Posted By Nashvegas on 02 Apr 2016 11:20 AM
Lots of good comments. Thanks everyone. For snapping a chalk line, that could be done before I lap up the plastic. 6 mil should allow the line to be visible, especially in done in black chalk.
The engineer at this time has simply designed the radon line as a perforated line down the center. The drain is on the exterior. We only get 10" of moisture a year here, so sumps are not used.
A good point is raised about why radon collection is not done on deep walls, but that should be solved by the waterproofing, especially if peel and stick. That's a lot thicker than 6 mil.
I'll discuss with the concrete guy about Form a Drain. The footers are engineered as well right now are 6 foot wide, 3 foot deep with tapered sides and a bunch of steel. The original engineer died ( yeah the project has been in the works for a while) and I'll have a new one reviewing the design
Consider lapping the poly down to the footing rather then up to the ICF.