Question: How Long Will Pressure Treated Posts Last In Concrete?

How can I make pressure treated wood last longer?

You can enjoy pressure treated decks for a very long time.

All it takes is a little extra care during installation and a yearly dose of maintenance.

Keep the wood stable by applying a coat of water repellent treatment onto all surfaces before installation..

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. … The concrete at the top should be sloped away from the post to grade level to avoid water pooling around the base.

How do you keep fence posts from rotting in concrete?

Caulk Around the Fence Post Base Apply high-quality exterior acrylic latex caulk, or silicone specifically designed to adhere to concrete, at the base of the post.

Do fence posts rot in concrete?

Unlike wooden fence posts concrete is not a degradable material and cannot be penetrated by rot or insect attack which is why people choose to opt for concrete over timber.

What is the life expectancy of pressure treated wood?

15 yearsPressure-treated lumber will need to be replaced every 10–15 years due to the decomposition of its organic materials.

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.

Can I set deck posts without concrete?

Plastic piers require the digging, but unlike footings, there is no concrete involved. The pier is put into the hole and attached the post, giving you your deck without wasting hours installing footings.

Can you pour concrete around existing deck posts?

the concrete around the post at the top (slab or patio) will cause two problems, 1 it makes a weak spot that will crack or 2 as the cocrete expands and contracts with the weather it could shear the post and cause the structure to fail. Yes, I agree.

Do pressure treated posts rot in concrete?

Pressure-treated wood will rot in concrete when exposed to wet conditions such as trapped water. In optimal conditions, pressure-treated wood set in the earth may last as long as 40 years.

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

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

How long will a 4×4 post 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.

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.

Should I use 4×4 or 6×6 deck posts?

4×4 post will be fine. I have built many decks for new homes with them. 6×6 is more sturdy of course and will not twist as easy, but for structure purposes, 4×4 will be fine. I would just not go more then 10′ apart with them.

Can I pour concrete against pressure treated wood?

YES. Any exterior concrete that is in contact with earth may wick moisture. Thus, it is required to place pressure treated wood directly against the concrete if one wishes next to build off that concrete with untreated wood.

What happens if you paint pressure treated wood too soon?

But, the catch is that you should not paint treated wood too soon after it has been purchased. … If you paint treated wood while it is still wet, your coat of primer or paint will most likely be rejected by the water-borne chemicals slowly bleeding their way out of the lumber.

Is it OK to leave wood in concrete?

Since wet concrete exerts considerable pressure, the wooden form should be strong and anchored to the ground. … Forms can either be removed after pouring concrete to let dry, or be left in the concrete as permanent edging. If you are planning to leave the wood in place, use pressure-treated lumber.

Why deck posts should not be set in concrete?

A deck post should always be placed on top of footing, not inside concrete because it can break. … Concrete tends to absorb moisture and wood expands when it gets wet, so these two factors combined will result in the wood breaking the concrete.

Should pole barn posts be set in concrete?

Also, be aware that simply setting posts in concrete will not prevent rot. The wood won’t be in contact with the ground, but moisture is absorbed by the concrete and pulled up into the wood. Over time, rotting will occur.