--- title: "DIY Radon Mitigation in Pennsylvania: What the Law Allows and What to Watch For" canonical: "https://radonmitigationyorkpa.net/radon-guide/diy-radon-mitigation-pa/" pubDate: "2026-10-01T00:00:00.000Z" updatedDate: "2026-10-03T00:18:00.000Z" author: Radon Mitigation York PA description: "Can you install your own radon system in PA? What the law allows, the steps involved, and why DIY systems often fail the clearance test." --- # DIY Radon Mitigation in Pennsylvania: What the Law Allows and What to Watch For Yes, Pennsylvania lets you do DIY radon mitigation in a home you own or live in, without DEP certification. Anyone doing [professional radon mitigation installation](/services/radon-mitigation-system-installation/) on someone else's home must be certified by PA DEP. DIY systems can work, but many fail the clearance test because of poor suction point placement, weak sealing or the wrong fan. ## What Pennsylvania law says Pennsylvania's Radon Certification Act and its rules in 25 Pa. Code Chapter 240 require certification for anyone who tests for or mitigates radon for others. The rules exempt a person testing or mitigating a building that the person owns or lives in. That means: - **You can** install a radon system in your own home. - **You cannot** install one for a friend, neighbor, tenant or client without DEP certification. - **A landlord** working on a building they own falls under the owner exemption, because the rule covers buildings a person owns, not just the home they live in. A handyman or contractor the landlord hires is not covered. Tenants and buyers may still expect certified work. The DEP's technical standards for mitigation apply to certified mitigators. They are still the best guide for a DIY job, because they reflect what keeps a system safe and working. You can find them through the [PA DEP Radon Division](https://www.pa.gov/agencies/dep/programs-and-services/radiation-protection/radon-division). ## What a DIY install involves A DIY system uses the same parts as a professional one. Here is the basic process. 1. **Test first.** Confirm your level with a proper test in the lowest lived-in level. 2. **Check air movement under the slab.** Drill small test holes and see whether suction from a shop vacuum spreads across the floor. 3. **Pick the suction point.** Near the middle of the slab and near a workable pipe route. 4. **Core the slab.** Cut a 4 to 5 inch hole and dig out a pit of soil and gravel underneath. 5. **Run the pipe.** Use PVC, sloped so condensation drains back down, and sealed at every joint. 6. **Mount the fan.** Outside the living space: an exterior wall, a non-living attic or a garage. 7. **Wire the fan.** Follow electrical code. Exterior fans need weather-rated wiring and a disconnect. Permit rules for electrical work vary by municipality, so ask your local code office before you wire the fan. 8. **Carry the discharge above the roof.** At least 12 inches above the roof and away from windows and doors. 9. **Seal openings.** Large cracks, floor-wall gaps, the sump lid and pipe holes. 10. **Add a manometer.** A U-tube gauge to show the fan is pulling. 11. **Test again.** No sooner than 24 hours after the fan starts, and within 30 days. ## Why DIY systems often fail the clearance test Most failed DIY systems come down to a few mistakes. ### Suction point in the wrong spot A corner location, or one far from the main radon entry areas, may not pull suction across the whole slab. Without a diagnostic test, it is easy to guess wrong. ### Small or no suction pit Coring the slab and pushing the pipe in, without digging out soil beneath, limits how far the suction spreads. ### The wrong fan A fan that is too weak for tight soil will not reach the edges of the slab. A fan that is too strong wastes power and may be loud. Matching the fan takes some testing. ### Poor sealing An open sump, large cracks or open block wall tops let the fan pull basement air instead of soil gas. ### Missed foundation areas Many York homes have additions on crawl spaces or slabs, or stone foundation sections. Each may need its own suction. ## Safety issues to avoid Some DIY mistakes can make things worse, not better. - **Fan inside the house.** A fan in the basement or a living space can push radon into your home through any leak on the exhaust side. Pennsylvania standards do not allow this for certified installs. - **Discharge near windows.** Venting radon at ground level or near a window can let it right back in. Pennsylvania standards call for at least 10 feet from openings, unless 2 feet above them. - **No way to check the fan.** Without a manometer, you will not know when the fan stops. - **Unsafe electrical work.** Fans run all day and night outdoors. Wiring must be done safely. ## What about adding a fan to a passive system? Some newer homes have a passive radon pipe with no fan. It is usually capped in the basement and runs to the roof. Adding a fan can turn it into an active system. Under the owner exemption, you can add the fan yourself. The fan must go in the attic or outside, not in the basement or living space. You will need power at the fan location, a manometer, and a test afterward. Many passive pipes were not built with a fan in mind, so the pipe size, route and seal at the slab may need work. Our page on [passive radon system activation in York](/services/passive-radon-system-activation/) explains what that service involves. ## When DIY makes sense DIY may be a reasonable choice when: - Your level is only a little above 4.0 pCi/L. - You have a simple poured slab with gravel underneath. - There is an easy exterior pipe route. - You are comfortable with coring concrete, wiring and ladder work. It makes less sense when: - You are selling and need a clearance result by a deadline. - Your home has stone walls, a crawl space or mixed foundations. - Your level is very high. - The pipe needs to run through finished space. Think about how the system will look, too. An exterior route is often simplest for DIY, but it is the most visible. See [what a radon system looks like on the outside of a house](/radon-guide/radon-system-on-house-exterior/) before you pick a path. ## DIY vs. hiring a certified mitigator | Factor | DIY | DEP-certified mitigator | |---|---|---| | Legal in your own home | Yes | Yes | | Legal for others' homes | No | Yes | | Diagnostic testing | Often skipped | Standard step | | Follows PA standards | Up to you | Required | | Written result guarantee | No | Often available | | Accepted by buyers | May raise questions | Usually expected | The EPA recommends a qualified mitigation contractor, since lowering high radon takes specific technical knowledge. ## Key takeaways - Pennsylvania lets you mitigate radon in a home you own or live in without certification. - Anyone working on someone else's home must be DEP certified. - DIY systems often fail because of placement, pit size, fan choice or sealing. - Never put the fan in a basement or living space, and keep the discharge above the roof. - Always test after any radon work, DIY or professional. ## Frequently Asked Questions ### How much can I save doing it myself? You save labor but still buy the fan, pipe, sealant and test. Mistakes can mean redoing the work, which cuts into the savings. ### Will a buyer accept my DIY system? Some will, if the post-install test is low. Many buyers and inspectors prefer a system installed by a certified mitigator. ### Do I need a permit? Electrical work for the fan may need a permit. Check with your local code office before you start. ## Get it done right the first time If you would rather skip the trial and error, we can help. Call [(717) 356-3035](tel:+17173563035) any time for a free written quote and a same-day callback.