How to Use a Laser Level for Deck Posts: A Step-by-Step Guide for Perfectly Aligned Decks

Getting started with building a deck can be a daunting task, especially when it comes to ensuring that your deck posts are perfectly level. Uneven decks can be unsightly and unsafe, so it’s important to get this step right. Fortunately, using a laser level can simplify the process and make it less stressful.

In this blog post, we’ll dive into the benefits of using a laser level for deck posts, how to use it effectively, and some tips and tricks for achieving a perfectly level deck. So grab your laser level and let’s get started!

What is a laser level?

If you’re planning on building a deck, ensuring that your posts are level is essential for safety and stability. A laser level can be a useful tool for achieving this. Essentially, a laser level emits a continuous beam of light in a straight line, which can be used as a reference point for measuring height and ensuring levelness.

To use a laser level for deck posts, start by placing the level on a stable surface, such as a tripod. Then, point the beam at the location where you want your deck post to go. Adjust the height of the level until the beam lines up with where the post should be.

Then, place the post in the location where the laser is shining. Repeat this process for each deck post, ensuring that each one is at the correct height and level. By using a laser level, you can save time and ensure accuracy when building your deck.

Definition and Types

A laser level is a tool used to ensure that surfaces or structures are level or plumb. It works by emitting a laser beam that indicates a straight line which is used as a reference point. This device is often used in construction, carpentry, and engineering disciplines since it provides a significant advantage over traditional methods such as bubble levels.

Laser levels are available in different types including dot, line, rotary, and cross line. Dot laser levels produce a single point of reference, while line laser levels project a horizontal or vertical beam. Rotational laser levels emit a level line that rotates around a room, while cross line laser levels combine both vertical and horizontal beams.

Each type of laser level has its unique features that make it suitable for specific applications. In summary, a laser level is a highly useful tool designed to make leveling easier and faster while ensuring accuracy and precision.

how to use a laser level for deck posts

Advantages of Using a Laser Level

A laser level is a modern piece of equipment used in construction, woodworking, and other industries that require precision and accuracy in measurements. It projects a laser beam onto a surface, creating a straight line or other patterns, helping workers achieve accurate results. The main advantage of using a laser level is its high level of precision, which makes it ideal for projects that require straight lines.

It also saves time and effort, as it eliminates the need to measure and mark lines manually. Additionally, it can work over long distances and on uneven surfaces, ensuring a consistent result. Whether you are a professional or a DIY enthusiast, a laser level can make your work easier, faster, and more accurate, thereby increasing your productivity and efficiency.

So, if you want to take your craftsmanship to the next level, consider investing in a quality laser level, and enjoy its numerous benefits.

Preparing the Deck for Post Installation

If you’re planning to install posts for your deck, it’s essential to ensure that these are correctly aligned and level. One of the best ways to do this is by using a laser level, which can give you precise measurements and ensure that your posts are securely in place. To start, you’ll need to clear the area around each post and measure the height required.

Set up your laser level at one end of the deck and adjust the height until it shines across the entire length of your chosen post. Mark the post at this level and repeat the process for each post. Laser levels are a great tool to use when installing deck posts, especially if you want to ensure that the deck is completely level and safely built.

Gather Materials and Tools

Before starting to install your fence posts, you need to prepare your deck properly. This involves gathering the required materials and tools before you begin. You will need fence posts of the right material and length, such as wood or metal, which run the full height of your fence.

You will also need tools for drilling, such as a drill, saw, screws, hammer, and nails. Make sure you have measuring tools like a measuring tape, level, and straight edge to ensure accurate measurements. Additionally, you need to check your deck’s structural integrity, and if it needs any repair or reinforcement to support the fence posts’ weight.

Remember to wear proper protective gear such as gloves, safety goggles, and earplugs while doing so. By preparing your deck thoughtfully, you can avoid any careless accidents.

Marking the Post Heights

Before installing the posts for your deck, it’s important to first mark their height. This ensures that each post is cut to the correct length and your deck will have a level surface. A simple tool that can be used to mark the posts is a laser level.

Start by attaching the level to one of the existing posts and have it project a straight beam onto each of the locations where a new post will be installed. With the help of a partner, mark the height of the beam onto each post using a pencil or marker. This will give you a clear guide to follow when it’s time to cut the posts to size.

Taking the time to prepare your deck for post installation will save you a lot of headache down the line and make the construction process go much smoother.

Using the Laser Level for Post Alignment

If you’re planning on building a deck, one of the most important steps in the process is to properly install the posts that support the structure. Using a laser level can make the process much easier and more accurate. Start by setting up the laser level on a tripod at one end of the site where the deck will be built.

Turn on the laser and adjust the height until it is level with the desired height of the deck. Then, move the laser to the other end of the site and repeat the process. This will give you two reference points that are level with each other.

Next, place the posts in the desired locations and use a bubble level to ensure they are level vertically. Once that’s done, use the laser to ensure that the tops of all the posts are level with each other. This will ensure that your deck is properly supported and will be safe to use.

By following these steps and using a laser level, you’ll be able to install your deck posts with ease and accuracy.

Setting up the Laser level

Setting up the Laser level can be an easy task if done correctly. Firstly, find a level surface to place the laser level on. It’s essential to ensure that the device is placed on a sturdy and flat surface.

Secondly, turn on the laser level and adjust the height and angle of the device to the required level. For post alignment, use a vertical line laser level to ensure that the posts are perfectly aligned. By using the laser level, you can save time and effort by getting precise measurements without manual adjustments.

In addition, this ensures accuracy, making it easy to adjust and fix any errors early on. Overall, setting up the laser level is a simple but vital step in getting accurate and precise measurements.

Aligning the Posts with the Laser Level

When it comes to building fences or decks, post alignment is a crucial step to ensure proper installation. Thankfully, technology has made this process much easier and accurate with the use of a laser level. By simply setting up the level and aligning it with the first post, you can ensure that the rest of the posts will also be in line with the first one.

This not only saves time but also eliminates the need for measuring and eyeballing post placement, which can sometimes lead to incorrect measurements and crooked installations. With the precision and ease of a laser level, aligning posts has become a simple and straightforward task.

Checking for Levelness

If you’re constructing a fence or any other outdoor structure using wooden posts, making sure they are level is crucial for a sturdy and durable final result. This is where a laser level comes in handy. A laser level can emit a straight and accurate beam of light, which you can use to check if your wooden posts are level.

Simply attach the laser level to a tripod and position it at one end of the area where you will install the posts. Turn on the laser level and adjust the height until it emits a level beam of light. Then, move to the other end of the area and make sure the beam of light is at the same height.

By doing this, you’ll be able to locate any unevenness in the surface and adjust the posts accordingly. Overall, using a laser level for post alignment is an easy and efficient way to ensure that your fence or other outdoor structure is safe, sturdy, and attractive.


In conclusion, using a laser level for deck posts is like having your own personal superhero to ensure your deck is level and sturdy. With its precise beam of light, the laser level takes the guesswork out of the equation, making it easy to get the perfect deck post height every time. So, instead of relying on your shaky hand and a flimsy measuring tape, let the laser level be your trusty sidekick and create the deck of your dreams with ease.


What is a laser level and how does it work in deck post installation?
A laser level is a tool that projects a visible laser line or dot to indicate a level mark on a surface. To use a laser level for deck posts, you can place it on a tripod or attach it to the post and adjust the height until the laser beam is at the desired level.

What are the benefits of using a laser level for deck posts?
Using a laser level for deck posts can help ensure that all posts are installed at the same level and height, which can prevent uneven or unstable decking. It can also save time and effort compared to using traditional leveling methods.

Can a laser level be used for sloped decks?
Yes, a laser level can be used for sloped decks. You can adjust the height of the laser beam to match the desired slope and mark the posts accordingly.

Do I need special training to use a laser level for deck posts?
No, you do not need special training to use a laser level for deck posts. However, it’s important to read and follow the user manual and safety instructions to avoid any accidents or damage.

What type of laser level is best for deck post installation?
A rotary laser level is ideal for deck post installation as it can project a 360-degree laser line and is highly accurate.

Can a laser level be used in windy or rainy conditions?
No, it’s not recommended to use a laser level in windy or rainy conditions as it can affect the accuracy of the laser beam and pose a safety hazard.

How can I ensure the laser level is calibrated correctly?
You can test the accuracy and calibration of the laser level by placing it on a flat surface and checking if the laser beam is level. You can also refer to the user manual for specific calibration instructions.

Show More

Related Articles