Radon Sump Dome Sealing

Specialized Sump Dome Sealing Services

We deliver airtight protection that keeps radon, moisture, and odors out of your living space.

Airtight Lid Install

High-impact polycarbonate lids, industrial gaskets, and silicone seals that lock out radon permanently.

Secondary Sump Pit Cover

Reinforced secondary covers that maintain system pressure and prevent suction loss in high-risk basements.

Retrofit & Repair

We fix leaks, cracked covers, and old penetrations using radon-resistant materials and precision grommets.

Why Seal Your Sump Pit?

A sump pit is a direct opening into the soil beneath your foundation. Without a professional seal, it acts like a vacuum for radon gas, moisture, and odors.

Health Protection

Reduce radon exposure and keep your indoor air safe for the people you love.

Energy Savings

Prevent conditioned air from escaping through the pit, easing the load on your HVAC system.

Moisture Control

Trap soil moisture to reduce musty odors and basement humidity.

What You Get

Clear viewing ports
Cord & pipe grommets
Reinforced weight-rated lids
Vacuum-tight sealing

Schedule Inspection

Frequently Asked Questions

Why should I seal my sump pit?

Your sump pit is a direct opening to the soil. Without an airtight seal, it pulls radon gas into your basement. Sealing it can reduce radon levels significantly.

Can I service my sump pump after it's sealed?

Yes. We use removable bolts and silicone gaskets that allow for maintenance, plus clear viewing ports for inspection.

What is a secondary sump cover?

It is a reinforced barrier used with the primary seal to maintain pressure in active radon mitigation systems.

How long does installation take?

Most installs are completed in 2-4 hours, including cleaning the rim and sealing all pipe exits.