Fiberglass insulation is generally considered non-toxic and safe once installed, but it poses temporary mechanical hazards during handling. The microscopic glass fibers can cause immediate and uncomfortable skin, eye, and respiratory irritation.
Short-term Exposure
Direct contact with fiberglass or breathing airborne dust containing fiberglass may irritate the skin, eyes, nose, and throat. The symptoms of irritation are often nonspecific, temporary, and may include itching, coughing, or wheezing.
No, fiberglass insulation should never be left uncovered. Why? Health Hazards: Exposed fiberglass can release fine particles and fibers into the air, which can cause respiratory irritation, skin rashes, and eye irritation. Long-term exposure can lead to more serious health problems.
It's also a good idea to wear gloves. Fiberglass insulation is made from thin glass fibers that can get into your skin or eyes if you don't wear proper protection. It can also cause respiratory problems and aggravate underlying conditions such as asthma.
While the health risks of asbestos fibers are well-documented, fiberglass is less understood. Like asbestos, fiberglass poses some health risks, but these are less serious than those associated with asbestos. Asbestos is widely recognized as a carcinogen and a leading cause of mesothelioma.
When fiberglass fragments are inhaled and deposited in the small air sacs of the lung, the alveoli do not close up and trap the particles. The particles are expelled from the alveoli and there is a rapid clearance of fiberglass dust particles from the lungs.
The best non-toxic insulation is either mineral wool or foam insulation inserts.
Fiberglass particles' airborne duration typically ranges from 1-2 hours after disturbance in still air. You'll find that larger fibers (>10 micrometers) settle more quickly, while smaller particles may remain suspended longer.
Installers blowing insulation wear a NIOSH-approved filtering facepiece dust respirator (N95 or greater). No workers, unless they wear a NIOSH-approved filtering facepiece dust respirator (N95 or greater), should be permitted in the attic during or immediately after the application.
Mice are curious and always searching for safe, snug, and warm nesting sites. Attics filled with blown-in insulation provide an excellent option–from the mice's point of view. As long as there is a ready food source. Mice are omnivorous and will eat and chew on almost anything including wood and electrical wires.
Many fibreglass products give off fumes which can be harmful if inhaled in sufficiently large quantities. In normal DIY use, reasonable ventilation of the work area will be adequate. Care should be taken particularly when using polyurethane foam mixes. These produce iso-cyanate fumes during the initial reaction.
Fiberglass isn't the worst thing you could be inhaling, but it's certainly not benign. According to multiple states' health departments, inhaling fiberglass can cause coughing, wheezing, and itching. The fibers can also exacerbate existing bronchitis or asthma, cause a sore nose or throat, and irritate the eyes.
Visually, it can often be tricky to tell the difference between asbestos insulation and cellulose insulation. However, while cellulose tends to look like greyish shredded paper, asbestos insulation is generally more pebble-like in its appearance and is greyish-brown or silver-gold in colour.
There is no evidence that fiberglass causes cancer in people.
Fiberglass sickness symptoms include skin irritation, itching or rashes, sore throat, coughing, difficulty breathing, nosebleeds, and eye irritation or redness. Long-term exposure can also lead to gastrointestinal problems, fatigue, and changes in lung function. Always seek medical attention if symptoms persist.
Loose Fill with Air Sealing: The woven fibers in this type of insulation do not inherently stop airflow. While fiberglass insulation adds r-value it does not keep conditioned air from escaping through penetration points.
Health risks of glass fibres
New research results show: Glass fibres are significantly less dangerous than asbestos fibres. Asbestos is now banned in Switzerland, as inhaled fibres can cause serious illnesses such as asbestosis, lung cancer or mesothelioma.
Fibreglass or mineral wool typically requires a 50mm gap for ventilation, while foil insulation needs about 25mm.
Unfaced insulation is great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces. It's best used for interior wall applications that do not face the outside and also in rooms that don't need moisture control, like living rooms, dining rooms and studies.
While we can't claim to have conducted any extensive testing and research on this topic, our installers will definitely agree that initially rinsing off in cool water first, before taking a hot shower, is the recommended approach.
Crystalline silica is hazardous to health
Our lungs have ways to remove some of the dust we breathe in, such as coughing or bringing up phlegm. However, the fine particles can become trapped and cause irritation.
Fiberglass insulation typically needs to be replaced 15-20 years into it's life, as it can easily become dirty, wet, moldy, and ineffective if there's a roof leak or water damage of any kind.
The Five Most Efficient Insulation Materials
Potential problems with spray foam insulation
reduce air circulation and ventilation within a roof space. lead to dampness and condensation on the underside of a roof because it forms an air barrier and stops moisture from escaping. place timber-framed roofs at risk of decay.
ROCKWOOL's reputation as a rodent-resistant insulation is mainly based on word of mouth and lack of negative feedback from numerous customers who use our products in “cottage country”. That being said, if a certain pest type is a nuisance to your particular area, best practice is to protect the insulation.