One Piece Drain Sleeve
Drain Sleeve Inserts are used when the existing drain does not have a clamping ring assembly, or cannot be taken up, properly cleaned and incorporated into the new roofing system.
NOTE: Before beginning the reroof project, thoroughly clean the existing drain. Do not allow debris to clog the drain pipe. The new Drain Sleeve Insert should be lower than the new roof system surface.
Install the field membrane over the drain. Cut a circle the size of the Drain Sleeve Pipe directly over the existing drain. Following standard seaming procedures, clean the field membrane and Drain Sleeve Insert with Membrane Cleaner. Apply Rubber to Rubber Adhesive to the field membrane and the bottom of the drain inserts. After the adhesives have flashed off, apply a heavy bead of Water Cut-Off Mastic above each back up ring and at the angle change of the drain bowl and insert the drain sleeve into the existing drain. If it is necessary to mechanically faster the Drain Sleeve, use the proper length deck screws with two inch (2") or three inch (3") plates.
After the Drain Sleeve Insert has been installed, using standard seaming procedures, install a "target patch" to extend six inches (6") on all sides, past the edge of the Drain Sleeve Insert. Cut the target hole one-half inch (1/2") larger than the strainer securement ring.
Clean all seam edges with Membrane Cleaner and apply a one-quarter inch (1/4") bead of Lap Caulk. Insert the strainer ring into the drain bowl and install the strainer.
Figure 29
|