My garage door when fully closed has a gap approx. 1/4 - 1/2 in on one side. I recently replaced the weather-striping and the gap is still there. I adjusted the springs on the door. The gap will disappear but only after the springs are adjusted to the point where the door will no longer lift. The best adjustment I can get is the small gap on one side. Any advise on where to start, the door mechanism itself or the slab?
They sell oversize weather stripping for some doors. Try searching the internet for a garage door company that supplies many different sizes of weather stripping.
Try these guys
http://www.garage-doors-and-parts.com/garage-door-weather-seal.html
s.cowie:
If this is an 8 ft. door, you have to temporarily remove the weatherstripping/rubber/neoprene door gasket & cut a piece of 2 X 4 the LONG WAY starting at one end, draw a line all the way along the 2 X 4 from zero on one end to 1/2 inch or 3/4" on the other & use a circular saw to cut this long wedge.
Attach it to the door with rust-proof 1" deck screws or equivalent with the thick end of the wedge on the side with the gap, so as to compensate for the gap space.
Then re-attach the weatherstripping/neophrene/rubber gasket on the bottom.
Be EXTREMELY CAREFUL when making this cut with a circular saw--use saw horses & clamp the 2 X 4 to the saw horse with wood or metal clamps---keep fingers away from the blade.
A table saw is much easier & safer to use for this cut.