Moisture and rot are the largest threat to wooden fences. Stain can help your wood fence last 15 to 20 years, but only if you choose a stain with waterproofing qualities or add a sealant. Oil-based stains create a thicker moisture barrier than water-based stains, though both are mold and mildew resistant. You’ll generally need to re-stain your fence every one to eight years to get full protection.

Regular staining, sealing, and inspecting for rot or insect damage prolongs fence lifespan.

When deciding between fence post foam and concrete, the best choice depends on your specific needs and priorities. Concrete is generally considered stronger and more durable, making it the preferred option for heavy, load-bearing posts. However, expanding foam offers several advantages, such as being more eco-friendly and curing much faster. For smaller fences or those made with lighter materials like vinyl or wire mesh, post foam is a good alternative. While concrete is more affordable, it is also harder to work with and has a longer curing time.

Corrugated metal is a strong, long-lasting material. A corrugated metal fence will typically last several decades, and the metal panels themselves may last for 40 to 60 years. The main thing you should be concerned about is the fence posts. Wood fence posts will last about five years if you purchase them untreated or about 15 years if you treat them after installation. Keep an eye on your posts and look out for insect damage and rot.