor Homeowners Consider Radon Reduction Systems?
Wisconsin, and in particular south-central Wisconsin, has a history of returning high radon gas levels from radon testing results throughout the state. The Deforest-Windsor area and Dane County are no exception.
Deforest Radon Remediation Project
In this Deforest area project, the homeowner called us after they had purchased a radon test from the state and it came back elevated. In order to confirm they had consistently high radon gas levels in their living space they asked us to perform a confirmation test with our continuous radon monitor. You can see the pre-mitigation results to the right which are definitely in the range where remediation is recommended by the EPA.
After a proper radon reduction system was installed, the post-mitigation radon test results came back at 0.9 pCi/L, again significantly improving the health implications for the new homeowner.
Pre-Mitigation Avg = 5.6
Post-Mitigation Avg = 0.9
From the homeowner:
"We had a radon mitigation system installed and the process from start to finish was great. They were professional, communication was great, and the process was truly so easy and the end product is great. Highly recommend!"
Sarah B., Deforest, WI
Radon Gas Levels in Deforest-Windsor Area & Dane County
Below is a snapshot of the Dane County radon gas testing results. These images display the latest dataset averaged from 2019-2023 and is provided by the CDC, the most up to date radon testing data available for the state of Wisconsin. Also provided is a health risk equivalent for the average radon levels of Dane County.
We created a tool to get the latest radon testing data and health risks for every zip code in Wisconsin.
Enter your WI zip code below.
How Does A Radon Mitigation System Work?
At it's core, any radon reduction system will be designed to first and foremost prevent radon gas from entering the property. Two key components of any system involve an internal radon remediation or pump system (where we draw radon gas from below your property), and an external radon ventilation system designed to vent radon gas out and above your roofline.
In this example of a radon remediation system, the homeowner has a sump pump installed and we use that same sump pit to extract the radon gas from below the slab, also known as sub-slab depressurization, before it can ever enter the home.
And we install a radon ventilation system. Radon venting is achieved by drawing the gas with a fan and venting the radon gas up above your roofline where the radon gas safely dissipates into the environment.
Here's a quick overview of how to design an effective radon mitigation system for a Deforest-Windsor home. We'll follow this with further explanation of the techniques used.
To lower elevated radon, Deforest homes typically use a radon mitigation system referred to as a sub‑slab depressurization system that pulls soil gas from under the slab or drain‑tile and vents it above the roofline.
EPA recommends fixing at 4.0 pCi/L and suggests considering mitigation between 2.0 - 4.0 pCi/L.
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Test first; confirm with a follow‑up if borderline
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Choose a system type matched to foundation: sub‑slab, drain‑tile/sump, crawlspace membrane, or block‑wall assist.
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Seal penetrations and sump lids to improve draw.
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Vent above roofline; select a continuous‑duty radon fan sized for Deforest soils.
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Post‑mitigation test and re‑test every two years or after renovations.
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Typical WI install cost: low thousands, single‑day work
When to call a pro: If results are ≥4.0 pCi/L—or 2.0–3.9 pCi/L with long‑term exposure—book an NRPP contractor like PureTech Home Services for a designed system and documented post‑test.
Which Radon Reduction System Type Is Best For My Deforest-Windsor Home?
Radon mitigation systems are designed depending on the makeup of the home. Whether the home is multi-level, has a finished or unfinished basement, has a crawl space, has significant square footage, and more are all relevant in the design and installation of a radon mitigation system. Below we'll review several of the core techniques for radon reduction systems in the Deforest area. We may rely on one or all of these techniques to remediate high radon readings.
Sub-Slab Depressurization (SSD)
Most basements in Deforest and Dane County will use a method of radon reduction known as sub-slab depressurization. This technique would be what some would refer to as the gold standard in the radon abatement field.
The technique creates a controlled vacuum below the concrete slab, also referred to as a pressure field, that ventilates radon gas and pumps it safely outside of the home. This radon reduction system often involves drilling, or coring, a hole through the slab. We connect this to a radon pump fan which acts to create the vacuum and provide the radon ventilation out into external air.
Deforest homes frequently have sump pits and drain-tile systems installed. These systems often help to create more effective radon abatement systems but they do require a few slight modifications and appropriate sealing.
Here's a quick radon gas and SSD explainer video from Wisconsin's Department of Health Services (DHS)
CrawlSpace Encapsulation
Crawlspace encapsulation, or crawlspace membrane sealing, is a radon mitigation technique used when a crawlspace is present. Exposed dirt below the living space provides a very limited barrier to radon gas. So the objective is to seal off the exposed ground, creating a barrier between the gas and the living space substrate, and then provide external radon ventilation from below that sealed membrane similarly to a standard SSD system.
The crawlspace encapsulation technique is not commonly deployed as part of a radon reduction system in Deforest because most homes in the area do not have crawlspaces. This technique is much more common in other parts of Wisconsin, though we do occasionally encounter them in Deforest & Windsor homes.
Block-Wall Extraction
Block-wall extraction is a radon reduction technique that's sometimes needed for hollow CMU and block foundation walls. Less a standalone abatement technique, and more an add-on to an SSD radon abatement system, it provides a separate suction point from behind or within the blocks to extract radon gas and connect to the primary system.
How Effective is Radon Mitigation in Deforest?
Radon mitigation system installation is an extremely effective way of dealing with elevated radon gas levels. Radon gas level improvements can be as high as 99% below what they were pre-mitigation. A well-designed system will almost always provide radon reduction below the 4.0 pCi/L action level for the EPA, though no guarantees can be made with any home.
Are radon levels in Deforest worse in the winter?
Yes, radon gas levels will almost always be elevated in Deforest throughout the winter months compared to warmer spring and summer months. This is primarily due to the stack effect which is the negative pressure between the inside and outside of the home that comes naturally with a wider temperature difference. So the colder it gets, the greater the stack effect. An easy way to think of this concept is to think of turning a vacuum to draw soil gas into the home.
Also, generally speaking homeowners will have their windows and doors shut in the winter. This has a two fold effect; decreasing fresh air, and also making the pressure difference worse.
An effective radon mitigation system will run throughout the year, negating much of the stack effect and resulting elevated radon gas in a home.
Can sealants or barriers alone fix a radon problem?
Not effectively. While they can help reduce air leaks, sealants alone rarely bring radon levels down to safe levels, but they are a crucial component of creating an effective radon mitigation system. A full mitigation system is usually needed for consistent results under 4.0 pCi/L.
Do I need to re-test after I have a radon mitigation system installed?
You should always have your home tested immediately following the mitigation system installation. The EPA further recommends testing a home every two years if a mitigation system has been installed.
Will elevated radon levels or a radon mitigation system affect my home's resale value?
It depends. It is quite common that a home buyer's contract will use a radon contingency requiring testing, and if elevated levels are found, a professional take radon abatement measures. Elevated levels with no mitigation system will most likely affect your home's value negatively.
Installing a radon mitigation system typically resolves this and even enhances your home's resale value, as buyers increasingly value safety improvements and peace of mind knowing radon risks have already been addressed.
Radon is a very well-known hazard among construction outfits. So much so that new construction homes very often have passive radon mitigation systems installed by default. Some of these systems need to have a radon fan installed in order to make them effective at reducing radon levels sufficiently.
How Much Does a Radon Mitigation System Cost in Deforest WI?
A radon mitigation system in Deforest will generally cost between $1,300 and $2,300. The total cost will depend on the system requirements mentioned above, as well as the required fan(s), amount of PVC and electrical component routing necessary, or sealing requirements.
PureTech Home Services provides transparent same or next day estimates for all of our radon mitigation assessments.