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Everything You Need to Know About Floor Joists & Band Boards

In our previous article, we discussed “Common Wet Insulation Issues.” Now, let’s continue focusing on your home’s structure and dive into everything you need to know about floor joists and band boards.

No need to wait—let’s get started!

What Are Floor Joists & Band Boards?

Floor joists and band boards (also known as rim joists) are crucial components of your home’s structural framework.

Floor joists are horizontal beams that run across the length of your home’s foundation or support walls, providing the main support for your flooring system. They distribute weight evenly and ensure the floors remain stable.

The band board or rim joist sits perpendicular to the ends of the floor joists, forming the outer edge of the floor framing. It helps secure the floor joists together and provides additional stability to the structure. The term “rim joist” is often used interchangeably with “band board,” but both refer to this vital piece that anchors the floor joists and supports the overall structure of your home.

Signs of Damage to Your Floor Joists and Band Boards

Signs of issues with your floor joists and band boards include:

If you notice any of these signs, it could mean your floor joists or band boards are compromised and need professional attention to prevent further structural damage.

What You Need to Know Next

In this post, we covered everything you need to know about floor joists and band boards, including their purpose, common issues, and signs of damage to watch for. Understanding these crucial components can help you maintain the structural integrity of your home.

There’s much more to learn about protecting your property, so in our next article, we’ll dive into “Your Guide to House Lifting.”

If you need foundation repair services, Foundation Recovery Systems offers a quick, easy, and completely FREE inspection—just click the button below to get started!

FAQs

The cost varies depending on the size of your crawl space and the extent of repairs needed. Contact us for a free inspection by our experts, who can provide an accurate cost estimate. We also offer financing options and obligation-free repair estimates. 

Often mistaken for mold, wood rot mainly affects crawl space joists and beams, leading to floor sagging. Unlike certain molds, wood rot is not usually toxic, but both can aggravate health conditions like asthma and allergies. Foundation Recovery Systems will identify the specific issue in your crawl space and provide the right solution during our free inspection

Neglecting wood rot only leads to its progression and expansion, attracting pests that bore into wood and causing structural issues such as sagging floors and overall structural weakening. This poses a risk to both the health of your home and its structural soundness. It’s critical to seek professional help from crawl space experts like Foundation Recovery Systems at the earliest indication of wood rot. We offer prompt and thorough evaluations during our free inspections and provide tailored repair strategies. 

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I had Troy conduct a mold inspection on my basement. Communication up to the appointment was excellent, and his professionalism was outstanding. Found no concerns with my basement and did recommend equipment that could aid with future problems. Would highly recommend this company!

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Great experience. Very personable and professional. He was very knowledgeable and didn't try to oversale. Got estimates from two other…

Great experience. Very personable and professional. He was very knowledgeable and didn't try to oversale. Got estimates from two other companies and was more impressed with Matt and what he was able to do for us!

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Best in the industry!

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Elliot arrived on time and was easy to talk to and understand. He went right to work checking out my crawl space on a freezing cold day….

Elliot arrived on time and was easy to talk to and understand. He went right to work checking out my crawl space on a freezing cold day. When he was done he shared his findings with me and drew up a foot print of the house and the work he recommended. It was all well explained and understandable me. He also gave me a quote for the work. It took about 2-3 hours and I'm confident he did a quality job.

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Chad was prompt, very personable but yet easy to talk to. He explained what was recommended, options and costs!

Chad was prompt, very personable but yet easy to talk to. He explained what was recommended, options and costs!

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We hired Foundation Recovery to brace one wall and anchor another in our basement. The team (Cliff, Riley, and Nolan) was professional,…

We hired Foundation Recovery to brace one wall and anchor another in our basement. The team (Cliff, Riley, and Nolan) was professional, timely, and cleaned up well. They explained the procedure well, and even gave us some tips on how to better water proof and pest proof the walls. We were very happy with the services provided by them!

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Looks great! Blake & Gandy did a great job!

Looks great! Blake & Gandy did a great job!

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William Diemer was very good to work with. He was on time and very informative about their products. The video displaying the volume of…

William Diemer was very good to work with. He was on time and very informative about their products. The video displaying the volume of water that can be behind your foundation was interesting and a true eye opener. Will be happy to have him over to another property that also has issues.

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Nick and Isaiah came out to level our drive and it was a great experience. They were though with going over problem areas and explained…

Nick and Isaiah came out to level our drive and it was a great experience. They were though with going over problem areas and explained things that might have caused our issues and gave suggestions on how to make improvements. The customer service was outstanding and the work was exceptional. I highly recommend Foundation Recovery Systems for all of your concrete leveling needs!

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Cody was phenomenal in helping us diagnose our home. He answered all questions thoroughly and set us at ease with potential foundation…

Cody was phenomenal in helping us diagnose our home. He answered all questions thoroughly and set us at ease with potential foundation issues. Highly recommended!

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Kurk was prompt and, like every single person we’ve dealt with at FRS, very professional. He is a thorough job and was very…

Kurk was prompt and, like every single person we’ve dealt with at FRS, very professional. He is a thorough job and was very helpful. However, not happy to learn, 1-1/2 year after repairing my driveway, with the understanding that this was guaranteed for 5 years , that now an annual service plan is recommended so an additional and unexpected cost.

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Excellent. The men from the Moberly office did a great job. Very professional. They installed both helical and push piers. An investment…

Excellent. The men from the Moberly office did a great job. Very professional. They installed both helical and push piers. An investment for when I go to sell my house. I sleep well at night, now. Good job Gered!

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We are very pleased with the service we received! These young men were very punctual, thorough, knowledgeable and professional. They were…

We are very pleased with the service we received! These young men were very punctual, thorough, knowledgeable and professional. They were even polite when I asked the same questions repeatedly. lol Big shout out to CJ Schlater, Aundra Butner and Duncan Zimmer! Our house is no longer sinking away.

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I would like to start off by giving a big thank you to Joe, Devon, and Lane. They did exceptional work on our house and were very…

I would like to start off by giving a big thank you to Joe, Devon, and Lane. They did exceptional work on our house and were very professional! They made the project quick and easy!! I’m very happy with the work they did!! I would definitely call back and use there services again in the future!

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They acted professionally, neatly done job in a timely fashion.They kept us informed on every aspect of the job.I highly recommend this…

They acted professionally, neatly done job in a timely fashion.They kept us informed on every aspect of the job.I highly recommend this company and Dawson, Dusty and Jaden were all very courteous, friendly and professional.

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Mark and his crew did an excellent job in our crawlspace. Very knowledgeable and informative. They worked long hours in cold weather….

Mark and his crew did an excellent job in our crawlspace. Very knowledgeable and informative. They worked long hours in cold weather. Highly recommend them!!

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January 12, 2026 – I contracted with FRS to lift a settled concrete walkway and a settled concrete patio. The job was performed by KD and…

January 12, 2026 – I contracted with FRS to lift a settled concrete walkway and a settled concrete patio. The job was performed by KD and Denzell. The work was performed as sold and expected. The workers were both professional and personable. I appreciate their work.

Leah Leitow

Leah Leitow

Content Writer

Leah is a Content Writer for Groundworks with more than ten years of experience working in the foundation repair industry. Her experience ranges from working with homeowners to find the right solution to training inspectors and staff. In her background as a Michigan journalist, she gained invaluable insight into people's lives throughout our state. Leah lives in metro Detroit with her husband and two sons.

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