Is your hardieboard damaged? Here’s How To Fix It

  • Reading time:6 mins read
  • Post comments:0 Comments

If you have noticed that your hardieboard is damaged, it’s important that you repair it before the problem gets worse. In this article, we’re going to talk about how to fix hardieboard siding, so you can get your house looking great again.

Hardieboard siding is a very popular material for home siding. It’s a type of cement board that is known for its durability and versatility. However, there are times when this tough material can become damaged. If you find that one or more of your hardieboard panels has been damaged, you’ll want to repair it as soon as possible to avoid further problems from occurring.

There are a few different ways that you can fix your hardieboard siding. One way is to simply replace the panel with a new one. Another option is to use a special epoxy filler that is designed specifically for repairing hardieboard siding. You’ll want to make sure you choose an epoxy filler that is compatible with the particular brand of cement board you have installed on your home.

Most homeowners don’t know that James Hardie is a brand name of fiber cement siding that can be repaired or refinished if it’s damaged. We were recently called out to the home of a homeowner who had hardieboard siding that was chipping. Knowing what we did and how to fix it, we sent the following helpful information to the customer in our response:

We are often called out by homeowners who want to replace their existing Hardie Board siding because they believe that there is no way to fix it when it gets damaged. The truth is, however, that Hardie Board siding can be repaired or refinished just like any other kind of exterior siding.

There are two types of problems you may encounter with your Hardie Board siding. One type is when the board itself gets damaged due to hail or some other impact from the outside. In this case, the damage is usually localized and not very extensive. However, if there are large areas of damage then it may be necessary for you to replace sections rather than trying to repair them individually.

The second type of problem occurs when water gets behind your siding and causes mold or mildew growth on its surface. This can cause staining and discoloration which will require sand

Hardie board siding, also called cement board siding, is a popular and attractive choice for residential exterior surfaces. It’s easy to clean and care for, and it can withstand high winds and other harsh conditions. However, hardie board has its drawbacks. Hardie board siding is susceptible to cracking. The cracks may be small or large in size. Cracks may be black in color, especially if the house is located under trees that drop sap or leaves onto the surface of the hardie board.

If you notice cracks on your hardie board, don’t panic; they can be repaired with ease. But before you begin any repairs, make sure you’ve identified the cause of the problem. This will help prevent further damage to your home’s exterior.

If you’ve recently painted your home’s hardie board siding, you may have noticed some cracking in the paint film. This is usually caused by uneven drying or curing of the paint film over time or by temperature fluctuations that occur during different seasons of the year. It’s not something to worry about; simply apply another coat of paint or sealant on top of what’s already there until you have a smooth surface again.

If you discover your hardie board siding has cracked because it was

Hardieboard siding, like most forms of siding, is designed to protect your home from the elements. Hardieboard is a cement product that can take quite a bit of abuse, but it does have some limitations. The question becomes when to repair and when to replace Hardieboard siding. If you need to repair or replace Hardieboard siding, here’s what you need to know:

Repairing Damaged Hardieboard Siding

The area near the ground will be damaged more quickly due to dirt and debris being blown against it and by pets rubbing up against it. It is not unusual for this area to become worn and even cracked after a few years. To repair damaged Hardieboard siding, you’ll need:

1/2″ plywood 12″x12″ square (or any spare piece of plywood large enough)


Paint that matches your current paint scheme


Nails or screws

Putty knife

Step 1 – Remove Damaged Piece of Siding

Using a hammer, remove the damaged piece of siding from its mounting area by pulling off any nails left in the wood. You’ll want to wear safety goggles while doing this as wood splinters can fly into

Recently, a reader asked how to repair some damaged Hardieboard lap siding. This type of siding is also known as Hardiplank and Fiber Cement Siding. The problem with HardieBoard siding is that it cannot be repaired like wood siding. It must be replaced.

Replacing a section of Hardieboard siding on a home is not difficult but you will need to have some basic carpentry skills and the right tools.

You can either purchase the replacement Hardieboard piece or make one yourself at home. I prefer to make my own because I have the tools and know how to use them correctly. Plus, when I cut my own pieces I can make sure they are exactly the right size and shape for a perfect fit without any gaps between the new piece and existing boards.

Hardie board siding is a great product when installed correctly. But when there is no house wrap or other moisture barriers and the wrong type of nails are used, you can run into all sorts of problems.


Hardie board needs to be nailed properly in order to flex with the weather changes. If it can not flex, it will crack and buckle. The nails that are used need to have an expansion gap between the nail head and the board.

What hardie board is:

Hardie board is made in two different ways. One way is to press the cement or hardie board into sheets. The ones you see below are called HardiePlank lap siding and they are made by pressing them into sheets. They also make other styles of HardiBoard such as HardiPanel vertical siding, HardiShingle individual shingle panels, HardiTrim boards for window surrounds, etc..

I am trying to repair some Hardie Board siding. The end of the board was damaged by a falling tree branch. There is a small hole and some cracking in the corner. The rest of the board is fine. I have ordered a new piece from the distributor, but I don’t want to remove the entire board for a small repair. Can I cut off the damaged end and apply it? If so, what is the best way to do this?

Leave a Reply