Navigating the Challenges of Canec Ceilings in Hawaii Home Remodels
Did you know that "Canec" ceilings in Hawaii homes may pose unique challenges when going through a remodel? Disturbing Canec ceilings during demo may create dust that is dangerous to your family.
Understanding Canec: A Brief Insight
Canec is a type of fiberboard that was commonly used in ceilings and walls in Hawaii from the 1930s to the 1960s. It is a distinctive type of fiberboard crafted from bagasse, a byproduct of sugarcane processing. Characterized by its brownish-orange hue and smooth, painted surface, Canec holds a unique place in the architectural history of Hawaii. Notably softer than conventional drywall, Canec can be easily dented with a firm press of a fingernail.
However, beneath its nostalgic charm lies a hidden concern—Canec was treated with inorganic arsenic compounds as an anti-termite agent. This treatment introduces a potential health risk associated with exposure to Canec dust or debris, making it crucial to approach remodeling projects involving Canec with caution.
Health Considerations and Recommendations
The Hawaii State Department of Health underscores the importance of minimizing exposure to deteriorating Canec. This becomes especially critical for parents with young children, as children are more susceptible to exposure from common hand-to-mouth activities.
Parents are advised to pay special attention to their child's actions in structures with deteriorated Canec or during renovation projects involving Canec. The increased vulnerability of children to potential health risks necessitates a proactive stance when it comes to home renovations.
FREQUENTLY ASKED QUESTIONS ABOUT CANEC CEILINGS
Question: I think my house might have canec ceilings. How can I tell for sure?
Canec ceilings often have V-shaped groove joints in linear patterns. The material itself is brownish-orange and can be dented easily. If unsure, a sample can be sent to a lab for arsenic testing.
Question: What are the biggest risks with canec ceilings?
The key concern with Canec is the presence of arsenic, a heavy metal. When Canec is intact and not disturbed, the arsenic is trapped within the material and unlikely to cause health problems. However, if the Canec becomes damaged, crumbles, or releases dust particles, there's a risk of inhaling arsenic dust, which can be harmful.
Here's an analogy: Imagine a bag of flour. The flour itself isn't harmful, but if the bag breaks and releases flour dust into the air, you could inhale it and have trouble breathing. Similarly, Canec when intact is like the sealed bag, but when disturbed, it can release harmful dust like the broken bag.
Question: Do canec ceilings contain asbestos?
Canec in itself contains arsenic and only sometimes also contains asbestos. Therefore sometimes we do additional testing for asbestos.
Question: How much aresenic is in canec ceilings?
Canec samples have contained arsenic in the range of 1,000 to 4,000 mg/kg (parts per million). By comparison, the volcanic soils in Hawai‘i typically have a natural background concentration of arsenic less than 20 mg/kg. This means the canec contains up to 200 times more arsenic than what's normally found in Hawaiian soil. Note that the amounts found in soil are not known to cause any health issues.
Question: Can I paint over canec ceilings or do I have to remove them?
Most homeowners choose to paint over canec ceilings if the ceilings are in good condition (free from cracks, warping or water damage). If there is any deterioration such as holes or damages, you may consider alternative options such as a complete removal. This is because painting can trap moisture and worsen the deterioration. Repairing or replacing the damaged sections is a better option.
When choosing a paint, you may choose an oil based paint, however, these are high in VOC (volatile organic compounds).
In regards to cost, painting over your ceilings will likely cost less than a complete removal.
Question: Can canec be disposed of with regular trash?
No, canec waste needs to be disposed of in a separate bag at a permitted landfill. It's exempt from hazardous waste testing requirements as long as kept separate from other construction debris.
HILWEH BUILDERS IS YOUR FAMILY SAFE GENERAL CONTRACTOR
At Hilweh Builders, we understand the delicate balance between preserving the historical charm of your home and ensuring the safety of your family. Our expert general contracting services go beyond knowledge; we bring genuine care for your family's safety and comfort. When you choose us for your remodeling projects, you can trust that we prioritize your well-being, providing not only exceptional craftsmanship but also a commitment to a healthy living environment for you and your loved ones.
Whether it's addressing the unique challenges of Canec ceilings or ensuring your home meets the highest safety standards, Hilweh Builders is here to make your remodeling journey seamless and secure.
Example of Canec Ceilings in Hawaii
This picture is taken from a home with canec ceilings in Oahu.
Resources
https://health.hawaii.gov/heer/files/2019/10/Arsenic-in-Canec-Ceilings-and-Wallboard-in-hawaii-2018.pdf
Contact Us
Hilweh Builders
Chad Hilweh
808-220-5007
chad@hilwehbuilders.com
www.hilwehbuilders.com
