Mold is a health hazard that needs to be remedied quickly. Attic mold forms when warm, moist air from your living spaces meets the cold underside of your roof, creating condensation. This moisture, combined with organic materials such as wood, creates the perfect breeding ground for mold. In the video above, This Old House general contractor Tom Silva demonstrates a professional approach to eliminating dangerous attic mold outbreaks.
Signs of Attic Mold
If left unchecked, mold can lead to respiratory problems, allergic reactions, and even structural damage to your home. Before it can be removed, you have to figure out how widespread the problem is, why it’s happening, and how to avoid it going forward.
Identifying mold in your attic is the first step in figuring out the right treatment. Here are some common indicators:
- Musty odors
- Discoloration on wood surfaces
- Visible mold growth on insulation
- Damp or wet spots on the attic floor or walls
Causes of Attic Mold
Several factors contribute to mold growth in attics, such as the following:
- Poor ventilation
- Roof leaks
- Inadequate insulation
- High indoor humidity levels
- Improperly vented bathroom or kitchen exhaust fans
- Critter infestations that leave behind urine
Understanding these causes can help you prevent future mold growth after cleaning up the existing problem.
Professional Mold Removal Techniques
While minor mold issues can sometimes be addressed by homeowners, extensive mold growth requires professional intervention. The method Silva demonstrates in the video involves using specialized equipment and techniques to guarantee thorough mold removal.
Dry-Ice Blasting
One effective method for removing attic mold is dry-ice blasting. This technique uses compressed air to propel dry-ice pellets at high speeds, effectively removing mold without damaging the underlying wood. It leaves no residual moisture that could promote further mold growth.
Containment and Air Filtration
To prevent mold spores from spreading through your home during the cleaning process, professionals use containment and air filtration techniques. This includes covering the attic floor with polyethylene sheets, setting up negative air machines for filtering, and using HEPA vacuums to collect mold dust and debris.
DIY Mold Prevention and Maintenance
While professional cleaning is often necessary for extensive mold problems, there are steps homeowners can take to prevent mold growth and promote a healthy attic environment.
Improving Attic Ventilation
Proper ventilation plays a big part in mold prevention. Here are some ways to improve your attic’s ventilation:
- Install ridge vents and soffit vents.
- Ensure existing vents are not blocked by insulation.
- Add attic fans for increased air circulation.
Addressing Moisture Sources
Eliminating sources of moisture is key to preventing mold. Take these steps to reduce moisture in your attic:
- Repair any roof leaks promptly.
- Ensure bathroom and kitchen exhaust fans vent directly outside.
- Use a dehumidifier in damp climates.
- Check and maintain gutters and downspouts to prevent water from seeping into the attic.
Regular Inspections
Regularly inspecting your attic can help you catch mold problems early. During these inspections, we recommend you do the following:
- Look for signs of water damage or discoloration.
- Check insulation for dampness.
- Inspect the underside of the roof sheathing for condensation or frost during winter months.
- Monitor humidity levels with a hygrometer.
Detailed Steps To Clean Attic Mold
Knowing how mold develops and recognizing the signs are important, but tackling the mold head-on requires a structured approach. Here’s how to handle it.
Preparation
Before starting the mold removal process, gather the necessary tools and cleaning agents where you’ll do the cleaning. You don’t want to track anything back and forth throughout your home. Wear protective gear, including a mask and gloves, and keep the attic well-ventilated throughout the process. Keep away children, pets, and anyone with respiratory issues.
Cleaning Process
Remove all stored items from the attic, placing anything you think may be contaminated outside. For sentimental or expensive items, use a mold-specific cleaner and leave them outside to dry completely before bringing them back in. Clean them twice to be cautious. Vacuum the attic to remove loose mold spores and debris. Clean affected surfaces with a mold-removing cleaner or a mixture of white vinegar and water.
Drying and Prevention
After cleaning, thoroughly dry the area. Use fans and dehumidifiers to reduce moisture levels. Apply a mold-inhibiting spray to prevent future growth, and seal any cracks or gaps to prevent moisture entry.
Advanced Attic Mold Remediation Techniques
Advanced remediation is sometimes necessary for more severe mold infestations. Here are some intensive techniques used by professionals for comprehensive mold removal and long-term prevention.
Fogging
Fogging is an advanced technique where a mold-inhibiting solution is turned into a fine mist and sprayed throughout the attic, reaching every nook and cranny. This method helps eradicate mold spores from hidden areas and prevents recurrence.
Soda Blasting
An alternative to dry-ice blasting, soda blasting uses sodium bicarbonate particles propelled at high speeds. This method removes mold effectively and is less abrasive on surfaces. It’s ideal for delicate areas where dry-ice blasting might be too harsh.
UV Light Treatment
UV light can break down the DNA of mold spores, rendering them inactive. It’s a chemical-free option that can be used in conjunction with other methods for a comprehensive cleanup.
Attic Environmental Controls
Keeping mold at bay requires a balanced environment within the attic. Implementing environmental controls can significantly reduce mold formation risks, ensuring long-term peace of mind.
Improving Insulation
Better insulation helps regulate your home’s temperature, reducing condensation that can lead to mold growth. Using high-quality, mold-resistant insulation materials can add an extra layer of protection.
Using Moisture Barriers
Installing moisture barriers can help keep water vapor from permeating into the attic space. These barriers are especially useful in climates with high humidity or for homes in areas prone to heavy rainfall.
Smart Home Integration
Integrating smart home systems can also aid in mold prevention. Smart humidistats, sensors, and automated ventilation systems can monitor and control attic conditions in real time, issuing alerts if moisture levels become problematic.
