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A barbed wire fence will last an average of 15 to 20 years, but the life expectancy can range anywhere between five and 50 years. Thicker wires last longer, as do fences made with galvanized metal. If the barbed wire fence is in a climate with harsh winters and summers, it likely won’t last more than 10 to 15 years. Failing to keep up with maintenance and repairs will also shorten the lifespan of a barbed wire fence.

Deer can crawl under a fence if it has a gap of around 6 inches or more. Make sure to close all gaps at the bottom of your fence to keep deer out, and the bottom of the material should be tightly secured, or the deer will push right through it. As an added benefit, closing shorter gaps at the bottom of a fence can also keep rabbits out of your yard.

When your rolls of silt fence join together, you’ll want to overlap them to make sure they’re still as effective at keeping water out without requiring fastening together. Overlap two sections of the silt fencing so that two sheets of fabric cover the span of two posts. If you want to fasten them together, you can staple them or use a zip tie, depending on whether your posts are metal or wood. 

When deciding to replace or repair your existing fence, consider the 20% rule that fence builders reference. This rule states that if more than 20% of your fence needs repair, you should skip the repair and replace it. Additionally, if your fence is nearing the end of its life, it's often best to replace it.

Repairing the fence is a good option when you have minimal damage or damage from a specific event versus wear and tear. Your fence repair professional can assess the damage and compare the repair price with the cost of a new fence.