Full detail Bypass system require high space(at least 10" ) from top of the door to the ceiling,pls check your openning space before order. The gap between two doors are 2" based on the door thickness40mm(1 3/5") ,we don't have better way to reduce this gap. Customers can use thickness 45mm(1 3/4") door panel to reduce a little. Our suggestion is to make door panel more wider than openning(openning/2+4") to cover the sight between two door's gap. Track had been pre-drilled 16" apart holes,can be used for 16" apart studs wall. The bypass system need drill 3 line holes on the wall.It's very important to double check the level to make all of them in same height. Door panel need to pre-cut a groove(Width 3/10";Height 1") ,pls let your door maker finish this job when you order the door. How to install bypass bracket How to install barn door hardware: Step1:(Inner door) Drill holes on the wall H is door panel's height,H+43MM(1-7/10") is the place we need drill holes for track to tight screws. Step2: Adjust stop's location,then tight the track on the wall with spacers. Step3: Drill holes on the door panel (see photo manuel step 3) and fix the wheels. Step4: The round dics are anti-pad,they can reduce the gap betweem door and track in case wheels jump off,pls definitely use them(any place on the top of the door and under the track) Step5: Hang wheels on the track. Step6: Bypass bracket's waist-shaped hole is on same leve as inner track,so aim the waist hole at inner track's hole to find 2 upper holes location on the wall. Drill holes on the wall,and tight screws. Step7:Fix outter track on the bypass bracket with spacers. Step8:Hang outter door on the track and tight anti-pad Step9: Install floor guide on the floor under the groove of the door panel Gallary for reference Read more