INSTALL GUIDES: Radon Barrier

A radon barrier is a crucial component in reducing radon levels in buildings, particularly in areas where radon gas infiltration from the ground is a concern. Radon is a radioactive gas that is naturally occurring and can pose serious health risks, including lung cancer, when it accumulates indoors at high levels. Implementing a radon barrier helps to prevent radon gas from entering the building.

Combining radon barriers with insulation is a strategic approach to ensure both energy efficiency and protection against radon gas infiltration. This dual-purpose installation is particularly useful in basements and crawl spaces where radon entry is a concern.

Use: SmartSHIELD Under Concrete or Reflective Bubble White Poly

How To Insulate With A Radon Barrier

Floor:

1. Do the same installation as underneath the concrete slab (see  Radiant Heat in a Concrete Floor). Just make sure to seal it along the wall.

Exterior Wall:

1. Install SmartSHIELDUnder Concrete or Reflective-Bubble-White Poly, white side against the wall, with a multi purpose adhesive. Seal the seams with under concrete tape. Be sure to properly seal with caulking at the bottom and at ground level on the foundation wall.

Benefits of Radon Barrier Insulation :-

1. Radon Protection: Prevents radon gas from entering the building, reducing health risks.
2. Energy Efficiency: Enhances the thermal performance of the building by reducing heat loss or gain.
3. Moisture Control: Helps to control moisture, preventing mold and mildew growth.
4. Improved Indoor Air Quality: By blocking radon and improving insulation, indoor air quality is significantly enhanced.

Installation Process :-

Materials Needed :

• Radon barrier material (polyethylene sheeting, foam boards, or spray foam)
• Insulation material (rigid foam, fiberglass, etc.)
• Sealing compounds (caulk, sealants)
• Tape (for sealing seams)
• Utility knife or insulation cutter
• Measuring tape
• Roller or squeegee (for smoothing out the barrier)
• Safety gear (gloves, mask, goggles)

Step-by-Step Guide :

1. Preparation:

   • Inspect the Area: Ensure the subfloor or foundation is clean, dry, and free of debris. Repair any cracks or damage.
   • Measure: Measure the area to determine the amount of radon barrier and insulation material needed.

2. Installing the Radon Barrier:

   • Lay the Barrier:

     • Unroll the polyethylene sheeting or place the radon barrier layer over the entire area. Ensure it covers all potential entry points for radon gas.
     • Overlap seams by at least 12 inches to ensure complete coverage and minimize gaps.

   • Seal Seams:

     • Use tape specifically designed for radon barriers to seal all seams and overlaps. Ensure the tape adheres well to the barrier material.
     • Apply pressure with a roller or squeegee to ensure a tight seal.

   • Seal Penetrations:

     • Seal around any pipes, vents, or other penetrations with appropriate sealing compounds. Ensure a tight and durable seal to prevent radon entry.

3. Installing the Insulation:

   • Rigid Foam Insulation:

     • Cut foam boards to fit snugly between floor joists or on the foundation walls.
     • Secure with adhesive or fasteners. Tape seams to ensure an air-tight barrier.

   • Spray Foam Insulation:

     • Apply the foam directly to the radon barrier surface, covering the area evenly. Ensure a consistent thickness to achieve the desired R-value.

   • Fiberglass or Other Insulation:

     • If using fiberglass or other types of insulation, place it over the radon barrier or between the framing, ensuring it fits snugly and covers all areas.

4. Vapor Barrier (if needed):

   • Install Vapor Barrier: If required, install a vapor barrier on the warm side of the insulation to prevent moisture from entering the insulation and condensing.

5. Interior Finishing (if applicable):

   • Drywall Installation: Install drywall or other finishing materials over the insulated area.
   • Seal Gaps: Ensure all seams and gaps are sealed to maintain an air-tight envelope.

Combining radon barriers with insulation is an effective way to ensure both energy efficiency and protection against radon gas infiltration. Proper installation of radon barrier insulation involves careful preparation, sealing, and placement of both the radon barrier and insulation materials. By following the correct installation procedures and regularly inspecting the area, you can create a safe, comfortable, and energy-efficient living space that minimizes radon exposure and maintains excellent indoor air quality.