Radon can accumulate in some places where ventilation is inadequate such as in an underground mine.
Radon basement or first floor.
2 5 upstairs bedroom level 4 5.
What doesn t help is that pressure differentials from temperature weather and building mechanical systems ventilation and exhaust can help draw in more radon gas.
The highest concentration of radon tends to be found in the basement or on the first floor.
I have seen similar results in other homes including my own 1820 s farmhouse which had radon level of 17 pci l in the unfinished stone wall and dirt floor basement.
However you will still need a radon mitigation system if there are elevated levels o radon in your home.
But for two story homes the median radon levels at first and second floors are 51 and 62 of the basement level respectively.
This article should answer the question of whether or not you should seal your basement floor to protect against radon.
Another example we had in deerfield was 14 0 in the basement.
Surprisingly we find that the second floor typically has more radon than the first.
This pattern has been repeated all over chicagoland in various homes.
Sealing your basement floor is an excellent first step.
If your furnace or duct runs are located in your basement or crawlspace anytime the furnace fan runs for either heat or air conditioning the radon level on the first floor is often the same as it is in the basement or crawlspace.
4 8 in the office above the crawl space.
As a matter of fact homes built on a slab to not have the buffer of a basement or crawl space to absorb and dissipate radon gas before it enters the living area of a home.
And 7 0 in an upstairs bedroom on the second floor.
Radon is a whole house issue.
Caulking basement floor cracks coating basement walls or floors with waterproofing compounds sealing the tops of open drains installing caps on sump pump holes and covering bare crawlspace floors with plastic are a few techniques that can dramatically lower radon levels.
With a typical home and forced air heating radon levels on the upper floors will be very roughly about 40 less than in the basement.
There is truly no single style of home that is not prone to radon gas and potentially highly dangerous levels.
This is because the neutral pressure plane is typically about halfway up the wall on the top floor.
The unfinished basement radon level was slightly above 4 pci l the first floor was lower at just above 2 pci l and one of the second floor bedrooms tested at above 8 pci l.
Radon enters buildings through cracks in the foundations and or basement walls unsealed joints and utility chases.
What have you been told.
Sealing radon out can be the simplest solution.
According to the iowa residential radon lung cancer study 2000 the median first floor radon concentration in one story homes is on average 60 of the basement level.
