Quick Answer: How Long Will A Pressure Treated Post Last In Concrete?

What should I put between wood and concrete?

on top of a foundation wall, there is a barrier (in cold climates, that’s a thin foam called “sill seal”) that separates the concrete from the wood sill.

the wood sill should be pressure treated to resist decay..

How many bags of concrete do I need for a post hole?

Mix two 50lb bags of concrete with water in a mixing tub or 5-gallon bucket. Add concrete into the hole and around the 4” x 4”. Depending on your climate, let concrete set up for 24 – 48 hours.

Will pressure treated wood rot in concrete?

A: Actually, your point is well taken. 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. … Concrete should be poured around the post – no concrete under the post.

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 do pressure treated fence posts last?

With that simple treatment, the average life of the lodgepole posts may exceed 50 years, and Douglas-fir and black cottonwood posts may each average about 40 years. A similarly treated series (88) of Douglas-fir posts with bark left on the upper portions should last about 36 years.

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.

Should you use concrete for fence posts?

Setting Fence Posts in Concrete Concrete is the most secure material for setting fence posts, especially if you have sandy soil. Gravel may be okay with dense, clay-heavy soil, but in looser soil, concrete is the only thing that will truly keep your fence posts stuck in place.

Why is there a shortage of pressure treated lumber?

The coronavirus has caused a shortage of lumber and pressure-treated wood. Lumber mills in the U.S. slowed their production or stopped altogether during the pandemic, resulting in reduced supplies.

How long does concrete fence post last?

25-yearConcrete fence posts require no after-sale treatment and require minimal upkeep for the duration of their 25-year lifespan. The main challenge is to ensure water does not get into the post’s foundations, as this freeze and expand, loosening the fence post.

Can pressure treated wood sit on concrete?

Wood in direct contact with concrete, and the dampness often found there, will rapidly decay. To avoid this, use pressure-treated lumber. … This indicates that the wood contains a quarter of a pound of preservative per cubic foot, which is sufficient for use against exposed concrete, outdoors as well as in.

Is it better to stain or paint pressure treated wood?

Because of the pressure-treating process, exterior paint is less likely to adhere to pressure treated wood and more likely to peel. Some experts advise staining or sealing over painting, but paint can be successfully applied by following extra precautions.

How do you keep fence posts from rotting in concrete?

The ideal solution is to eliminate contact between soil and wood. Using a metal post anchor set in concrete is probably the most effective method for achieving maximum longevity. To help keep the post from wicking water, choose an anchor that spaces the post bottom away from the concrete.

Can you put pressure treated wood directly on the ground?

Pressure-treated wood is softwood lumber, typically southern yellow pine, that’s been chemically treated to resist rot, decay and termites. Lumber treated to “Ground Contact” has a high chemical retention level and can be placed directly on or in the ground with better protection against rot or decay.

Should a wood fence touch the ground?

In most applications, a wood fence should be installed at least two inches off the ground. Your posts and rot boards (if you choose to install them) should be the only fence components that contact the ground. Wood pickets should never touch it.

How long do you have to wait to seal pressure treated wood?

It is important to wait for the wood to dry before sealing a new deck, but at the same time, you don’t want to wait too long. Drying can take several months. We recommend beginning to test the wood around 90 days after your project is completed, but this is just a general suggestion.

Is it necessary to seal pressure treated wood?

However, most pressure-treated wood should have periodic sealing against moisture, preferably every year or so. Although the wood is resistant to rot and insect attacks because of the pressure treatment, it can warp, split and develop mildew if not protected from the effects of water.

Is 2 feet deep enough for fence posts?

The minimum depth that you should dig your fence post holes for panel sections is 2 feet. A general formula is to dig the holes one-third to one-half of the post’s aboveground height. The deeper you dig the holes, the more stability your fence has, but you must also purchase longer posts.

Why can’t you use pressure treated wood inside?

Some have also asked, after they’ve found pressure-treated lumber installed inside their homes, if there is any danger in having it indoors. The answer is no. … The reason lumber is treated is to protect it from exterior elements that might cause rot, decay or termite infestation.

Which lasts longer pressure treated or cedar?

Length of Life. Cedar decks last 15 to 20 years, compared to 10 to 15 years for pressure-treated wood. This depends on several factors, including: quality of the PT process.