●First, and foremost, accurate test results are a necessary first step in an active depressurization system. Proper and efficient testing, when done correctly gives a necessary glimpse into the radon exposure in a home. With that, we have invested in multiple diagnostic tools to give us the best onsite parameters to pair with your testing. We use 3rd and recommend the company you choose uses third party NRPP approved testing companies or individuals, with Digitally Calibrated continuously read machines that measure your levels every hour while running in your home or office. They also monitor for other variables present, like humidity, air pressure, and tampering with the device. Your mitigation company should also recommend you follow up with your third party company, to keep a checks and balances system in place. If your initial test was digital, and they simply leave a charcoal canister post mitigation, you are NOT getting an apples to apples comparison. Charcoal tests are notoriously inaccurate, and very cheap. They do not require certification for use, and the companies rely on the ability to claim tampering or misuse. We, prefer our clients have peace of mind in their follow up results and know they have a system running exactly as guaranteed!
Once your initial test has established a need to mitigate, we have machines that are designed to detect the levels of radon below your slab. We will provide you with a plan for your mitigation, including our pre diagnostic measurements, and suction points, drill sites with the levels at each one. Then the levels measured there after. You will have peace of mind immediately knowing the performance of your system. We use the NRPP Standards, extensive tools for determining appropriate placement, PFE, fan size, and lots of experience to help us determine all the aspects of your system, and help cut costs on unnecessary energy penalties, and upcharging on parts and labor. We make sure you have a safe system, for your home, and your surrounding neighbors.
● We are State Licensed, NRPP certified, and fully insured. At Metro Radon Co, we care about quality, and truly mitigating the risk in radon exposure. You won't find our radon reduction and mitigation systems venting halfway up the side of a house, or too close to operable windows. We don't make guesses in properly mitigating your system. Some situations will prove more difficult than others, and there may be a need for a second visit, but our goal is to utilize knowledge, experience, and diagnostics to get you the ideal outcome the first time, with the best aesthetic appeal.
~Your home type will affect the kind of radon reduction system that works best. Generally homes are categorized according to their foundation design. For example: basement; structure floor, slab-on-grade, concrete poured at ground level; or crawlspace, a shallow unfinished space under the first floor. Sometimes we find homes with more than one foundation type or unique situations. In situations such as these a combination of radon reduction techniques may be needed to effectively reduce radon levels to below 4 pCi/L. Our guarantee surpasses this level, and we guarantee 2.7pCi/L.
In homes that have a basement or a slab-on-grade foundation, radon is usually reduced by one of four types of soil suction: subslab suction, drain-tile suction, sump-hole suction, or block-wall suction. Active subslab suction — also called subslab depressurization — is the most common and usually the most reliable radon reduction method. One or more suction pipes are inserted through the floor slab into the crushed rock or soil underneath. They also may be inserted below the concrete slab from outside the home. The number and location of suction pipes, and size of fan that are needed depends on how easily air can move in the crushed rock or soil under the slab and on the strength of the radon source. Some homes sit on clay, some on more of a small river rock, other on a silty soil...many variables play into this. Often, only a single suction point is needed. Here is where our sub slab diagnostic tools help come into play even more to get more accurate readings the first time.
A radon vent fan connected to the suction pipes draws the radon gas from below the home and releases it to air outdoors, above the roofline, away from windows and neighbors, while simultaneously creating a negative pressure or vacuum beneath the slab. Common fan locations include unconditioned home and garage spaces, including attics and the exterior of the home.
Often, when a home with a basement has a sump pump to remove unwanted water, the sump can be capped so that it can continue to drain water and serve as the location for a radon suction pipe. Even if we are not able to make this the most effective place to draw from, we will seal it as sumps are typically major offenders of radon entry.
Vapor Barriers are needed for homes with a crawl space, as soil is our biggest culprit for radon entry. An effective method to reduce radon levels in crawlspace homes involves covering the dirt floor with a high-density plastic sheet. We source this specifically for this purpose and use a great brand we trust designed for radon reduction, and moisture prevention. We do not cut any corners here. A vent pipe and fan are used to draw the radon from under the sheet and vent it to the outdoors. This form of soil suction is called submembrane suction, and when properly applied is the most effective way to reduce radon levels in crawlspace homes.
Sealing; Along with the system that works best with your home, we will use the proper caulking, foam, concrete, and sealant and close up foundational cracks, sump pits, gaps, and damage your home has sustained over the years that can be a radon entry point to give you the best results, and lasting integrity, within your budget. While an essential part of the system, and effective in helping to reduce radon, sealing is not recommended as being effective as a stand alone solution.The main purpose of this portion is truly to maintain your energy loss, and capitalize on the depressurization system.
●All systems should be retested and checked for operational integrity by a certified Radon professional every 2 Years. Ask us, or your Radon team about a service or Maintenance Plan to ensure we keep the radon away.
●New homes can be built with radon-resistant features. It is now required in most areas homes be built with Passive Systems. (Passive systems are installed in New Home Builds and do not typically come with pre-testing, as they are designed to be a first line of defense. These can be designed a few ways, and offer a place for the home owner to obtain an active system, if necessary. Some times a passive system will be enough to mitigate low levels.) We ALWAYS recommend testing your new home for radon, even with a Passive System, and especially during the first months you will be using your heating system in your home to get the most accurate level of Radon exposure.
Radon-resistant construction techniques can be effective in reducing radon entry. When installed properly, these simple and inexpensive techniques can help reduce indoor radon levels in homes. Make sure your builder is engaging in radon resistant construction, but know that most of these basic systems won't be effective enough alone in the long run. Installing a resistant system is still cheaper for your builder and you at the time of construction and typically it makes it easier and less expensive to reduce radon levels further through active reduction if these passive techniques don’t reduce radon levels to below 4 pCi/L. Remember!!! Every new home should be tested after occupancy, even if it was built radon- resistant.