How Do You Keep A Post Straight In Concrete?

How deep should I bury a 10 foot post?

Dig post hole so diameter of the hole is 3 times the width of the post (i.e., the hole for a 4” wood post should be about 12 inches wide).

The depth of the hole should be 1/3-1/2 the post height above ground (i.e., a 6-foot tall fence would require a hole depth of at least 2 feet)..

Can I pour concrete in a hole full of water?

The good news is that you can pour the concrete in water. … The biggest issue with pouring concrete under water is movement. If the water is moving, it can wash away the cement paste that’s holding the sand and gravel together. But if the water is calm, then it’s not a problem at all.

How do you keep fence posts from rotting in concrete?

Caulk around the fence post baseSoak the bottom of the posts in a wood preservative containing copper napthanate, such as Cuprinol. … Place about 6 in. … Pour the concrete so that it’s above the soil level.More items…

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

How long will a post last in concrete?

5 to 10 years4 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.

What happens if you add too much water to quikrete?

Too much water can make it not mix properly, or run out of the form/hole/whatever. But the concrete will absorb exactly the correct amount of water needed for the chemical reaction.

Should pressure treated posts be set 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.

Can you put dry concrete in a post hole?

Fast-setting concrete is ideal for setting posts because there’s no mixing—you simply pour the dry concrete from the bag right into the hole, then add water. … Under normal curing conditions, you can apply heavy weight to the post (a basketball backboard, for example) after just 4 hours.

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.

How much concrete is in a post hole?

The general rule of thumb when setting a post is that the depth of the post’s hole needs to be 1/3 to 1/2 of the actual above-ground height of the post. So, six-foot-high fence posts ideally need to be buried three feet into the ground. The diameter of your post hole should be three times the diameter of your post.

Should I use 4×4 or 6×6 fence posts?

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.

Can I build an 8 foot fence?

One exception to this rule is that ornamental fences (open fences that do not visually disrupt view corridors) can typically be built higher than 6 feet. … The city will also allow an 8-foot fence to be built if it is located on or within the building set back lines (usually 5 or 10 feet from the property line).

How do you make sure new posts stay plumb while the concrete is setting?

Hold a carpenter’s level against all sides of the post to ensure it is plumb, or straight up and down. Once you are sure the post is plumb, fill the hole with concrete. Take care not to disturb the post as you add the concrete. Check the post again with the level to make sure it is still plumb, and adjust if necessary.

Can I mix quikrete in the hole?

Pour the QUIKRETE® Fast-Setting Concrete Mix dry from the bag into the hole until it reaches 3 to 4″ from the top. Pour water onto the dry mix and allow it to soak in. … This will take about one gallon of water for each 50 pound bag depending on soil conditions.

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

about 12 inches squareFor a 6×6 post, the diameter of the holes should be about 12 inches square. As a rule the width of your post hole should never be less than 10 inches. You want holes deep and wide enough to easily support a standard 4×4 post.

Is quikrete as strong as regular concrete?

Quikrete Fast-Setting Concrete Mix is easy to use — just add water — and it sets in 20 to 40 minutes. … That’s stronger than the concrete used for foundations on most homes.

How do you keep a pole straight in concrete?

Place the pole into the hole and fill with a cement mixture of 3 part stone, 2 part sand and 1 part cement. Use wooden braces to keep the pole plumb until the cement hardens.

How do you brace a post for concreting?

Attach angled 2 x 4 braces to two adjacent sides of the post using one screw for each brace. Drive a stake into the ground near the lower end of each brace. 4. Use a level to position the post plumb (perfectly vertical), checking on two adjacent sides with the level, then fasten the braces to the stakes.

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 a pressure treated post last in the ground?

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. But young pressure-treated decks, many less than 10 years old, are being shoveled into landfills.