How Long Will 6×6 Pressure Treated Concrete Last?

What is the difference between #1 and #2 pressure treated wood?

Typically wood that is two or more inches thick is graded only for strength, denoted by #1, #2 and so on.

And because stronger lumber has fewer and smaller knots, it’s typically more attractive.

So the general rule of thumb for lumber grades is this: the lower the number, the more strength and better appearance..

Can pressure treated wood be placed on concrete?

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.

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.

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.

How big of a hole do I need for a 6×6 post?

10″A 6×6 post requires a 10″-diameter hole. Shovel a 6″ layer of gravel into the hole to provide drainage.

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.

Are 6×6 fence posts better than 4×4?

Instead of 4×4 posts, go with 6×6 posts. The extra size makes a huge difference. It’s a smart place to invest a little extra in your fence, because if your posts distort after they have been set in the ground with concrete, they are extremely difficult to replace.

How do you put a 6×6 in concrete?

Step-By-Step Instructions:Dig the post hole, making it three times the width of the post and at a depth equal to 1/3 to 1⁄2 of the above-ground length of the post, plus 6″ (right). … Pour 6″ of gravel or crushed stone into the bottom of the hole. … Set the post in the hole.More items…

What should I put between wood and concrete?

Anyplace where wood meets the ground or concrete, the lumber must be pressure treated. For additional moisture protection, a gasket or strip of closed-cell foam can be installed between the concrete foundation and the sill plate.

How long will pressure treated concrete last?

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 pressure treated wood last in water?

Pressure treated is guaranteed for 30 years in direct water contact, and mine has been in for 16 years.

Why deck posts should not be set in concrete?

When concrete is poured around a deck post in this way, the post will rot due to moisture buildup by the soil. … 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.

How can I make pressure treated wood last longer?

How do you make pressure treated lumber last longer? Applying a sealant to the wood is the best choice no matter how the wood is used. Filling all nail and screw holes is another way to extend the life of the wood. Applying concentrated treatment chemical to any cut ends will increase the life of the wood.

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 .

Will wooden 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.

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?

Tamp down the gravel. You can use concrete, if desired, but the moisture in the concrete can sometimes cause wooden posts to rot more quickly, while the gravel allows water to drain quickly away from the fence post and into the soil.

How long will a 4×4 post last in concrete?

But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills. Click to see full answer. Similarly one may ask, how long does a 4×4 post last? Depending on the species, cedar may last for about 15-30 years, spruce may last for about 4-7 years, and pine may last for about 5-12 years.

How many bags of concrete do I need for a 6×6 post?

As I recall, a 60# bag of concrete is about . 5cf, so you’d need 3 bags per hole.