I would like suggestions for how to properly seal gaps or penetrations in the filter fabric that is surrounding the foundation drainage system of a home.  

Our contractor is placing our main SDR 35 yard drainage pipe inside the gravel “burrito” surrounding our foundation drain (to avoid having to dig a separate trench for it).  

We will have 5 catchment basins in the yard, with individual drain pipes joining the main drain pipe. These 5 side pipes will need to penetrate the filter fabric to join the main line. The contractor just plans to slit the filter fabric all the way up in order to join the side pipes to the main one.

These 5 open slits in my filter fabric leaves me very concerned that our shrink-swell clay subsoil will eventually seep through the slits and clog up my foundation drain.

Of course, we’ll also have penetrations through the fabric for our sewer, water, and other drain lines.  Any suggestions on how we can better seal these slits in order to reduce that possibility? Or is this not an issue? Thanks!