If any cracks are present you can always seal up with chalk. Ok, break is over and we’re ready to start back reducing radon in our home. Planning and layout for the radon3" hole cut out mitigation system should already be done, so let’s start placing our pipe, be sure to dry fit your cut pieces before gluing, I know this is aggravating but will save a lot of time and some money if done right the first time. All pieces have to be glued; otherwise radon may seep out of the pipe into your home. All verticals run are easy, just go straight up.When going through the floors or dry wall make sure you will not be cutting into any plumbing or wiring, the cutting works best if you the hole saw made for the diameter of the pipe you are using + a little, so if you’re using 3” piping get a hole saw that a little bigger thRadon pipe ventilationan 3”. When running the radon piping horizontal it has to be sloped back toward the radon suction point. Condensation will be created when the cool air from underneath your basement floor hits the hot air in your attic or outside air, condensation forms inside the pipe. Sloping the pipe towards the pit lets that condensation run back into the soil in the pit, not sloping the pipe will leave the water standing, possibly causing noise or airflow blockage. The pipe needs to be supported every 8 feet vertically and every 6 feet horizontally. Once all the piping has been ran up to the attic.