Hi to all, Is anyone out there familiar with installing Henderson sectional doors? I just finshed installing one on my garage but it's operation is puzzling me. This is the TOF version with tensioning springs above the door.
The door raises okay but gets to a point where the tensioned ropes are at a minimum length way before the door is at the limit of it's rearwards travel, in fact the door is not fully open. Once you push the door past the point where the ropes are at minimum length, (i.e. maximum amount of rope on the tensioned pulley wheel), you are then fighting against the springs. If you push the door back far enough to be horizontal it falls back to the point where the ropes are at minimum length as soon as you let go of it. Because of this I am losing at least 6" of much needed headroom at the door. Not sure if I've described this well, but anyone familiar with this type of door will probably know what I'm on about.
I intend motorising the door, and this will overcome the problem because the motorised mechanism will hold the door back against the springs okay. Meanwhile I am wondering if I have got something wrong or is this just the way a door with front mounted springs works. I can see that a door with a rear mounted spring option wouldn't have this 'feature'.