Mike Conneely of Greenside Design Build walks through waterproofing a garage floor built from precast concrete planks over a finished basement. A torch-down modified asphalt membrane goes down in overlapping layers, with the seams melted together and the material run up the walls. Spray-on waterproofing at the door entrance adds a backup layer. Mike explains why he favors torch-down over EPDM, noting that it tolerates a rough substrate and resists

Watch more of Mike's full episodes on The Build Show and follow him on Instagram at the links below.. He also points out a flashing mistake at the door openings that he's correcting, since doors and transitions are where leaks most often start. A layer of rigid insulation then protects the membrane and receives the radiant tubing before the concrete pour.

Watch more of Mike's full episodes on The Build Show and follow him on Instagram at the links below.
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