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Radon Mitigation
Mid-Cape Home Inspection Services specialize in the design and installation
of high quality, effective radon reduction systems.
Our mitigation systems are custom-designed with regard to several special considerations. The concentration level of Radon gas to be evacuated, the size of the air-space in question, and the type of construction of the building are all factors that determine the scope of the final mitigation system.
All our systems are designed and installed in accordance with
EPA protocol and recommended standard ASTM E 2121-03
There are certain techniques that are used for almost every type of radon mitigation procedure. They include: SSD -Sub slab depressurization, SMD - Gas retardant membrane within a crawl space, sealing openings, HRV heat recovery ventilators and HP - House pressurization
Common Radon Mitigation Methods:
SSD - Sub Slab Depressurization:
Our mitigation systems are custom-designed with regard to several special considerations. The concentration level of Radon gas to be evacuated, the size of the air-space in question, and the type of construction of the building are all factors that determine the scope of the final mitigation system.
All our systems are designed and installed in accordance with
EPA protocol and recommended standard ASTM E 2121-03
There are certain techniques that are used for almost every type of radon mitigation procedure. They include: SSD -Sub slab depressurization, SMD - Gas retardant membrane within a crawl space, sealing openings, HRV heat recovery ventilators and HP - House pressurization
Common Radon Mitigation Methods:
SSD - Sub Slab Depressurization:
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Draws radon from beneath the house and vents it away from the house through pipes. This has been proven to be the most successful method.
SMD - Sub-Membrane Depressurization Ssytem:
A system designed to achieve lower sub-membrane air pressure relative to crawlspace air pressure by use of a fan-powered vent drawing air from under a soil-gas-retarder membrane that covers the crawlspace area.
Sealing Cracks & Openings
Sealing cracks and other openings in the foundation is a basic part of most approaches to radon reduction. Sealing the cracks limits the flow of radon into your home thereby making other radon reduction techniques more effective and cost-efficient. It also reduces the loss of conditioned air. EPA does not recommend the use of sealing alone to reduce radon because, by itself, sealing has not been shown to lower radon levels significantly or consistently. It is difficult to identify and permanently seal the places where radon is entering. Normal settling of your house opens new entry routes and reopens old ones.
HP - House Pressurization
This method uses a fan to create pressure differences that help keep radon from entering the house. This system is not as effective in basement areas that are accessible for storage, since opening doors reduces the pressurization of the area and allows contaminated air to leak within the living area.
HVR - Heat Recovery Ventilator
HVR Installed to increase ventilation, HRV uses the heated or cooled air being exhausted to warm or cool the incoming air. This method works best if radon levels are below 10.0 pCi/l but can be an expensive alternative. This method is usually used in crawlspace areas when restrictions make membrane installation difficult to install.
Eliminating Radon in Water
If it has been determined that your private water supply is your home's source of radon, it can be fixed. Typical systems involve an aeration process where the radon is extracted from the water by aeration and discharged to atmosphere.