Can you build a deck over uneven concrete?

Lay the deck frame over the uneven concrete surface. If you’re applying the deck directly over a concrete surface, use the bricks and temporary support beams to lift any sagging portions of the frame. If you’re constructing a raised deck, adjust the frame’s height and evenness using temporary support beams.

Do I need concrete footings for a deck?

Decks and other permanent structures require deck supports and footings made from structural strength concrete mix. NOTE: it is important to check local building codes for construction requirements in your area; these requirements will include minimum diameter and minimum depth of the footings.

How do you pour a deck footing?


  1. Lay two long straight 2x4s on the deck, allowing them to extend out to the center of the two footing holes.
  2. Hang a plumb bob from the end of one 2×4. …
  3. Use a pointed shovel to scribe the dirt around the form.
  4. Move the form out of the way and dig the footing hole down to the frost line or 4 feet deep.

Can you put a deck post in concrete?

There are several ways to set deck posts; we recommend attaching the posts to concrete footers above the ground. This helps to prevent wooden posts from rotting. Set footers a minimum of 6” below the frost line for your area to prevent movement during freezing temperatures.

How do you build a deck over existing concrete?

Quote from the video:
Quote from Youtube video: But in order to keep these from getting too high we're going to have to notch our joists. Around these concrete steps to do that we're going to use a technique called scribing.

How do you build a low deck over concrete?

Quote from the video:
Quote from Youtube video: And now we're just gonna frame over the whole thing. And our decks gonna sit right on top of here it's perfectly the code very easy to do but make sure if you're doing it your slab is in good shape.

How high can a deck be without footing?

If it’s 6 feet or less with a proper post to beam and joist bracing, then you can install a floating deck without the hassle of having to install concrete footings.

Can I build a deck directly on the ground?

Yes, you can build a deck directly on the ground, but with some conditions. A deck on the ground must be built with ground-contact wood, and the substructure needs to be adapted for minimal height. Even though technically a ground level deck is elevated up to 24”, here we will discuss decks built less than 8” high.

Do concrete deck blocks sink?

The deck blocks can sink if the soil under them erodes for some reason or the weight is unevenly distributed. That’s why it’s a good idea to use more than less.

How long will a pressure treated post last in concrete?

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.

Do 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.

Should you put concrete around deck posts?

Quote from the video:
Quote from Youtube video: Fast-setting concrete can be used for setting wood or metal posts. It can also be mixed with water and poured around a post as in traditional post setting applications.

Can you sprinkle quikrete over gravel?

Cement mix might work in some cases over an existing gravel driveway. Laying a concrete driveway over an existing gravel one is possible, but it is not generally recommended. The kind of gravel that is intended to go under cement is typically a smaller grade than what is used for gravel driveways.

How long does it take for quikrete high strength to cure?

After 7 days, the concrete reaches about 2500 psi. But if you want full strength Quikrete, which is over 4,000 psi, you should allow concrete to cure for 28 days to reach it’s full potential.

Does concrete make wood rot?

With concrete holding the moisture against the wood, wood has no chance and will eventually lose the battle. Now you don’t have to lose all hope because it’s for certain that the concrete around the post will crack, therefore making it easy to pull out when it starts to rot.

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 do you keep wood from rotting in concrete?

Quote from the video:
Quote from Youtube video: Set their wood post on top of the gravel. And then surround it with concrete. The idea being any moisture trapped in that wood post can then leak out through the gravel.

Is it OK to put pressure treated wood in concrete?

Pressure-treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. Note that this requirement is only for exterior walls, as these may wick moisture onto the lumber.

Can wood be in contact with concrete?

Wood in direct contact with concrete, and the dampness often found there, will rapidly decay. To avoid this, use pressure-treated lumber. This is wood impregnated with decay-resisting chemicals, usually chromated copper arsenates. Pressure-treated lumber comes in standard lumber sizes and is available at lumberyards.

How long will a wood post in concrete last?

A treated 4×4 will last 20 to 25 years in the ground if the conditions in the soil and climate are favorable. That number could increase to 40 to 75 years if you install the treated 4×4 in a cement ring rather than the soil. There are a few factors that influence how long the 4×4 can last in the ground.