I have a radon remediation system in my basement. The installer told me the only cracks in the basement floor that needed to be sealed were the ones within 5 feet of the PVC vent coming out of the slab. He explained that all the other minor cracks were actually good for operation of the system because they allowed replacement air to enter under the slab as the remediation system vented out all the radon. He explained that if everything was sealed tight the unit would create a mini vacuum under the slab and would shorten the life of the venting motor.
I have heard recently of installers that seal every little crack and crevice in the floor, with the explanation that the system is useless if radon can Ã¢â‚¬Å“leakÃ¢â‚¬ thru floor cracks. The only exit should be the vent.
Does anyone have an opinion on what is the right approach, seal cracks or not? I have searched the net looking for official remediation solutions to see if these issue is addressed but I havenÃ¢â‚¬â„¢t had any luck.
Thanks for your opinions.