Question: How Do You Keep Wooden Fence Posts From Rotting?

How long will a wooden fence post last?

While treated timber posts can last from anywhere between 10-15 years, untreated timber may need replacing in under 5 years.

What’s more, rotting, splitting and warping (where the post expands upon water absorption) are all very common occurrences for wooden fence post systems..

How long will a 6×6 post last in concrete?

40 yearsThe treated post that are rated for ground contact are guaranteed for 40 years.

Why do fence posts rot at ground level?

Fence posts rot where the post exits the soil. … of soil contains millions of microbes. The soil builds up around the base of the post and acts like a sponge to retain moisture. The moisture and soil is fuel for fungi and the oxygen fuels the rot.

How do you stop wooden fence posts from rotting?

Treat the Post With Preservatives Soak the bottom of the posts in a wood preservative containing copper napthanate, such as Cuprinol. Note: Available at some paint stores and home centers, this wood treatment is specifically designed for in-ground applications.

Will a wood post rot in concrete?

Simply setting the posts in concrete does create a condition that will accelerate rot in the bottom of the posts. With pressure-treated posts, the rot will be slow. … This allows any moisture that gets between the concrete and the bottom of the post to percolate through the gravel and away from the bottom of the post.

How do you repair damaged concrete fence posts?

Temporarily remove wooden panel, break away all loose/flaky post material, build a wooden mould around each post to replicate original profile, fill with fresh concrete, leave to set. Then coat each post to reduce/prevent future frost damage.

How long will a pressure treated post last in the ground?

3) A deck built with pressure treated wood will last a long time. Promotional literature promises lifelong performance for pressure treated wood. The Forest Products Laboratory and other research groups have shown that treated wood stakes placed in the ground for more than 40 years remain rot-free.

How long will 4×4 post last in the ground?

If you find the RV posts I mentioned earlier, they are steel, treated and when put in concrete will last 25 years or more. It will not last long (7 yrs max) if the bottom of the post is wet. If you place stone at the base of the post, it should last 20+ yrs.

Should wood fence posts be set in concrete?

Concrete is the most secure material for setting fence posts, especially if you have sandy soil. … Using premixed concrete rather than dry concrete will ensure ultimate security. While concrete is sturdy, it lacks the drainage of gravel and can trap moisture, ultimately leading to rot.

What should I put between wood and concrete?

In most cases, either pressure-treated lumber or naturally durable lumber (defined by the IRC as the heartwood of redwood, cedar, black locust, and black walnut) is acceptable. In some cases, separating wood from concrete with a water-impervious membrane or vapor retarder is all that’s required.

Will pressure treated wood rot if buried?

Pressure-Treated Wood Makes the Grade Pressure-treated wood in contact with the ground needs the most protection, and will rot in just a few years if you use the wrong grade. … If your wood will touch the ground or be buried, you should get the highest grade you can, up to .

How do you preserve wooden fence posts?

Set the wooden fence posts in a cool, dry area with plenty of air circulation so the wood can dry. … Brush the bottom third or bottom half of the fence post with waterborne copper naphthenate, a wood preservative that is free of arsenic and chromium.More items…

How long will Oak Post last in the ground?

about 20 yearsIn fact, a few weeks ago, I milled some 16′ white oak posts for my new sawmill shed and put them in the ground today. I expect they will last about 20 years or so.