Generally, it is critical to properly place Hardie sidings, especially around windows and doors. Thus, cutting the right-sized siding piece and attaching it to the outer wall is the simplest way to install it.

Maybe you’re asking questions like what type of sidings should you buy? How do you install it on your own? Well, this article got that covered. Keep on reading to know more about the steps to follow. 

    8 Steps To Install Hardie Siding Around Windows

    There are a few easy steps to install a Hardie siding around your windows like a professional. But, before enumerating the steps, first things first: the list of the tools you need. 

    What You’ll Need

    Of course, before the work starts, preparing all the tools and materials will make the installation fast and efficient. The list below consists of the things you need: 

    • Fiber Siding block
    • Mounting block 
    • Kick-out flashing 
    • Drill machine set 
    • Air compressor and hose
    • Sawhorse or circular saw
    • Drip cap
    • Stapler
    • Galvanized finish nails or 15 gauge stainless steel
    • Caulk gun
    • Trim Nailer
    • Chalk line
    • Speed square
    • Paint 
    • Level 

    Aside from these mentioned above, you also need safety gear. It would help if you also prepared eye-protective goggles, gloves, boots, jackets, and nose muffs.  

    Steps To Follow

    Step 1: Prepare Your Project Tools And Materials

    Days before your small window project starts, make sure to have all the tools and supplies. After collating the needed materials, organizing them should be your next step. 

    Detailed planning should also be part of your preparation. You have to list the number of trim you need, the window sizes, budget, and finishing paintings. Remember that good planning results in a successful outcome.

    Step 2: Check Existing Trim Conditions

    You must first remove the old trim using a knife to start your project. Make sure that you carefully cut between the trim and wall joint. Missing the supposed cut can damage your wall paint and caulk. Once removed, pull out any remaining nails or debris.

    Step 3: Accurately Measure Trim Dimensions

    Before you cut your panel or trim, take accurate measurements of the window. You can use a pencil to draw signs on your board. Pro tip: always double-check the size and specific measurements. There’s no room for error, especially when you start chopping off the boards.  

    Step 4: Cut Your Trim

    After the measurement has been carefully checked, it’s time for some cutting. Use a saw specifically designed for the materials you have to avoid ripping and too much dust. A conventional saw is advised.

    Don’t forget to put on your safety gear as you start cutting.

    Step 5: Properly Install Your Trim

    Inspect your Hardie trim for possible damages before preparing it for installation.

    Start attaching the trim with two-inch 16-gauge finish nails every 16 inches to make the trim lay flat. To prevent liquid build-up on your siding, you also must leave a ¼-inch gap between the window and the plank. 

    For your next step, place the top post across the two vertical blocks and ensure that it is extended at the bottom. Lastly, apply the shims to make an even wall and flange. 

    Step 6: Secure The Flashing

    After the installation, you must check your flashing thoroughly and make sure it aligns with your local building code. This step will protect your house from rainwater or liquid rolling down inside. To have the best result, vertically and horizontally flash the openings. 

    Step 7: Caulk and Seal

    Second to the final step is to caulk all the trim sides where it meets the siding. Use a caulk gun to finish this step and apply it at a 45-degree angle. Remember not to wipe the excess since high-quality caulk is set naturally. 

    Step 8: Finish Up 

    The last thing you can do is to paint your siding. Though the Hardie has a 15-years warranty, fading is still possible. Thus, ensuring that it is well set can spare you the constant repainting. You can do the painting before or after the siding installation. 

    Common Types Of Hardie Siding Trim Around Windows 

    Another thing you need to know before buying a Hardie siding is its different types. Thus, this article has already compiled them for you. 

    HardieTrim Boards

    In some areas, HardieTrim boards are the most used product. It is made of the same fiber cement material durable as the HardiePlank siding. The only con for this type of siding is the lack of color choices. 

    Engineered Wood Or Smart Trim

    This type of siding has a combined rich cedar-grain wood texture and is astounded for its beautiful finish. It also gives a long-lasting extended curb appeal. However, unlike the HardieTrim, Smart Trim does not have factory-painted colors. Thus, you need to paint it yourself or have your local paint shop do the job. 

    Frame Lap Siding

    Also known as Direct To Window, this type of siding is the most commonly installed in the US. The term itself refers to the majority of horizontal siding installations. It does not require much cutting, but if your windows need repair in the future, it cannot be very easy. 

    J-Trim Siding

    This metal J-shaped trim is one of the good options to reduce the “ visual impact of the openings.” Even though the visual impact is reduced, it can still provide an aesthetically pleasing finish. Using this also does not need much caulking and painting. 

    Get Expert Help If Necessary

    Window trims and flashing might look like an easy DIY task based on the given steps. However, it still requires great muscle skills to proportionate your exteriors. There’s quite a little to no margin for errors while siding your window. 

    Damages might also occur later when it is not done properly, leading to massive hassle. Thus, if you think that siding might be a little too much for you, ask for professional help. It will ease you with the work while producing a more premium finish.

    Editorial Contributors
    avatar for Matt Greenfield

    Matt Greenfield

    Matt Greenfield is an experienced writer specializing in home improvement topics. He has a passion for educating and empowering homeowners to make informed decisions about their properties. Matt's writing focuses on a range of topics, including windows, flooring, HVAC, and construction materials. With a background in construction and home renovation, Matt is well-versed in the latest trends and techniques in the industry. His articles offer practical advice and expert insights that help readers tackle their home improvement projects with confidence. Whether you're a DIY enthusiast or a seasoned professional, Matt's writing is sure to provide valuable guidance and inspiration.

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