Review on Frost King U37H Bottom 36 Inch: The Ultimate Weather Seal for Doors and Windows by James Crofton

Be sure to measure the gap from the bottom of the door to the top of the adjustable sill before purchasing. You need at least ½ inch of space and an extra adjustment (below) the sill. For a perfect fit, measure the width of the door below; Cut the hat to this size. Then measure the width of the door jamb and cut the drip flange to that size. Cut the bottom seal to full length and slide in. Attach the cap to the bottom of the door and set the threshold. The two things I didn't like were the corner of the lip and the bottom seal. The inside and outside edges of this lid were not perpendicular to the bottom. They both leaned toward the front (outer) door. When installed, this has caused the rear (inner) edge to sag. With a little flattery from a hammer I was able to make the front (outside) almost perpendicular to the ground. If you have enough adjustments to lower the threshold, this angle might not be an issue. The second problem was the bottom seal; it slides into the lower channel too easily. When I close the door, the seal slides to the doorknob and hits the door frame. I'm going to add a drop of caulk to one end to hold it in place. All in all a good drip cap for a decent price (ten dollars).