Quick Answer: How Do You Keep Fence Posts From Rotting In Concrete?

Does wood rot in concrete?

When wood is kept in direct contact with concrete, the moisture in the concrete will be drawn up into the wood, and after a period of time the wood will rot.

when concrete is freshly placed it begins its drying process.

when wood is in contact with the concrete, the concrete leaches out its water into the wood..

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

40 yearsTherefore, if you are in the look for proper construction materials for your home, then consider investing in pressure treated wood. According to Forest Products Laboratory and other research agencies, pressure treated poles in the ground can stay up to 40 years without any signs of rot.

How long will pressure treated posts last in concrete?

5 to 10 years5 Answers. A PT post will last a long time in concrete, maybe 5 to 10 years in soil alone. I suggest you embed the post in concrete, trowel a peak around the post so water runs off, and don’t let the PT post come in contact with the ground.

Will fence posts 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. … First, the posts should be set on top of a bed of coarse gravel 3 to 6 inches deep, so the base of the post is in contact with the gravel.

How do you keep wood from rotting in the ground?

Tips for Preventing Wood RotAlways use decay-resistant or pressure-treated lumber for decks. … When building an exterior project with wood, stain or paint all sides of each lumber piece before assembly.Don’t lean anything against your siding, such as old plywood, tools, and ladders.More items…

How long will wooden posts last in concrete?

5-8 yearsThe guy who originally put them in says they typically ‘go’ between 5-8 years and is recommending I replace with concrete posts at considerable extra cost.