Floor Joist Damaged by Plumber

Date Published: June 7, 2016

We love good plumbers! Running pipes through a home is not an easy job, and if done correctly, it usually goes unnoticed. In some cases, however, plumbing is done incorrectly, and it can have serious repercussions on a home. Recently we found floor joist damaged by a plumber.

Above are a few pictures of plumbing that was added that affected the structural integrity of the floor. Pipes are commonly run through floor joists, but floor joists have a job of their own -holding up the floor!  If you put too many holes in a floor joist or just take a piece out of it altogether, you risk compromising or damaging the floor above it, resulting in sagging and cracking, especially if any weight is applied to the damaged joist.

The first picture shows where the plumber removed an entire piece if a joist to add a drain to what looks like a toilet. Now, the floor strength is questionable, and to make matters worse they set a 40-50 pound toilet on top of it, in addition to the weight of the occasional person using the restroom. I think we may have a problem, Houston.

To fix a floor joist damaged by a contractor or plumber, you will often need to have a structural engineer or framing contractor evaluate how to repair the structural problem in the area. This can be a costly undertaking.

For more information articles like this, check out our Ask Your Inspector page. We have dozens of informational articles that will help you take the best possible care of one of your largest investments – Your Home.  Read more about our Inspection Services.

Colorado’s Top Rated Inspection Company:

Scott Home Inspection is Colorado’s highest rated inspection company offering home inspections, energy services, and Boulder Rental License Inspections. Click your service to learn more.

About the Author: Chris Scott

Chris Scott is an ASHI certified home inspector with multiple years of experience in home inspections, blower door testing, duct leakage testing, and Boulder Rental License Inspections. Chris is also the Website Coordinator for Scott Home Inspection.

Recent Posts

303, 2026

3 Signs Your Insulation Might Need an Upgrade

Insulation plays a quiet but critical role in Colorado homes. If rooms feel cold at night, energy bills seem high, or temperatures vary between floors, your insulation may need attention. Here are three common signs and what they mean for comfort and long-term ownership costs.

2002, 2026

A Guide to Radon and Radon Testing in Colorado

Radon is invisible, odorless, and common in Colorado homes — especially along the Front Range. Learn what radon is, how it enters a home, and how radon testing works during a real estate transaction so you can move forward with clarity and confidence.

1002, 2026

How Does Radon Mitigation Work in Colorado?

Radon mitigation is a common and highly effective solution for Colorado homes, especially along the Front Range. Learn how radon mitigation systems work, what they look like, how much they cost, and why they’re considered a standard part of responsible homeownership in Denver and surrounding areas.

2001, 2026

What Is Radon Testing and When Should I Get My Home Tested?

Radon is an invisible, odorless gas that can be present in homes across Colorado—especially along the Front Range. While it’s easy to overlook, radon testing is a simple, non-invasive step that can provide valuable peace of mind during the homebuying process. This article explains what radon testing is, how it works, and when buyers should consider having their home tested to make confident, informed decisions before closing.

Ready For A Great Inspection Experience?

Experience quality with the top rated Colorado based company for home inspections, energy services, and rental inspections.

Discussion

Visit Our Ask Your Inspector page to see all our posts, find great Colorado contractors, and ask us questions about your home.