DEER FENCE INSTALLATION: FINISHING TOUCHES 2
HOW TO INSTALL A McGREGOR DEER FENCE: ANTI-JUMPING INSURANCE
Remember, 99 percent of the time deer will not try to jump a 7-foot fence. However, should you feel deer are likely to jump your fence (white-tail deer jump higher than black tail deer)–because it is out in the open, or it crosses a deer path, or you have “witnessed” it being jumped before from the outside, then it pays to take out “anti-jumping insurance”. There are essentially two ways to exclude jumping deer. The less effective is to raise the height of the fence. You can add any reasonable amount of height you like to a jump-prone length of fence by combining 9-foot or 10-foot angle-iron deer fence posts with 4-foot extensions (the extensions come with nuts, bolts, and washers for purposes of attachment). Situate these extended angle-iron posts up to 30 feet apart and string 11-gauge monofilament line at roughly 6-inch intervals, using strong 8-inch nylon zip-lock ties passed through the holes in the posts to attach the lines to the posts. Once you have drawn these lines reasonably taut and have secured them well, you will find that you have effectively added up to three-and a half feet to the height of your fence.
A better way to stop jumping deer is to use round one and five-eighths inch diameter black galvanized steel posts. If these are already in place, well and good. If they are not, place them at intervals of 30-40 feet along the vulnerable run of fence. Set these posts at an appropriate depth and tie them into the established fencing with zip-lock ties.
On top of each round post, place a cap with a 13-inch notched steel bracket. Place this cap so that its bar extends upward and directly outward (toward the jumping deer), rising at an angle of 45 degrees. Then attach an 11-gauge monofilament line to the row of outward-projecting bars. Do this by setting a length of filament into the lowest of several notches on the top of the bracket, wrapping the filament around the bracket, tying it down with a zip-lock tie, and going on to the same notch on the next bracket and repeating the process. Do this until the monofilament line is connected to all the brackets and then go on to the next notch up until all the notches are occupied and the monofilament lines proceed outward at no more than 6-inch intervals to the ends of the 13-inch brackets.
This arrangement, which can be used with both polypropylene and metal hexagrid deer fencing, strongly discourages jumping–even by white tail deer–because any white tail or other deer that jumps up to explore or go over the fence will be thrown back by something coming out sideways that it simply cannot see. The resulting effect is daunting–so daunting that the system appears 100 percent effective. That is, we know of no case where any white tail deer or other deer has ever jumped over a fence reinforced this way.