How To Build A Containment Zone

Craig Schreiner • September 17, 2020

Containments are a vital part of the remediation work our healthcare division does in many buildings, including hospitals and assisted living facilities. On this week’s blog, I am going to explain how to build a containment. Now, you may be wondering, what is a containment and what are they used for? Containments are built to control the migration of airborne mold spores or other biohazard materials, while the remediation expert works to return the affected area to normal conditions.



LIMITED AND FULL CONTAINMENTS

There are two types of containment, limited and full. In general, the size and type of containment needed is determined by the size of the contaminated area. If proper containments are not built, it can affect adjacent spaces to the work area and cause cross contamination, among other issues.


MANAGING AIRFLOW IN A CONTAINMENT

Now, I will break it down step-by-step. The first step is to install a HEPA-filtered Negative Air machine. This pulls air from the affected area and exhausts the contaminated air outside of the structure. Eventually, this creates a negative air environment.


Sometimes, the space may require creating positive airflow. Setting up positive air pressure is just as important in protecting unaffected areas, while affected areas are being remediated. Since sometimes negative pressure is difficult to achieve, positive air pressure is then created.


Lastly, Neutral Air Pressure is when airflow is contained to a certain space. Usually, neutral air flow is used when outdoor air is not favorable, outdoor access is not available, or negative and positive pressures are not practical.


INSTALLING PHYSICAL STRUCTURES

After the air machines are placed, the next step is to install physical barriers into the work area. Usually, this is done with a heavy plastic or polyethylene sheeting and tape. Bigger areas may need steel frames or wooden studs to secure the plastic material. The main goal here is to completely isolate the work area from any nearby, non-affected areas. All doorways, electrical outlets, light fixtures and any other areas that could allow airflow between the work area and non-affected areas, should be sealed.


Once the machines and physical barriers are installed, a negative pressure environment should be in effect. This means the air pressure within the workspace is less than the air pressure in the areas surrounding that space. Therefore, any mold spores that become airborne through the remediation process are in turn, controlled.

OTHER IMPORTANT MATERIALS

In addition to the establishing proper air pressure and building physical structures, it is important to utilize personal protective equipment, or PPE, during this process. Depending on the affected area, the remediation team member may need gloves, googles, a respirator a disposable suits, among other materials.


CONTACT GRS

Although it may seem like simple process, it is extremely important to build these containment spaces prior to mold or biohazard remediation. Our team of dedicated professionals is available 24/7, for any mold, water, fire or wind property damage that needs immediate attention. If your business or home has experienced mold growth or has been affected by biohazardous material, contact us at 1-800-349-HELP (4357) or email info@guaranteerestoration.net.

Commercial Properties after Flood
By Taylor Millet July 23, 2025
Commercial property damage in New Orleans demands more than basic repairs. Protect your business with expert reconstruction services that respect historic architecture and help you reopen quickly after disaster.
Property After Natural Disaster
By Zack Klein July 16, 2025
Taking the right steps after a storm protects your property and speeds recovery. Assess damage, begin cleanup, and rely on expert restoration services to manage repairs after hurricanes or severe weather on the Gulf Coast.
By Christina Mullins July 9, 2025
Saying Hi to July! The summer is here—and so is the 2025 Atlantic Hurricane Season. No matter what it brings, you can be assured that our team at Guarantee Restoration Services will be there when you need us most. Meet the Team: Marcela Argueta Every month, I have the opportunity to showcase our many awesome team members. For July, we are shining the spotlight on Marcela Argueta , who serves as a Lead Technician at our New Orleans location. She was promoted to that position in January 2025 . From Honduras to GRS Marcela was born and raised in La Ceiba, Honduras , also known as “la novia de Honduras” —which translates to “the bride of Honduras.” She moved to the U.S. in December 2016 after earning her bachelor’s degree in nursing from the Universidad Nacional Autónoma de Honduras . Marcela is currently approved and ready to take her exam to become a registered nurse in the U.S. Before joining our team in August 2022 , she worked as both a nurse and a homemaker . Life Outside of Work Marcela is a proud mother of two—her son, Sebastian (15) and daughter, Eleanor (5) . When she’s not working, she loves spending quality time with her children and extended family. Fun fact: her half-sister, Brenda , also works at GRS in our Baton Rouge office! One of Marcela’s favorite pastimes is going for walks in the park. She says she often uses this time to meditate and reflect—thinking about what she’s done well and what she could improve.
VIEW ALL BLOGS